This document describes culture methods for cultivating various protozoan parasites. It discusses the purposes of culturing parasites, including for diagnostic, research, and teaching purposes. It provides examples of parasite species that can be cultured, such as Entamoeba histolytica, Giardia lamblia, and Plasmodium spp. The document outlines different types of culture media, including xenic, polyxenic, monoxenic, and axenic cultures. It also describes specific culture media and methods used for cultivating intestinal protozoa like amoebae, as well as haematozoan parasites including Leishmania and trypanosomes.
LUMEN DWELLING FLAGELLATES - GIARDIA
REFS:
INTERNATIONALLY ACCEPTED BOOK OF MEDICAL PARASITOLOGY BY K. D. CHATTERJEE
TEXT BOOK OF MEDICAL PARASITOLOGY BY PANIKER
IMAGE SOURCES : FROM INTERNET
LUMEN DWELLING FLAGELLATES - GIARDIA
REFS:
INTERNATIONALLY ACCEPTED BOOK OF MEDICAL PARASITOLOGY BY K. D. CHATTERJEE
TEXT BOOK OF MEDICAL PARASITOLOGY BY PANIKER
IMAGE SOURCES : FROM INTERNET
It has been developed for the detection, enumeration & identification of bacteria & yeasts in clinical specimens.
It is an instrument used for automatic computer-assisted identification of bacteria
It mainly involves staining, motility test, cultural characteristics, a series of biochemical tests.
The automatic bacteria identification system automatically identifies the bacteria in very short time.
Specimens for bacteriology investigation should be forwarded as soon as possible to the laboratory in leak-proof, sterile containers.
Neutral glycerol saline should be added to stool sample if there is any delay before laboratory examination.
Complete early morning urine specimen (250 ml), for diagnosis of renal tuberculosis.
Plain tube (blood) for serology.
Blood clot may be cultured by adding a selective culture medium, e.g., for enteric organisms.
Blood for blood culture (blood culture bottle, liquid, 5 to 19ml, 50 ml). The blood is injected by insertion of syringe needle through a hole in the cap and through the central rubber or plastic liner. Don’t remove the cap. Blood culture at RT, not more than 12 hrs.
For serous fluids collection (pleural fluid), universal container is used.
Sputum collected in wide-mouthed disposable container.
It has been developed for the detection, enumeration & identification of bacteria & yeasts in clinical specimens.
It is an instrument used for automatic computer-assisted identification of bacteria
It mainly involves staining, motility test, cultural characteristics, a series of biochemical tests.
The automatic bacteria identification system automatically identifies the bacteria in very short time.
Specimens for bacteriology investigation should be forwarded as soon as possible to the laboratory in leak-proof, sterile containers.
Neutral glycerol saline should be added to stool sample if there is any delay before laboratory examination.
Complete early morning urine specimen (250 ml), for diagnosis of renal tuberculosis.
Plain tube (blood) for serology.
Blood clot may be cultured by adding a selective culture medium, e.g., for enteric organisms.
Blood for blood culture (blood culture bottle, liquid, 5 to 19ml, 50 ml). The blood is injected by insertion of syringe needle through a hole in the cap and through the central rubber or plastic liner. Don’t remove the cap. Blood culture at RT, not more than 12 hrs.
For serous fluids collection (pleural fluid), universal container is used.
Sputum collected in wide-mouthed disposable container.
Animal Cell Culture: Growth of animal cells in culture. PHARMACEUTICAL MICROB...Ms. Pooja Bhandare
PHARMACEUTICAL MICROBIOLOGY (BP303T)Unit-VPart-4
Animal Cell Culture: Growth of animal cells in culture.
Introduction: Histroy, The culture media used for animal cell culture are classified as,
Natural, Artificial, Synthesized
Natural Culture Media:
a. Blood Plasma:
b. Blood Serum:
c. Tissue Extracts:
Artificial Media
Some common examples of artificial media are,
Minimal Essential Medium (MEM),
CMRL 1066,
RPMI 1640.
