A Fully Automated POCKIT Central PCR System for Evaluation of the Infectious ...Simon Chung - genereach
This document discusses using PCR to evaluate the uniformity of infectious bronchitis vaccination in chickens. It finds:
1) A POCKIT Central PCR system can detect the IB vaccine virus in tracheal swabs up to 4 weeks after spraying vaccination at hatcheries.
2) Sequence analysis showed nucleic acids detected by the PCR system matched the vaccine used in the study.
3) A PCR positive rate of 40% or higher on day 7 after vaccination could be used as a cutoff for evaluating uniformity, with regular monitoring needed below that threshold.
The study demonstrates PCR is an effective quality control tool for checking IB vaccination uniformity. The portable POCKIT system makes this feasible for poultry grow
A Fully Automated Sample-to-result PCR System for Detecting Infectious DiseasesSimon Chung - genereach
This document describes GeneReach Biotechnology Corporation's POCKIT Central system, a fully automated sample-to-result PCR system for infectious disease detection. The POCKIT Central can detect multiple pathogens from a single sample in less than 2 hours, including dengue virus serotypes. It has been validated against qPCR with equivalent sensitivity and specificity for dengue virus detection and subtyping. The portable and easy-to-use POCKIT Central provides a rapid and accurate molecular diagnostic solution for point-of-care infectious disease testing.
The document discusses the application of polymerase chain reaction (PCR) in detecting infectious diseases. Specifically, it discusses:
1) PCR is a widely used nucleic acid amplification technique that can replicate a specific DNA region millions of times, allowing detection of small amounts of DNA or RNA from infectious pathogens.
2) PCR has revolutionized clinical infectious disease diagnosis by enabling rapid and accurate detection of viruses, bacteria, and other pathogens from patient samples.
3) The document provides examples of how PCR has been used to detect several infectious diseases, including hepatitis B, hepatitis C, human papillomavirus, HIV, influenza, and the novel coronavirus COVID-19.
Corona is here to stay and it is predicted that over 70% of population will get the infection (fortunately not all will fall sick or very sick). (Recovery rate of over 74% & Death rate around 2%).
A lot of confusion exists regarding testing for covid and what test to do, when and how to interpret these tests.
Compiled by Dr. Narendra Malhotra
RT PCR is too slow for effective control of spread of cov 2 infection, rapid antigen test by giving results in less than 30 minutes can help identify infected persons leading to quick isolation.Lack of sensitivity can be compensated by repeating RAT after a day or so.
The Xpert MTB/RIF assay uses molecular beacon probes to detect mutations in the rpoB gene associated with rifampin resistance. It contains five probes that bind to the wild-type rpoB sequence and one probe for an internal sample processing control. If one of the five probes does not bind, it indicates a mutation and rifampin resistance. The assay interprets results based on cycle threshold values and differences in values between probes to determine MTB detection level and presence of resistance. Internal controls verify reagent rehydration, tube filling, and detect inhibition to help prevent false negatives.
Reproducibility, Quality Control and Importance of AutomationQIAGEN
In this webinar, we will introduce you to the key sample quality parameters, discuss their respective impact on downstream applications and how to monitor them, and present the advantages of automating quality control along complex workflows.
A Fully Automated POCKIT Central PCR System for Evaluation of the Infectious ...Simon Chung - genereach
This document discusses using PCR to evaluate the uniformity of infectious bronchitis vaccination in chickens. It finds:
1) A POCKIT Central PCR system can detect the IB vaccine virus in tracheal swabs up to 4 weeks after spraying vaccination at hatcheries.
2) Sequence analysis showed nucleic acids detected by the PCR system matched the vaccine used in the study.
3) A PCR positive rate of 40% or higher on day 7 after vaccination could be used as a cutoff for evaluating uniformity, with regular monitoring needed below that threshold.
The study demonstrates PCR is an effective quality control tool for checking IB vaccination uniformity. The portable POCKIT system makes this feasible for poultry grow
A Fully Automated Sample-to-result PCR System for Detecting Infectious DiseasesSimon Chung - genereach
This document describes GeneReach Biotechnology Corporation's POCKIT Central system, a fully automated sample-to-result PCR system for infectious disease detection. The POCKIT Central can detect multiple pathogens from a single sample in less than 2 hours, including dengue virus serotypes. It has been validated against qPCR with equivalent sensitivity and specificity for dengue virus detection and subtyping. The portable and easy-to-use POCKIT Central provides a rapid and accurate molecular diagnostic solution for point-of-care infectious disease testing.
The document discusses the application of polymerase chain reaction (PCR) in detecting infectious diseases. Specifically, it discusses:
1) PCR is a widely used nucleic acid amplification technique that can replicate a specific DNA region millions of times, allowing detection of small amounts of DNA or RNA from infectious pathogens.
2) PCR has revolutionized clinical infectious disease diagnosis by enabling rapid and accurate detection of viruses, bacteria, and other pathogens from patient samples.
3) The document provides examples of how PCR has been used to detect several infectious diseases, including hepatitis B, hepatitis C, human papillomavirus, HIV, influenza, and the novel coronavirus COVID-19.
Corona is here to stay and it is predicted that over 70% of population will get the infection (fortunately not all will fall sick or very sick). (Recovery rate of over 74% & Death rate around 2%).
A lot of confusion exists regarding testing for covid and what test to do, when and how to interpret these tests.
Compiled by Dr. Narendra Malhotra
RT PCR is too slow for effective control of spread of cov 2 infection, rapid antigen test by giving results in less than 30 minutes can help identify infected persons leading to quick isolation.Lack of sensitivity can be compensated by repeating RAT after a day or so.
The Xpert MTB/RIF assay uses molecular beacon probes to detect mutations in the rpoB gene associated with rifampin resistance. It contains five probes that bind to the wild-type rpoB sequence and one probe for an internal sample processing control. If one of the five probes does not bind, it indicates a mutation and rifampin resistance. The assay interprets results based on cycle threshold values and differences in values between probes to determine MTB detection level and presence of resistance. Internal controls verify reagent rehydration, tube filling, and detect inhibition to help prevent false negatives.
Reproducibility, Quality Control and Importance of AutomationQIAGEN
In this webinar, we will introduce you to the key sample quality parameters, discuss their respective impact on downstream applications and how to monitor them, and present the advantages of automating quality control along complex workflows.
Cancer Research & the Challenges of FFPE Samples – An IntroductionQIAGEN
A cascade of complex genetic and epigenetic changes regulate tumor formation and progression. Gene expression analyses can shed light on these changes at a molecular level and identify the key genes and associated pathways involved in cancer. Often the samples used in cancer research are FFPE samples, which pose a significant challenge in terms of nucleic acid quality. The quality of nucleic acids extracted from FFPE samples depends on a number of factors, including how the samples were handled before, during and after fixation and embedding.
