Protozoal and Helminthic Infections of the Gastrointestinal Tract Flashcards
1
Q
which Protozoa reside in the small intestine
A
G.lamblia
Crypto
2
Q
which Protozoa reside in the large intestine
A
entamoeba histolytica
3
Q
life cycle: c.parvum
A
- asexual and sexual development within host
- ingestion of resistant oocytes
- release of infection infective sporozoites in the small intestine
- invasion of the intestinal epithelium
- division to form merozoites which re-infect cells
- after sexual phase, oocytes released
4
Q
Prevention of Protozoal Infections of the GI Tract
A
- Improved hygiene and water supplies
- Eating only freshly prepared food served hot
- Avoiding salads and fruit which cannot be peeled
- Avoiding tap water and ice cubes
5
Q
what is flies the vector for
A
onchocerciasis
6
Q
what is aedes mosquito the vector for
A
filariasis
7
Q
what is crysops the vector for
A
guinea worm
8
Q
what are snails the vector for
A
Schistosomiasis, Capillaria, Fasciola
9
Q
Space occupying lesions
A
- Eggs in the wrong place
- Cysticercosis causing CSF obstruction
- Ascaris causing intestinal obstruction
10
Q
Cysticercus
A
CSF block
11
Q
Hydatid cyst
A
in the liver
12
Q
Prevention and control of intestinal helminths
A
- Vector control for filariasis
- Meat inspection for cysticercosis
- Sanitation and hygiene for intestinal nematodes
13
Q
Treatment of intestinal helminths
A
• Cestodes –praziquantel
• Nematodes
- albendazole is the most effective of agents