Synthetic media re classified as,
Serum Containing Media.
Serum Free Media.
a. Serum Containing Media:
b. Serum Free Media:
Physicochemical Parameters needed for growth animal cell culture:
General procedure for cell Culture.
Isolation of the tissue:
Disaggregation of the Tissue:
Mechanical disaggregation
b. Enzymatic Disaggregation
. Trypsin based disaggregation or trypsinization:
Warm trypsinization:
Cold trypsinization:
Drawbacks of trypsin disaggregation:
B. Collagenase based disaggregation:
C. Chelating Agents:
3. Seeding of Culture:
The main purpose of these slides is to convey information to the Professors, Lecturers, and Students. These slides contain authentic information about this topic which is mentioned in that.
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
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
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.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
2. CULTURE METHODS
• In most of the parasitic infections, culture is not a routine identification
technique.
• Very few clinical laboratories offer specific culture techniques for parasites..
• Parasite cultivation is a tricky task, which requires expertise and knowledge of
all kinds of microbiological cultures.
• It is sometimes employed for accurate identification of the parasite species.
• It is more often employed for obtaining large yields of the parasite as a source
of antigen, animal inoculation, drug sensitivity testing, experimental or
physiological studies, and teaching purposes.
3. Purpose or Uses of Culture for Parasites
• For the diagnostic of parasites in sample.
• Serological study
• For the research purpose
• Maintaining the strain of parasites
• Preparation of antigen
• Epidemiological study
• For the teaching purpose
5. Types of Culture media
• Xenic culture - It refers to culture of parasites grown in association with other
unknown microbial associates, for example stool specimens cultured for E.
histolytica in National Institute of Health medium (NIH). Microbial associates are
known to provide various nutrients required for the growth of parasites. All microbial
associates, however, are not beneficial. It is used for primary growth of parasites.
• Polyxenic culture - Cultivation of parasites in associates with many known
microorganisms.
• Monoxenic culture - If the parasites are grown with a single known bacterium, the
culture is referred to as monoxenic, for example corneal biopsy specimens cultured
with Escherichia coli as a means of recovering species of Acanthamoeba. It can be
used for primary growth as well as a transitional phase in isolation.
• Axenic culture - It is a pure culture without any bacterial associate or any other
metabolizing cells. It is mainly used as isolation medium for the parasites, but can be
used for primary growth also, for example TYI-S-33 medium in case of T. vaginalis. It
is very difficult to achieve and maintain in the laboratories.
• Axenic cultures was first developed by Diamond in 1961. Axenic cultivation has
enabled precise antigenic and biochemical studies on amoebae.
6. Cultivation of Amoebae
1. Balamuth’s Aqueous Egg Yolk Infusion Medium:
• This medium is used to detect the presence of amoebae.
• The specific solutions required are phosphate buffer and whole liver concentrate solutions
• Balamuth’s monophasic liquid medium is also used commonly for cultivation of amoebae and
other intestinal protozoa.
• This is an egg yolk-liver extract infusion medium.
Composition of balamuth’s medium
• Liver concentrate powder: 1 part
• Egg yolk medium: 9 parts
Phosphate buffer
A. Tribasic potassium phosphate B. Monobasic potassium
(K3PO4): 212.27 gm Phosphate (KH2PO4): 136.092 gm
Distilled water: 1000 ml Distilled water: 1000ml
7. Cont……
• Mix the solutions in the ratio of 3 parts tribasic (A) to 2 parts monobasic
(B) to make 1 M phosphate buffer stock.
• Dilute the stock buffer to 0.067 M before use (add 492 ml distilled water to
1 lit mPO4 buffer).
Whole liver concentrate solution.
• Liver concentration powder (Wilson or Lilly): 5 gm
• Distilled water: 100 ml
Suspended the power in cold water and autoclave. Filter through a Buchner
funnel to remove, dispense in 10 ml quantities and reautoclave.