Dr. Vishwadeepak Tripathi describes the variability of sample purification from FFPE samples – in particular, samples to be used in cancer research. What are the challenges and solutions, and what quality control approach can ensure credible results? This webinar will focus on sample purification and the quality control of FFPE samples and compare different automated purification procedures.
This document discusses transfusion-transmitted infections (TTIs) and methods for screening donated blood. It notes that TTIs include viruses like HIV, HBV, HCV that can remain undetected in the blood donor but be transmissible. Screening methods include serological tests like ELISA, CLIA, rapid tests, as well as nucleic acid amplification tests (NAATs) that can detect infections earlier. Implementing individual donor NAT in addition to serological screening provides an additional safety layer and reduces the risk window period for TTIs in blood donations.
Assessment of Y chromosome degradation level using the Investigator® Quantipl...QIAGEN
Assessment of Y chromosome degradation level using the Investigator® Quantiplex® Pro RGQ Kit, presented by Dr. Tomasz Kupiec, Head of the Forensic Genetics Section, Institute of Forensic Research, Krakow, Poland on June 14, 2018.
RotorGene Q A Rapid, Automatable real-time PCR Instrument for Genotyping and...QIAGEN
The document describes the Rotor-Gene Q real-time PCR instrument. It has a unique centrifugal design that allows for excellent thermal and optical precision compared to block-based instruments. Each reaction tube spins individually, providing very precise temperature uniformity between wells. It also uses LED technology for excitation and filters for detection, allowing for multiple detection channels without need for normalization or reference dyes. Applications mentioned include quantitative PCR, high resolution melt analysis, genotyping, pathogen detection, and multiplex PCR. QIAGEN products are highlighted such as kits, controls, and the QIAgility liquid handler for automated real-time PCR setup.
SARS-CoV-2 (COVID-19) is the virus responsible for respiratory disease caused by a novel (new) coronavirus that was first detected in Wuhan City, Hubei Province, China, later causing a global pandemic.
The virus is contagious and can be spread from humans to humans primarily through the exchange of mucus droplets that are expelled through sneezes or coughs.
The SARS-CoV-2 is a severe acute respiratory syndrome coronavirus. This outbreak is an important reminder that the global community must strengthen national and international programs for detection and response to future disease outbreaks.
Critical Steps for Real-Time PCR Analysis: Tips and Solutions to Achieve Effi...QIAGEN
In this slidedeck, we cover the following topics which are critical steps for efficient and precise gene expression studies using real-time PCR technology:
1) Effect of RNA integrity on real-time PCR results – tips to achieve a true RNA profiling suitable for real-time PCR studies
2) Improved methods for cDNA synthesis, optimized for real-time PCR
3) Real-time PCR analysis:
• Real-time PCR essentials and background information on different quantification strategies
• SYBR Green real-time PCR – factors influencing specificity
• Introduction to probe technology
• New, fast and efficient real-time PCR solutions
PCR Array Data Analysis Tutorial: qPCR Technology Webinar Series Part 3QIAGEN
This webinar presentation provides an overview and tutorial on analyzing data from RT2 Profiler PCR Array experiments. It discusses organizing raw Ct value data, performing ΔCt and ΔΔCt calculations to analyze gene expression changes between sample groups, and using the GeneGlobe Data Analysis Center web portal to analyze the data. The webinar highlights new features of the Data Analysis Center including improved data visualization and an upgraded sample manager. It emphasizes following the standard protocol for setting baselines and thresholds when analyzing PCR array data.
1) The document discusses the use of Loop-Mediated Isothermal Amplification (LAMP) to detect and amplify DNA from several agricultural viruses, including avian influenza virus, West Nile virus, fish iridovirus, white spot syndrome virus, Japanese yam mosaic virus, tomato yellow leaf curl virus, and tomato spotted wilt virus.
2) LAMP methods were found to be more rapid and sensitive than PCR for detecting avian influenza virus and West Nile virus. LAMP could also detect fish iridovirus, white spot syndrome virus, Japanese yam mosaic virus, tomato yellow leaf curl virus, and tomato spotted wilt virus from infected samples.
3) In
1) Molecular testing for Covid-19 detection includes RT-PCR, TRUE NAT, and CB NAAT tests which detect viral RNA through nucleic acid amplification.
2) Antigen tests detect viral proteins and provide rapid results but have lower sensitivity than molecular tests.
3) Antibody tests detect antibodies produced after infection but cannot be used for diagnosis as they become positive later.
4) Newer modalities under research include multiplex assays, LAMP, CRISPR and other techniques for faster, portable, and higher-throughput Covid-19 testing.
Real time rt-pcr Test molecolare per covid-19 (Sars-CoV-2) Protocollo UfficialeIULALaboratorioAnali
Protocollo ufficiale per la ricerca e amplificazione di RNA virale mediante tecnica PCR-RealTime per l'individuazione del virus Covid-19
Per maggiori informazioni: https://www.laboratorioiula.com
Rapid Microbial Methods (RMM) offer pharmaceutical manufacturers the opportunity to improve the time to results (TTR) for testing in the microbial quality control lab. With growth-based methods, part of the validation process includes determination of the appropriate time-point to obtain comparable detection to the traditional method.
Dr. Andrew Sage outlines steps to perform this process using the Growth Direct System. Learn more at www.rapidmicrobio.com
Profile Multiple Cytokines and Chemokines Simultaneously with Very High Sensi...QIAGEN
Learn how to profile multiple cytokines and chemokines simultaneously with very high sensitivity and specificity using the standard ELISA reader. Available in different formats to suit your research needs such as single-analyte, multi-analyte or custom mix-n-match format for human, mouse and rat.
Learn about the power of LNA (Locked Nucleic Acid) technology and QIAGEN's LNA enhanced product portfolio for RNA and DNA research. Download the slide deck!
The COVID-19 pandemic, also known as the corona virus pandemic, is an ongoing pandemic of corona virus disease 2019 (COVID‑19) caused by severe acute respiratory syndrome corona virus 2 (SARS‑CoV‑2).
Though several trials for candidate vaccines and potential therapies are underway, there is currently no cure, and in the absence of either proven effective therapy or a vaccine, diagnostic testing becomes a valuable tool. Testing is our window onto the pandemic and how it is spreading. Without data on who is infected by the virus we have no way of understanding the pandemic. Without this data we cannot know which countries are doing well, and which are just underreporting cases and deaths.
