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Medical Academy named after S.I. Georgievsky CFU . Biological bases of parasism
Содержание
- 1. Medical Academy named after S.I. Georgievsky CFU . Biological bases of parasism
- 2. Entamoeba Histalytica
- 3. Слайд 3
- 4. Слайд 4
- 5. MORPHOLOGYThe trophozoites are 20-30 µm in diameter
- 6. Слайд 6
- 7. CYST MORPHOLOGYCysts are typically found in formed stool,
- 8. Слайд 8
- 9. Слайд 9
- 10. Слайд 10
- 11. LIFE CYCLEInfection by Entamoeba histolytica occurs by ingestion of
- 12. Слайд 12
- 13. Слайд 13
- 14. PATHOGENECITYEntamoeba histolytica, a protozoan parasite, is the
- 15. DISEASEEntamoeba histolytica is an anaerobic parasitic amoebozoan,
- 16. DIAGNOSISA single stool examination has a low
- 17. TREATMENTTo treat invasive amebiasis, metronidazole (Flagyl, MetroGel, Noritate) is
- 18. PREVENTION and CONTROL Improved sanitation will help to
- 19. Слайд 19
- 20. THANKS FOR YOUR ATTENTION
- 21. Скачать презентанцию
Entamoeba Histalytica
Слайды и текст этой презентации
Слайд 1Medical Academy named after S.I. Georgievsky CFU
.
Biological bases of
parasism class Sarcodina
ma’am
Слайд 5MORPHOLOGY
The trophozoites are 20-30 µm in diameter and contain a
vesicular nucleus with a central endosome, peripheral chromatin and radial
achromatic fibrils (imparting a 'cart-wheel' appearance). The cysts are spherical measuring 10-15 µm in diameter and have 4 nuclei.
Слайд 7CYST MORPHOLOGY
Cysts are typically found in formed stool, whereas trophozoites are
typically found in diarrheal stool. Infection with Entamoeba histolytica (and E.dispar) occurs
via ingestion of mature cysts from fecally contaminated food, water, or hands.
Слайд 11LIFE CYCLE
Infection by Entamoeba histolytica occurs by ingestion of mature cysts (2)
in fecally contaminated food, water, or hands. Excystation (3) occurs
in the small intestine and trophozoites (4) are released, which migrate to the large intestine.
Слайд 14PATHOGENECITY
Entamoeba histolytica, a protozoan parasite, is the etiologic agent of
amoebiasis in humans. It exists in two forms—the trophozoite which
is the active, dividing form, and the cyst which is dormant and can survive for prolonged periods outside the host. In most infected individuals the trophozoites exist as commensals.
Слайд 15DISEASE
Entamoeba histolytica is an anaerobic parasitic amoebozoan, part of the
genus Entamoeba. Predominantly infecting humans and other primates causing amoebiasis,
E. histolytica is estimated to infect about 35-50 million people worldwide. E. histolytica infection is estimated to kill more than 55,000 people each year.
Слайд 16DIAGNOSIS
A single stool examination has a low sensitivity of detecting
the parasite . The best diagnostic method is detection of E. histolytica antigen or
DNA in stool . Clinical diagnosis of amebiasis is difficult because of the nonspecific nature of symptoms
Слайд 17TREATMENT
To treat invasive amebiasis, metronidazole (Flagyl, MetroGel, Noritate) is recommended even for
amoebic liver abscesses (up to 10 cm sized abscesses). Tinidazole
(Tindamax) is FDA approved for treatment of both intestinal or extraintestinal (invasive) amebiasis.
Слайд 18PREVENTION and CONTROL
Improved sanitation will help to reduce the liklihood of
transmission. Travelers to endemic areas can reduce the risk of
infection by drinking bottled water, not using ice cubes in drinks, and washing fruits and vegetables with clean water (or by peeling them yourself).