8. Procedure for culture of amoebae
• Tubes should contain 6 to 8 ml of fluid and should be incubated for 4
days at 37ᴼC as a sterility check.
• Before inoculation, a loopful of sterile rice power or starch is added to
each tube.
• To each tube, add stool material (about the size of a small pea), break
it up thoroughly in the medium and incubate at 37ᴼC.
• The culture should be checked at 2, 3 and 4 days by examing 0.1 ml of
sediment under the microscope (low intensity light) for characteristic
motility. Although the initial culture may appear to be negative,
subcultures may reveal organisms.
9. 2. Boeck and Drbohlav’s Locke –Egg Serum (LES) medium
• This is another culture medium used to diagnosis of amoebae.
• The medium as used now, is basically an egg slant, with an overlay of
sterile serum or liver extract in buffered saline.
• A loopful of sterile rice powder is added to the medium just before
inoculation with fresh feces or its saline centrifugal sediment.
• Cultures can be obtained from feces containing cysts or trophozoites.
• The cultures are incubated at 37° C and subculture at 48-hour intervals.
• Amoebae can be demonstrated in the liquid phase in unstained mounts or
stained smears.
11. Preparation of complete medium
• Wash 4 eggs, wipe the shells with 70% alcohol, and break the eggs
into a sterile flask containing glass beads.
• Add 50 ml of Locke’s solution and shake until homogenous.
• Dispense the medium so that a slant of 1 to 1 inches is produced in the
bottom of the tube.
• Plug the tubes and place them in a slant position in an inspissator at
70C until the slant solidifies.
• The tubes can then be autoclaved at 15 lb pressure for 20 minutes.
Discard any damaged slants.
12. Cont..
• Prepare a mixture of 8 parts sterile Locke’s solution to 1 part inactivated
human serum.
• Sterilize the mixture by filtration and incubated at 37ᴼC for 24 to 48 hrs as a
sterility check before use. Cover the slants to a depth of 1 cm with the sterile
solution and inoculate in the same manner as for Balamuth’s medium. LES
medium should have a loopful of sterile rice powder added before
inoculation.
• Antibiotics are also added to the medium to inhibit the over growth of
various organisms. These include; penicillin (1000units/ml) streptomycins 2
mg/ml and acriflavine (0.1 ml of 0.02%).
13. Axenic culture for Intestinal Protozoa
• TY-S-33 medium (T: Trypticase, Y: Yeast extract) for E. histolytica
Composition:
• Trypticase
• Yeast extract
• Dextrose
• NaCl
• L cystine HCL
• Ascorbic acid
• K2HPO4
• Ferric ammonium citrate
• Distilled water
14. Culture of Pathogenic Free Living Amoebae
Acanthamoeba Medium
• For the isolation of Naegleria or Acanthmoeba from tissues or soil samples, the following
procedure is recommended.
Prepare page’s Saline
• NaCl: 60 mg
• MgSO4. 7H2O: 2 mg
• CaCl2.2H2O
• Na2HPO4
• KH2PO4
• D/w: 500 ml
• Autoclave 15 psi for 15 min and store in glass bottle at 4 C.
15. • Non nutrient Agar
• Page’s saline: 100 ml
• Difco Agar: 1.5 gm
• Dissolve agar in Pages saline with gentle heating stir or swirl.
• Autoclave at 15 psi for 15 minutes, label deeps with 12 months
expiration date and store in refrigerator.
Plate Preparation
• Melt agar deeps and pour into petridishes as needed. Plates may be
stored in the refrigerator up to 3 months.
16. Culture
• Warm 2 gar plates per specimen in a 37ᴼC incubator for 30 minutes.
• Add 0.5 ml Page’s saline to a slant culture of E. coli.
• Gently scrape surface of a slant and uniformly suspended the bacteria.
• Add 2 to 3 drops of suspension to middle of warm agar plate .