At IntellectPeritus, we have collected around 100 diagnostic kits (used in SARS-COV-2 diagnosis) and around 50 patent documents as sample report and have tried to put value added technology categories to generate specific insights quickly using our deliverable “Innovigence Corona”.
If you are interested in detailed or any customized report for SARS-COV-2 diagnostic kits please feel free to write to us at sales@intellectperitus.com
Polymerase chain reaction (PCR) is a method widely used to rapidly make millions to billions of copies of a specific DNA sample, allowing scientists to take a very small sample of DNA and amplify it to a large enough amount to study in detail. PCR was invented in 1984 by the American biochemist Kary Mullis at Cetus Corporation. It is fundamental to much of genetic testing including analysis of ancient samples of DNA and identification of infectious agents. Using PCR, copies of very small amounts of DNA sequences are exponentially amplified in a series of cycles of temperature changes. PCR is now a common and often indispensable technique used in medical laboratory and clinical laboratory research for a broad variety of applications including biomedical research and criminal forensics
This slidedeck presents a simple and accurate real-time PCR system for relevant biological pathway- and disease-focused mRNA and long noncoding RNA (lncRNA) expression profiling. Learn about the stringent performance built into the technology to ensure its sensitivity, specificity, reproducibility and reliability. Application examples are also presented.
Apac distributor training series 3 swift product for cancer studySwift Biosciences
This document provides an overview of Swift Biosciences' product training series for their APAC distributors on using Swift products for cancer studies. It summarizes different Swift library preparation and sequencing kits that can be used for various cancer applications, including genomic sequencing, RNA sequencing, amplicon panels, hybridization capture, and DNA methylation. The document also reviews types of mutations found in cancer, considerations for cancer clinical workflows, and provides an example of using Swift's 2S Turbo kit for targeted sequencing of formalin-fixed, paraffin-embedded tissue samples.
This document summarizes a class on detecting, quantifying, and tracking variations of SARS-CoV-2 RNA from COVID-19 samples. It discusses using quantitative RT-PCR (qRT-PCR) to detect and measure viral RNA levels in samples. Sequencing is used to identify variations in the viral genome over time, and online tools like Nextstrain allow viewing the evolution and global transmission of variants. Genotyping assays are also described that can rapidly screen samples for known single nucleotide variations during PCR.
Neil leblanc f7 rapid methods call amsterdam may 2010sva-slu_oie-cc
The document summarizes a strategic meeting discussing the development and use of multiplex assays using Luminex technology. Methods allow the detection of up to 100 unique assays in a single sample, and have been used to detect and subtype pestiviruses, avian influenza viruses, African swine fever virus, and cytokines. The technology provides a sensitive and specific platform for pathogen identification and characterization applicable to diagnostic laboratories.
One of the main challenges for a versatile application of monitoring technologies in the
veterinary and food industry is to develop fast, quantitative and low cost devices that
can be used with minimal expertise. Most of the diagnostic technologies in use today
require laboratory facilities, expensive equipments and trained personnel. During the
last decade, a few technologies have been proposed and developed that fulfill most
requirements of versatility mentioned above. One of the most promising approaches is
the lateral flow immunoassay technique.
Cancer Research & the Challenges of FFPE Samples – An IntroductionQIAGEN
A cascade of complex genetic and epigenetic changes regulate tumor formation and progression. Gene expression analyses can shed light on these changes at a molecular level and identify the key genes and associated pathways involved in cancer. Often the samples used in cancer research are FFPE samples, which pose a significant challenge in terms of nucleic acid quality. The quality of nucleic acids extracted from FFPE samples depends on a number of factors, including how the samples were handled before, during and after fixation and embedding.
Dr. Vishwadeepak Tripathi describes the variability of sample purification from FFPE samples – in particular, samples to be used in cancer research. What are the challenges and solutions, and what quality control approach can ensure credible results? This webinar will focus on sample purification and the quality control of FFPE samples and compare different automated purification procedures.
This document discusses transfusion-transmitted infections (TTIs) and methods for screening donated blood. It notes that TTIs include viruses like HIV, HBV, HCV that can remain undetected in the blood donor but be transmissible. Screening methods include serological tests like ELISA, CLIA, rapid tests, as well as nucleic acid amplification tests (NAATs) that can detect infections earlier. Implementing individual donor NAT in addition to serological screening provides an additional safety layer and reduces the risk window period for TTIs in blood donations.
Assessment of Y chromosome degradation level using the Investigator® Quantipl...QIAGEN
Assessment of Y chromosome degradation level using the Investigator® Quantiplex® Pro RGQ Kit, presented by Dr. Tomasz Kupiec, Head of the Forensic Genetics Section, Institute of Forensic Research, Krakow, Poland on June 14, 2018.
RotorGene Q A Rapid, Automatable real-time PCR Instrument for Genotyping and...QIAGEN
The document describes the Rotor-Gene Q real-time PCR instrument. It has a unique centrifugal design that allows for excellent thermal and optical precision compared to block-based instruments. Each reaction tube spins individually, providing very precise temperature uniformity between wells. It also uses LED technology for excitation and filters for detection, allowing for multiple detection channels without need for normalization or reference dyes. Applications mentioned include quantitative PCR, high resolution melt analysis, genotyping, pathogen detection, and multiplex PCR. QIAGEN products are highlighted such as kits, controls, and the QIAgility liquid handler for automated real-time PCR setup.
SARS-CoV-2 (COVID-19) is the virus responsible for respiratory disease caused by a novel (new) coronavirus that was first detected in Wuhan City, Hubei Province, China, later causing a global pandemic.
The virus is contagious and can be spread from humans to humans primarily through the exchange of mucus droplets that are expelled through sneezes or coughs.
The SARS-CoV-2 is a severe acute respiratory syndrome coronavirus. This outbreak is an important reminder that the global community must strengthen national and international programs for detection and response to future disease outbreaks.
Critical Steps for Real-Time PCR Analysis: Tips and Solutions to Achieve Effi...QIAGEN
In this slidedeck, we cover the following topics which are critical steps for efficient and precise gene expression studies using real-time PCR technology:
1) Effect of RNA integrity on real-time PCR results – tips to achieve a true RNA profiling suitable for real-time PCR studies
2) Improved methods for cDNA synthesis, optimized for real-time PCR
3) Real-time PCR analysis:
• Real-time PCR essentials and background information on different quantification strategies
• SYBR Green real-time PCR – factors influencing specificity
• Introduction to probe technology
• New, fast and efficient real-time PCR solutions
PCR Array Data Analysis Tutorial: qPCR Technology Webinar Series Part 3QIAGEN
This webinar presentation provides an overview and tutorial on analyzing data from RT2 Profiler PCR Array experiments. It discusses organizing raw Ct value data, performing ΔCt and ΔΔCt calculations to analyze gene expression changes between sample groups, and using the GeneGlobe Data Analysis Center web portal to analyze the data. The webinar highlights new features of the Data Analysis Center including improved data visualization and an upgraded sample manager. It emphasizes following the standard protocol for setting baselines and thresholds when analyzing PCR array data.
