The Urine Culture Test is performed to detect and diagnose a microbial infection of the urinary tract.
For more information, visit https://www.1mg.com/labs/test/culture-urine-2232
The Urine Culture Test is performed to detect and diagnose a microbial infection of the urinary tract.
For more information, visit https://www.1mg.com/labs/test/culture-urine-2232
Collecting blood samples and other biological specimens is crucial to the understanding, prevention, and treatment of disease. However, from the patient’s perspective, it can also be painful, unnerving, frightening, and inconvenient.
Hospital acquired infections: The different common sources of infection, their routes of spread and the growing antimicrobial resistance. Also includes a discussion on hospital Infection prevention and control guidelines and the universal and standard precautions.
A properly collected and handled specimen is critical to quality test results. Test Information Sheets provide comprehensive instructions, including:
Type of specimen to collect
Collection kit and requisition
Special requirements
Specimen handling
Test methodology and links to relevant Labstracts
Turnaround times
Collecting blood samples and other biological specimens is crucial to the understanding, prevention, and treatment of disease. However, from the patient’s perspective, it can also be painful, unnerving, frightening, and inconvenient.
Hospital acquired infections: The different common sources of infection, their routes of spread and the growing antimicrobial resistance. Also includes a discussion on hospital Infection prevention and control guidelines and the universal and standard precautions.
A properly collected and handled specimen is critical to quality test results. Test Information Sheets provide comprehensive instructions, including:
Type of specimen to collect
Collection kit and requisition
Special requirements
Specimen handling
Test methodology and links to relevant Labstracts
Turnaround times
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
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micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
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This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
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Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
3. Introduction
• Nurses often assume the responsibility of sample
collection – wards
• Proper sample collection and handling ensures
quality and reliable lab results – sample
degradation or compromise
• Necessary for sample collectors to know and abide
by proper sample collection and handling
techniques
4. Specimen collection key
issues
• Consider differential diagnoses
• Decide on test(s) to be conducted
• Decide on clinical samples to be collected to
conduct these tests
• consultation between microbiologist, clinicians and
epidemiologist
5. Specimen collection tubes
1. Ethylenediaminetetra-acetic acid [EDTA]
•Purple top/ lavender top
•Used for:
routine haematology [FBC]
Reticulocyte count
Sickle test
Glyco HB,
Hb electrophoresis
CD 4, thin smear, blood grouping
•Not suitable for Calcium and coagulation
•Invert several times soon after collection
6. Specimen collection tubes
cont…
2. Red top [No clot activator]
•As indicated, has no clot activator – plain
•ALL BODY FLUIDS [CSF, Ascitic, Pleural, lymph
aspirates etc] must be collected in this tube.
•Invert several times soon after collection
7. Sample collection tubes cont…
3. Red top, with clot activator.
•Used for chemistry, crossmatch, serology [VDRL,
Hep B and C]
•Invert several times after collection
8. Specimen collection tube
cont..
4. Blood culture bottles
• Has bacterial growth medium and activated charcoal
• Sample for blood culture is collected directly into BC
bottle
9. Basic sample collection
techniques
A. Venipuncture
• Collection of blood from a vein for various tests that require
large volume sample
• Requires a tourniquet, needle, syringe, disinfectant, cotton
wool, specimen collection tubes.
• Procedure commonly done on a vein in the antecubital fossa of
the arm.
• Can also on a site other than the antecubital fossa where a vein
is visible or can be reached.
• Blood is drawn with a needle after the site has been
thoroughly disinfected, with the bevel of the need facing
upwards.
10. Blood samples – blood for
smears
Collection
Capillary blood from finger prick
• make smear
• fix with methanol or other fixative
Handling and transport
Transport slides within 24 hours
Do not refrigerate (can alter cell morphology)
11. Blood samples – blood for
cultures
Collection
Venous blood
• infants: 0.5 – 2 ml
• children: 2 – 5 ml
• adults: 5 – 10 ml
Requires aseptic technique
Collect within 10 minutes of fever
• if suspect bacterial endocarditis: 3 sets of blood culture
12. Basic sample collection
techniques
• Urine collection
• Wash hands
• Clean meatus, female front to back
• Start stream, then stop, collect specimen
• Aseptic technique
• Bedpan/mexican hat
• To lab 15-20min post collection
• Urine specimens
• Random specimens, mid-stream urine, timed urine,
sterile urine
13. Basic sample collection
techniques
• Stool specimens
• Analysis of fecal material can detect pathological
conditions ie: tumors, hemorrhage, infection
• Tests: OB, ova and parasites, pus
• Use a sterile container to collect stool.
• Applicator sticks, direct collection, stool sample scoop.
• Must reach the lab as soon as possible
14. Basic sample collection
techniques
• Vaginal or Urethral Discharge Specimens
• Normally thin, nonpurulent, whitish or clear, small
in amount
• STD’s, UTI
• Not Delegated
• Assess external genitalia
• If STD record sexual history
• Physician’s order- vaginal/urethral
16. CSF
• Handling and transportation
Bacteria
• preferably in trans-isolate medium,
pre-warmed to 25-37°C before inoculation
OR
• transport at ambient temperature (relevant pathogens
do not survive at low temperatures)
Viruses
• transport at 4-8o
C (if up to 48hrs or -70o
C for longer
duration)
17. Common sample collection
techniques – sputum
Collection
Instruct patient to take a deep breath and cough up
sputum directly into a wide-mouth sterile container
• avoid saliva or postnasal discharge
• 1 ml minimum volume
18. Rejection of samples
• All samples collected in wrong tubes are rejected
• All samples untimely brought to the lab are
rejected
• Unlabeled samples are rejected
• Insufficient samples are rejected
• Compromised samples [haemolysed etc] are
rejected
• If a sample is rejected, the one rejecting it must
indicate the reason for the rejection of the sample.
19. References
• Lieseke CL, E Ziebig; Essentials of Medical
Laboratory Practice, 1st
Edi., FA Davis Company,
Philadelphia, USA [2012]