• Spread the bacteria on the agar surface with a bacteriological loop.
• Inoculate 2 to 3 drops of specimen sediment (ground tissue in Page’s
saline or centrifuged CSF) in the center of the agar plate.
• Incubate one plate at 37ᴼC and one at 42ᴼC.
17. Culture examination
• Examine plates every 7 days with 10X objectives; cysts will be visible
within 4 to m days and trophozoites earlier.
• Positive areas of agar can be cutout and placed face down on new
plate coated with bacteria (Culture transfer).
22. Leishmania and Trypanosomes
• NNN medium
• NNN medium was developed by Novy, McNeal and modified by
Nicolle in 1904 for cultivation of Leishmania, is equally satisfactory
for trypanosomes also.
• This is a defibrinated rabbit blood agar medium. Several modifications
of this medium have been introduced.
• NNN Modified Medium is a modification of the original medium and
consists of two phases, blood agar (Part A) and Lockes solution (Part
B).
23. Principle:
• This medium consists of a blood agar base and an overlay medium.
• The blood agar base is a highly nutritious medium that supports the
growth of fastidious organisms like Leishmania and Trypanosoma.
• The specimens are inoculated into the liquid phase of the diphasic
medium and incubated.
• This favours the development of organisms in the insect vector.
• The amastigotes transform to promastigotes in about 24 hours
24. Composition of NNN medium
Part A (Ingredients gms / litre)
• Meat extracts: 3.000
• Peptic digest of animal tissue: 5.000
• Sodium chloride: 8.000
• Agar: 15.000
• Final pH ( at 25°C) 7.3 ± 0.2
Part B (Ingredients gms / litre)
• Sodium chloride: 8.000
• Potassium chloride: 0.200
• Calcium chloride: 0.200
• Monopotassium dihydrogen
phosphate: 0.300
• Dextrose: 2.500
• Final pH ( at 25°C) 7.0 ± 0.2
25. Procedure
Part A:
• Suspend 31 grams in 1000 ml distilled water.
• Heat to boiling to dissolve the medium completely.
• Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes.
• Cool to 45°C and aseptically add 10% sterile defibrinated rabbit or human blood.
• Mix well and dispense in 5 ml amounts in test tubes or 25 ml amounts in flasks.
• Allow tubed media to cool in slanted position.
Part B :
• Suspend 11.2 grams of Part B in 1000 ml distilled water.
• Heat to boiling to dissolve the medium completely.
• Sterilize by autoclaving at 15 lbs pressure (121°C) for 15 minutes.
• Cool and add approximately 2 ml in tubes or 10-15 ml in flasks over solidified Part A medium.
Storage:
• Keep the prepared media refrigerated until it is used (stable for 2-4 weeks) and bring it to room
temperature right before inoculation.
26. • Inoculation:
• Inoculate the specimen (spleen aspiration or bone marrow biopsy or
lymph node aspiration) into the liquid phase of the biphasic medium.
• Incubate at 21-26°C for 4 weeks. Check for the growth of the organism
and for possible fungal contamination after 4 days and continue by 4
days intervals for next 4 weeks.
• Result:
• If positive, luxuriant growth of the organism is seen in the media.
Giemsa stain the culture filtrate and observe under microscope; free,
flagellated, Leishmania promastigote.
27.
28. 2. Schneider’s insect tissue culture medium:
• It is recommended in vitro culture of Leishmania. This medium is said to the more
sensitive than NNN medium.
• Schneider's insect medium has been specially formulated for the in vitro culture of
Drosophila melanogaster cells and tissues.
• A number of cell lines derived from Drosophila melanogaster are now available
and are extensively used in genetic and molecular biology research. Drosophila
cells are also used to study recombinant protein expression.
Composition of Schneider’s insect tissue culture medium
• Schneider’s Drosopihila tissue culture medium: 80 mL
• Fetal calf serum: 20 mL
• Antibiotic-antimycotic solution: 1.2 mL