1) The document discusses the use of Loop-Mediated Isothermal Amplification (LAMP) to detect and amplify DNA from several agricultural viruses, including avian influenza virus, West Nile virus, fish iridovirus, white spot syndrome virus, Japanese yam mosaic virus, tomato yellow leaf curl virus, and tomato spotted wilt virus.
2) LAMP methods were found to be more rapid and sensitive than PCR for detecting avian influenza virus and West Nile virus. LAMP could also detect fish iridovirus, white spot syndrome virus, Japanese yam mosaic virus, tomato yellow leaf curl virus, and tomato spotted wilt virus from infected samples.
3) In
1) Molecular testing for Covid-19 detection includes RT-PCR, TRUE NAT, and CB NAAT tests which detect viral RNA through nucleic acid amplification.
2) Antigen tests detect viral proteins and provide rapid results but have lower sensitivity than molecular tests.
3) Antibody tests detect antibodies produced after infection but cannot be used for diagnosis as they become positive later.
4) Newer modalities under research include multiplex assays, LAMP, CRISPR and other techniques for faster, portable, and higher-throughput Covid-19 testing.
Real time rt-pcr Test molecolare per covid-19 (Sars-CoV-2) Protocollo UfficialeIULALaboratorioAnali
Protocollo ufficiale per la ricerca e amplificazione di RNA virale mediante tecnica PCR-RealTime per l'individuazione del virus Covid-19
Per maggiori informazioni: https://www.laboratorioiula.com
Rapid Microbial Methods (RMM) offer pharmaceutical manufacturers the opportunity to improve the time to results (TTR) for testing in the microbial quality control lab. With growth-based methods, part of the validation process includes determination of the appropriate time-point to obtain comparable detection to the traditional method.
Dr. Andrew Sage outlines steps to perform this process using the Growth Direct System. Learn more at www.rapidmicrobio.com
Profile Multiple Cytokines and Chemokines Simultaneously with Very High Sensi...QIAGEN
Learn how to profile multiple cytokines and chemokines simultaneously with very high sensitivity and specificity using the standard ELISA reader. Available in different formats to suit your research needs such as single-analyte, multi-analyte or custom mix-n-match format for human, mouse and rat.
Learn about the power of LNA (Locked Nucleic Acid) technology and QIAGEN's LNA enhanced product portfolio for RNA and DNA research. Download the slide deck!
The COVID-19 pandemic, also known as the corona virus pandemic, is an ongoing pandemic of corona virus disease 2019 (COVID‑19) caused by severe acute respiratory syndrome corona virus 2 (SARS‑CoV‑2).
Though several trials for candidate vaccines and potential therapies are underway, there is currently no cure, and in the absence of either proven effective therapy or a vaccine, diagnostic testing becomes a valuable tool. Testing is our window onto the pandemic and how it is spreading. Without data on who is infected by the virus we have no way of understanding the pandemic. Without this data we cannot know which countries are doing well, and which are just underreporting cases and deaths.
At IntellectPeritus, we have collected around 100 diagnostic kits (used in SARS-COV-2 diagnosis) and around 50 patent documents as sample report and have tried to put value added technology categories to generate specific insights quickly using our deliverable “Innovigence Corona”.
If you are interested in detailed or any customized report for SARS-COV-2 diagnostic kits please feel free to write to us at sales@intellectperitus.com
Polymerase chain reaction (PCR) is a method widely used to rapidly make millions to billions of copies of a specific DNA sample, allowing scientists to take a very small sample of DNA and amplify it to a large enough amount to study in detail. PCR was invented in 1984 by the American biochemist Kary Mullis at Cetus Corporation. It is fundamental to much of genetic testing including analysis of ancient samples of DNA and identification of infectious agents. Using PCR, copies of very small amounts of DNA sequences are exponentially amplified in a series of cycles of temperature changes. PCR is now a common and often indispensable technique used in medical laboratory and clinical laboratory research for a broad variety of applications including biomedical research and criminal forensics
This slidedeck presents a simple and accurate real-time PCR system for relevant biological pathway- and disease-focused mRNA and long noncoding RNA (lncRNA) expression profiling. Learn about the stringent performance built into the technology to ensure its sensitivity, specificity, reproducibility and reliability. Application examples are also presented.
Apac distributor training series 3 swift product for cancer studySwift Biosciences
This document provides an overview of Swift Biosciences' product training series for their APAC distributors on using Swift products for cancer studies. It summarizes different Swift library preparation and sequencing kits that can be used for various cancer applications, including genomic sequencing, RNA sequencing, amplicon panels, hybridization capture, and DNA methylation. The document also reviews types of mutations found in cancer, considerations for cancer clinical workflows, and provides an example of using Swift's 2S Turbo kit for targeted sequencing of formalin-fixed, paraffin-embedded tissue samples.
This document summarizes a class on detecting, quantifying, and tracking variations of SARS-CoV-2 RNA from COVID-19 samples. It discusses using quantitative RT-PCR (qRT-PCR) to detect and measure viral RNA levels in samples. Sequencing is used to identify variations in the viral genome over time, and online tools like Nextstrain allow viewing the evolution and global transmission of variants. Genotyping assays are also described that can rapidly screen samples for known single nucleotide variations during PCR.
Neil leblanc f7 rapid methods call amsterdam may 2010sva-slu_oie-cc
The document summarizes a strategic meeting discussing the development and use of multiplex assays using Luminex technology. Methods allow the detection of up to 100 unique assays in a single sample, and have been used to detect and subtype pestiviruses, avian influenza viruses, African swine fever virus, and cytokines. The technology provides a sensitive and specific platform for pathogen identification and characterization applicable to diagnostic laboratories.
One of the main challenges for a versatile application of monitoring technologies in the
veterinary and food industry is to develop fast, quantitative and low cost devices that
can be used with minimal expertise. Most of the diagnostic technologies in use today
require laboratory facilities, expensive equipments and trained personnel. During the
last decade, a few technologies have been proposed and developed that fulfill most
requirements of versatility mentioned above. One of the most promising approaches is
the lateral flow immunoassay technique.
The document discusses viral load testing using NASBA (Nucleic Acid Sequence-Based Amplification) technology. It describes the NASBA process which uses 3 enzymes to amplify viral RNA or DNA in one temperature. The document provides examples of using NASBA to test viral load in HIV samples and discusses the benefits of NASBA including its high throughput, minimal hands-on time, and ability to detect down to 10-10^7 copies/ml.
LSD symposium - C. Batten - LSDV diagnostic capabilities at PirbrightEuFMD
The Pirbright Institute provides diagnostic testing and technical support for lumpy skin disease (LSD) and other non-vesicular diseases. They have ISO/IEC 17025 accredited diagnostic tests for LSD including real-time PCR and ELISA. Samples submitted from the UK are tested using PCR, virus isolation, sequencing and other confirmatory tests. They also provide training courses and conduct research on LSDV strains and diagnostic assays to differentiate vaccine from wildtype viruses.
A original article presentation in journal club.
It gives you better idea how to present a research article.
A cross sectional study was conducted to compare two different methods first is rapid card test and other is real time pcr for the diagnosis of corona virus disease.
Sensitivity assay of polymerase chain reaction for detection of canine adeno ...Alexander Decker
This study aimed to determine the minimum detection limit of canine adeno virus (CAV) in clinical samples using polymerase chain reaction (PCR). PCR was performed on 40 blood samples from different regions of India using reported primers for CAV detection. Positive PCR samples were serially diluted and used as templates to determine the lowest concentration detectable by PCR. The minimum detection limit was found to be a 1:1000 dilution, equivalent to 0.20 ng of DNA per microliter. The study demonstrated PCR is a sensitive method for early detection of CAV infection in clinical samples.
Applications of Whole Genome Sequencing (WGS) to Food Safety – Perspective fr...ExternalEvents
http://tiny.cc/faowgsworkshop
Applications of genome sequencing technology on food safety management- United Kingdom. Presentation from the FAO expert workshop on practical applications of Whole Genome Sequencing (WGS) for food safety management - 7-8 December 2015, Rome, Italy.
A field-deployable RT-PCR system performs equivalently to real-time RT-PCR in...Simon Chung - genereach
A field-deployable RT-PCR system was found to perform equivalently to real-time RT-PCR in detecting type 2 porcine reproductive and respiratory syndrome virus (PRRSV). The field-deployable system provided results within 2 hours compared to 2.5 days for laboratory RT-PCR. Testing 50 vaccinated and 50 unvaccinated piglets over 11 weeks showed 96.25% agreement between the two methods. The field-deployable PCR system has potential for timely PRRSV detection and biosecurity management at points of need.
Rapid replication competent adenovirus (rRCA) detection: Accelerate your lot ...Merck Life Sciences
Watch the presentation of this webinar here: https://bit.ly/3MJ4u9V
Testing for presence of replication competent adenovirus (RCA) is a key component to ensure patient safety and a requirement for all biologicals manufactured using adenoviral vectors. For many adenoviral-based products, the RCA assay is a rate-limiting assay for lot release.
Join this webinar to learn about a rapid RCA detection assay currently in development, which combines a 7-day culture assay with a highly sensitive molecular endpoint specific for RCA. The method can detect presence of as little as 1 RCA in adenoviral vector material at an approximate concentration of 5x107 - 2x108 vector particles (VP)/mL, making it a suitable method to meet regulatory requirements while accelerating your lot release timelines.
In this webinar, you will learn about:
• Regulatory framework for adenoviral vector products
• Considerations for lot release testing of adenoviral-based therapies
• Advantages of a rapid method for RCA testing on production lot material
Presented by:
Axel Fun, Ph.D.,
Principal Scientist
Alberto Santana, MBA,
Product Manager, Biologics Biosafety Testing
Rapid Replication Competent Adenovirus (rRCA) Detection: Accelerate your Lot ...MilliporeSigma
Watch the presentation of this webinar here: https://bit.ly/3MJ4u9V
Testing for presence of replication competent adenovirus (RCA) is a key component to ensure patient safety and a requirement for all biologicals manufactured using adenoviral vectors. For many adenoviral-based products, the RCA assay is a rate-limiting assay for lot release.
Join this webinar to learn about a rapid RCA detection assay currently in development, which combines a 7-day culture assay with a highly sensitive molecular endpoint specific for RCA. The method can detect presence of as little as 1 RCA in adenoviral vector material at an approximate concentration of 5x107 - 2x108 vector particles (VP)/mL, making it a suitable method to meet regulatory requirements while accelerating your lot release timelines.
In this webinar, you will learn about:
• Regulatory framework for adenoviral vector products
• Considerations for lot release testing of adenoviral-based therapies
• Advantages of a rapid method for RCA testing on production lot material
Presented by:
Axel Fun, Ph.D.,
Principal Scientist
Alberto Santana, MBA,
Product Manager, Biologics Biosafety Testing
The document discusses various laboratory methods for the diagnosis of Mycobacterium tuberculosis infection and tuberculosis, including:
1) Microscopic examination of sputum or other samples to look for acid-fast bacilli via staining techniques.
2) Culture-based techniques to isolate M. tuberculosis from samples on solid or liquid media over several weeks.
3) Biochemical and molecular tests to identify M. tuberculosis and determine drug resistance from cultures.
4) Immunological tests like the Mantoux test, interferon-gamma release assays, and ELISPOT to detect immune responses to M. tuberculosis antigens.
Cowin Biotech is a Chinese biotech company founded in 2007 that provides molecular diagnostic products and services. The company has R&D centers in Jiangsu, Beijing, and Boston and produces over 1,000 products through independent research. Cowin's core capabilities include viral transport media, nucleic acid extraction kits, PCR reagents, and enzymes. It aims to provide a complete solution for clinical diagnostic applications.
Next Generation Sequencing- NGS for COVID19 PPTMesele Tilahun
This document presents a next-generation sequencing (NGS)-based method for diagnosing COVID-19 using a single-step RNA extraction. The method was tested on 336 clinical samples and showed high accuracy compared to RT-PCR, the gold standard method. Key advantages of the NGS approach include higher scalability allowing thousands of samples to be tested simultaneously, and higher sensitivity to detect SARS-CoV-2 RNA compared to RT-PCR. The method provides individual qualitative results for each patient sample along with viral load estimates based on sequencing coverage.
The document describes a rapid test kit for detecting canine parvovirus antigen in dog feces. Canine parvovirus causes inflammation of the intestines and other symptoms like vomiting and diarrhea. The test uses lateral flow immunoassay to detect parvovirus antigen in a fecal sample in 5-10 minutes. It has a sensitivity of 98.5% and specificity of 98% compared to ELISA tests. A positive result confirms parvovirus infection while a negative result does not rule it out, as virus shedding may be short.
Laboratory animal cage washing has traditionally employed very hot rinse or wash water to assure the destruction of microbial agents which can cause disease in laboratory animals. This study shows an alternative that may conserve substantial amounts of energy and still provide suitable results.
6-8-2015 AACC Poster HIV p24 S-PLEX - Stengelin_finalLawrence Hwang
The document describes Meso Scale Diagnostics' (MSD) development of a highly sensitive electrochemiluminescence immunoassay for detecting HIV p24 protein. Key points:
- MSD developed a next-generation p24 assay using their S-PLEX technology that is 10,000 times more sensitive than current p24 ELISAs and comparable to PCR assays.
- The assay has a detection limit of 1 fg/mL (less than 1 virus particle) and can be run on MSD's QuickPlex and SECTOR platforms without specialized equipment.
- Testing of seroconversion panels demonstrated the assay was as sensitive as PCR methods at detecting acute HIV infection between sample collection days.
This document provides information on the diagnosis and management of tuberculosis (TB) under the Revised National Tuberculosis Control Program (RNTCP) in India. It discusses the diagnostic approaches for pulmonary and extra-pulmonary TB including symptoms, bacteriological methods like smear microscopy and culture, histopathological examination, radiological imaging, and serological and biochemical markers. It also describes various rapid diagnostic tests like nucleic acid amplification tests, line probe assays, and the Xpert MTB/RIF test. The document outlines the laboratory methods for diagnosis including solid and liquid culture and discusses new techniques like molecular diagnosis. It highlights the components of DOTS strategy implemented under the RNTCP for effective TB management in India.
Similar to OS16 - 6.G4.a Evaluation of Oral Swabs for FMDV Surveillance - P. Kirkland (20)
VADEMOS VAccine Demand Estimation Model for FMD.pdfEuFMD
VADEMOS is a decision support tool created by the European Commission for the Control of Foot-and-Mouth Disease to estimate current and future vaccine demand for foot-and-mouth disease at national and regional levels. It uses factors like livestock population forecasts, disease control policies, vaccination schedules, and outbreak forecasts with data from sources like WOAH and FAOSTAT. The model provides outputs on expected vaccine doses needed by geography, type of vaccination, species, and year over a 10-year period. While validation is needed, the tool generally predicts vaccine needs within calculated ranges, though estimates are sometimes too high. Future work will refine inputs, add additional geographical specificity, and expand the model to other diseases.
This document provides an introduction to vaccine value chains and outlines EuFMD/FAO initiatives to strengthen vaccine security. It discusses how vaccine value chains involve both private and public actors across product development, production, allocation, distribution and use. Cross-cutting factors like epidemiology, logistics and stakeholder engagement are also important. EuFMD is supporting activities to improve vaccine access and availability through a multistakeholder platform, prequalification of vaccines, vaccine demand modeling, and strengthening vaccine delivery and demand. Analyzing vaccine value chains can help understand costs and demand to support effective vaccination programs.
Emergency vaccination workshop presentations 30 May 2023.pdfEuFMD
This document summarizes a presentation on alternative post-vaccination surveillance methods that could be used to demonstrate the absence of foot-and-mouth disease (FMD) virus transmission in vaccinated and unvaccinated livestock populations. It proposes replacing serological testing with bulk milk testing for dairy farms, saliva testing using rope tethers for piggeries, and saliva swab testing for sheep farms. These alternative methods utilize real-time reverse transcription polymerase chain reaction to detect FMD viral RNA from oral fluid samples, which research has shown can identify infected animals. The presentation discussed how these new testing technologies may allow countries to gain freedom from FMD status sooner after an outbreak by providing more effective post-vaccination surveillance.
LSD symposium - A. Sprygin - Subclinical infection its role in transmission a...EuFMD
The document discusses subclinical infection and its role in the transmission and epidemiology of Lumpy Skin Disease Virus (LSDV). It presents the body temperatures of experimental animals infected with LSDV over time. One animal showed clinical signs of LSDV while another showed viremia or presence of the virus in the blood without displaying clinical signs, representing a subclinical infection. The conclusion is that subclinical infection from vaccine-like recombinant LSDV can play a role in transmission of the virus.
LSD symposium - L. Pite - Combating lumpy skin disease in AlbaniaEuFMD
1) The first case of Lumpy Skin Disease (LSD) in Albania was identified in June 2016. From 2016-2017, over 3,500 outbreaks were reported across Albania with morbidity of 42% and mortality of 12%.
2) Surveillance efforts included laboratory testing of over 2,000 samples confirming 881 positive cases. Risk factors for spread included proximity to infected farms (under 5km), livestock movements over longer distances, and seasonal variations correlated with temperature and vector abundance.
3) Control efforts included an emergency vaccination program using live attenuated vaccine beginning in July 2016. Over 500,000 vaccine doses were administered. Modeling estimated vaccine effectiveness was 76.5-62.5% at reducing
LSD symposium - J. Chan - Lumpy skin disease in Hong KongEuFMD
Dr. Jason Chan presented on the outbreak of Lumpy Skin Disease (LSD) in feral cattle populations in Hong Kong from 2020-2021. The key points were:
1) The initial outbreak was reported in October 2020 across multiple country parks. Disease investigation found that 72% of cattle in one herd showed skin lesions and 84% were seropositive.
2) By March 2021, no new clinical cases were reported. Surveillance since found 14 juveniles seronegative, suggesting LSD may have disappeared due to lack of susceptible newborn cattle.
3) Continued clinical and serological surveillance is important since Hong Kong has a small teaching farm. No urgency exists currently to declare freedom
LSD symposium - N. Zainuddin - Indonesian experience on simultaneous LSD and ...EuFMD
1) Lumpy skin disease was first reported in Indonesia in February 2022 in Riau Province, and has since spread to several other provinces, most recently to Central Java in August 2022.
2) As of February 2023, over 249,000 cattle have been vaccinated across 9 provinces as a control measure. Other control measures include movement restrictions, vector control, and educating farmers.
3) Key challenges to control efforts include the extensive animal farming system, illegal animal movement, limited number of vaccinators, and high workload from controlling both lumpy skin disease and foot-and-mouth disease. Recommended solutions include improving handling capacity, better border control, engaging other institutions to assist with vaccination
LSD symposium - R. Ainsworth - Lumpy skin disease (LSD) in Southeast Asia Mar...EuFMD
Lumpy Skin Disease (LSD) is spreading through cattle movements in Southeast Asia. The document discusses how government policies around quarantine, compensation and corruption can accelerate the virus's spread by encouraging illicit cattle movements. It also notes that traditional smuggling routes go against the direction LSD has spread. The rapid transmission of LSD occurred during COVID border closures, and its direction of movement corresponds with prevailing winds rather than cattle trade routes. Government policies and wind patterns may be aiding the long-distance airborne spread of LSD across Southeast Asia.
LSD symposium - P. Malik - Lumpy skin disease experience from IndiaEuFMD
Lumpy Skin Disease (LSD) was first reported in India in 2019. It has since spread to 23 states and union territories, affecting over 3 million animals and causing over 185,000 deaths. The disease manifests as skin nodules and lesions on internal organs. Vaccination is a key control strategy, with over 87 million animals vaccinated to date using a goatpox vaccine. ICAR has also developed an indigenous LSD vaccine that is undergoing field trials and licensing. States are implementing control measures like quarantine, vaccination, vector control and public awareness campaigns to curb the spread and impact of LSD.
LSD symposium - E. Klemen - Modes of transmission of lumpy skin diseaseEuFMD
Indirect transmission, likely through blood-sucking flying insects, is the primary mode of transmission for lumpy skin disease virus. While direct contact can transmit the virus, studies have found no transmission between clinically infected and susceptible cattle housed together without vectors. Mathematical models also indicate indirect transmission alone can explain outbreak dynamics. The virus can spread over long distances, possibly aided by winds carrying infected vectors, though local spread is typically 10 km per week. Subclinical infections may transmit the virus but appear to play a minor role compared to clinical cases.
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
(June 12, 2024) Webinar: Development of PET theranostics targeting the molecu...Scintica Instrumentation
Targeting Hsp90 and its pathogen Orthologs with Tethered Inhibitors as a Diagnostic and Therapeutic Strategy for cancer and infectious diseases with Dr. Timothy Haystead.
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdfSelcen Ozturkcan
Ozturkcan, S., Berndt, A., & Angelakis, A. (2024). Mending clothing to support sustainable fashion. Presented at the 31st Annual Conference by the Consortium for International Marketing Research (CIMaR), 10-13 Jun 2024, University of Gävle, Sweden.
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...Leonel Morgado
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
OS16 - 6.G4.a Evaluation of Oral Swabs for FMDV Surveillance - P. Kirkland
1. Evaluation of oral swabs for surveillance and high throughput testing for FMDV.
R. J. Davis and P.D. Kirkland, Virology Laboratory,
Elizabeth Macarthur Agricultural Institute (EMAI)
2. www.dpi.nsw.gov.au
FMDV surveillance options
l Clinical examinations of cattle and pigs are usually
considered adequate to provide a high level of sensitivity
for the detection of infection in unvaccinated animals.
3. www.dpi.nsw.gov.au
FMDV surveillance options
l Sheep can often become infected but only
show mild or no clinical signs
l Virus loads are lower than cattle or pigs
but can act as a reservoir to disseminate
virus (eg UK)
l FMDV detection in sheep typically
depends on serology or virus isolation on
tissues or blood.
4. www.dpi.nsw.gov.au
FMDV transmission studies
l Over the last decade Dutch
researchers have undertaken a
series of FMDV transmission
studies that have involved
sheep;
l A wide range of samples had
been collected for virus isolation
and serology;
l Some samples had been tested
by qRT-PCR using manual
extractions
5. www.dpi.nsw.gov.au
FMDV surveillance questions
l Dutch studies had shown FMDV could be isolated from blood and oral swabs;
l Virus could be isolated from oral swabs for longer than detection in blood;
l Could oral swabs be used for FMDV surveillance in sheep by using qRT-PCR
in a high throughput format?
l Is there potential to pool oral swab samples for qRT-PCR testing?
6. www.dpi.nsw.gov.au
FMDV research strategy
l CVI Lelystad, The Netherlands retained
archival samples from all published studies;
l All samples were offered for testing but
facilities at Lelystad not suitable for high
through-put testing;
l Collaborating laboratory identified – FLI, Insel
Reims, Germany;
l Consultation re suitable level of pooling - Will
vary depending on stage of infection;
l Pooling questions – all samples on the same
day? A cross sectional mix? What should be
pooled – original samples? NA extracts?
7. www.dpi.nsw.gov.au
FMDV project planning logistics & challenges
l Agreement on test methods (NA extraction,
qRT-PCR and reagents)
l Use of internal control
l “Pre-project” testing – comparison of all
reagents
l Shipment of reagents to Germany
l Sample transfer - >4000 samples across
FMDV free country;
l Selection of samples for testing
l Agreement on pooling options
8. www.dpi.nsw.gov.au
FMDV test methods
l Overall aim was to simulate methods in routine use
at EMAI
l Sample handling – sample into MagMax lysis buffer
l NA extraction protocol – using MagMax-96 RNA kit
on KF96 platform
l Assay & reagents – AgPath RT mastermix and OIE
3D assay;
l Selection of internal control – available to all labs
l Pooling – practical, rapid and takes stage of
infection into account
9. www.dpi.nsw.gov.au
The FLI Method Sample Inactivation
l 200 µl AL buffer into a deep well
transfer plate.
l Heat sealed with adhesive foil.
l Pre- heated at + 80ºC 20 mins.
l 100 µl of sample.
l 120 µl of PBS/Protease.
l Heat sealed with foil again.
l + 80ºC 2 x 10 mins (mixed by
inversion).
l Transfer plate out of BSL3 Ag (3%
VENNO® VET solution) to BSL2.
10. www.dpi.nsw.gov.au
Extraction Volumes and Parameters.
EMAI
MagMAX-96
FLI
Qiagen + MagMAX-96
Sample volume 50 µl 100 µl
Lysis buffer 130 µl 200 µl – AL Buffer
Heat No 80 ᵒ C 2 x 10 mins
Protease No 25 µl + 100 µl PBS
Beads 20 µl 20 µl
Lysis/sample/bead mix 5 minutes 4 minutes
Ethanol wash 150 µl x 2 – 2 mins 150 µl x 2 – 75 sec
Isopropanol wash 150 µl x 2 – 2 mins 150 µl x 2 – 75 sec
EluFon buffer 50 µl 80 µl
Mixing speed Slow Fast
Air dry 1 minute 5 minutes
EluFon 4 minutes 1 minute 40 seconds
11. www.dpi.nsw.gov.au
FLI Work Routine
l Inactivations completed → BSL2 →
extractions → PCR.
l 3 days – 3 people = 1442 samples tested.
l Results loaded into LIMS, scrutinized daily,
12. www.dpi.nsw.gov.au
VI & qRT-PCR – plasma (Asia 1)
Because virus could be detected in plasma for a limited period (based on virus
isolation results), qRT-PCR was only attempted on one sample set
0
10
20
30
40
50
60
70
80
90
1 2 3 4 5 6 7 8 9 10 11 12 Total
Number
positive
Day post infection
VI and qRT-PCR on plasma - sheep infected with Asia 1
VI +ve
PCR +ve
13. www.dpi.nsw.gov.au
qRT-PCR testing of oral swabs
qRT-PCR detected FMDV RNA in oral swabs from a high
proportion of sheep throughout the 31 day study period
0
2
4
6
8
10
12
14
16
18
20
1 2 3 4 5 6 7 8 9 10111213141516171819202122232425262728293031
Number
positive
Days post infection
VI & qRT-PCR on oral swabs - Sheep Asia 1
VI +ve
PCR +ve
14. www.dpi.nsw.gov.au
qRT-PCR testing of oral swabs
After day 10 little change in Ct values detected in the
FMDV qRT-PCR over the 31 day study period
0
5
10
15
20
25
30
35
40
45
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31
Ct
Day post infection
Ct values in oral swabs
Mean Ct +ves
No +ve
Range - high
Range - low
15. www.dpi.nsw.gov.au
qRT-PCR – pooled oral swabs
l Pooling simulated by diluting individual
positive samples in pooled RNA extract of
oral swabs from Day 0
l Samples diluted for first day infection
detected
l Pooling limited to 10 samples for practical
reasons (little advantage from larger pools)
l All positive samples detected in pool of 10
l Ct values from pool of 10 samples not
proportional to predicted results for highly
efficient assay (1/10 result frequently <3.3
Ct higher than undiluted sample
l No opportunity to investigate aberrant
results
Sheep Undiluted 1/3 1/5 1/10
1 24.49 25.77 26.56 27.17
2 30.59 31.78 32.43 33.15
3 35.44 37.23 38.42 38.01
4 28.04 30.38 30.35 31.29
5 34.66 35.66 35.73 36.01
6 26.14 27.67 28.23 29.04
7 30.54 31.97 32.52 33.54
8 26.13 27.20 27.97 28.66
9 40.27 Neg Neg Neg
10 36.48 37.81 37.60 40.01
11 34.42 35.37 35.76 36.62
12 32.49 34.00 34.27 34.47
13 34.03 34.86 35.54 37.00
14 34.84 35.34 36.52 37.46
15 33.57 33.08 34.86 35.99
16 28.91 30.33 30.07 31.23
17 32.14 32.03 34.08 34.92
18 31.03 Neg 32.46 Neg
19 36.62 38.08 38.14 39.03
20 26.24 27.26 28.04 28.70
Day 2 post infection
16. www.dpi.nsw.gov.au
qRT-PCR – pooled oral swabs
Sheep Undiluted 1/3 1/5
1 36.00 37.34 37.72
2 Neg NT NT
3 37.32 38.64 38.66
4 36.16 37.71 37.39
5 38.99 39.07 39.8
6 40.01 NT NT
7 37.01 38.02 39.24
8 34.86 36.58 37.27
9 30.84 32.35 32.89
10 35.24 36.87 37.1
11 39.06 39.37 38.6
12 34.79 33.1 36.73
13 30.50 37.26 33.64
14 36.27 NT NT
15 41.01 Neg Neg
16 34.03 36.02 35.95
17 30.62 32.17 32.85
18 36.00 36.79 37.12
19 Neg NT NT
20 36.61 39.38 38.43
Day 28
l Samples diluted to 1/5 for samples near end
of sampling period;
l Day 28 chosen to give maximum number of
positive samples (little day to day change)
l Pooling limited to 5 samples - larger pools
less likely to detect infection??
l All samples detected in pool of 5 samples
l Samples giving very high Ct values
remarkably consistent after dilution – is
maximum quantity of RNA being detected??
l XIPC remarkably stable
l No opportunity to investigate further
17. www.dpi.nsw.gov.au
qRT-PCR – Internal control
l Due to local logistics, the exogenous internal
positive control was not used in the standard
format.
l The XIPC was still added to samples prior to
extraction
l Very high degree of reproducibility for the XIPC
with individual samples:
99.2% of samples within range (12/1442 failed)
(no opportunity to investigate)
l For pooled samples, all samples within range:
Range 34.03-36.35; Mean 35.05, SD 0.43
18. www.dpi.nsw.gov.au
Impact of buffer combinations
l Pre-project evaluation of the Official protocol indicated a lack of compatibility
between buffers from different kits (cf RLT buffer).
l Results suggest suboptimal extraction and presence of inhibitors (eg blood)
l Possible solutions: standard sample volumes, wash times & elution conditions,
A (PBS) B (blood) A (PBS) B (blood) A (PBS) B (blood) A (PBS) B (blood)
PEV dilution
10^-1 35.44 37.58 no Cq 38.86 34.07 39.01 34.91 39.03
10^-2 40.94 no Cq no Cq no Cq 36.03 no Cq 38.03 35.84
10^-3 37.26 no Cq no Cq no Cq 33.45 no Cq 35.94 no Cq
10^-4 36.33 39.00 no Cq no Cq 33.92 no Cq 34.76 38.93
10^-5 no Cq no Cq no Cq no Cq 35.32 no Cq 34.13 no Cq
10^-6 36.10 no Cq no Cq no Cq 35.73 no Cq 37.53 38.95
10^-7 37.73 no Cq no Cq no Cq 39.20 no Cq 35.00 38.13
10^-8 39.13 no Cq no Cq no Cq 37.47 no Cq 37.23 38.17
AL Buffer-FLI extraction AL Buffer into MMX Modified + 50uL elution Modified + 80uL elution
19. www.dpi.nsw.gov.au
FMDV project challenges & next steps
l Results on pooled samples suggest suboptimal
amplification of RNA
l Need to evaluate effects of heating and compare
alternative time/temperatures
l Compare standard EMAI extraction protocol with
modified FLI-EMAI protocol
l Need to re-evaluate FMDV inactivation with
standard lysis buffers with/without heating at lower
temperatures
20. www.dpi.nsw.gov.au
The FMD Research Team
- CVI Lelystad, The Netherlands
Aldo Dekker, Phaedre Eble
- Institute of Diagnostic Virology,
Friederich Loeffler Institute, Insel Reims, Germany
Holger Scholten, Anja Schultz, Kerstin Wernike, Martin Beer, Bernd Haas
- Virology Laboratory, EMAI
Rodney Davis & Peter Kirkland.
Funding: NSW DPI, McGarvie Smith Animal Health Trust, MLA Donor Company