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Flashcards in introduction to parasites Deck (11)
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1

main groups of parasites

protozoa
helminths
arthropods

2

protozoa

microscopic one-celled organisms, can be parasitic or free living

3

parasite

a organism that lives in another organism and gets its food at the expense of its host.

4

diagnostic principles of parasitology

-blood films (malaria)
-histology of biopsy material (schistosomiasis)
-ova, parasites and cysts in faeces eg. tapeworm
- adhesive tape on perianal region (threadworm)
-serology

5

blood-borne parasite examples

-plasmodium spp.
-leishmaniasis
-echinococcus

6

enteric parasitic infections

-amoebic dysentery
-enterobiasis vermiculas (threadworm)
-ascaris lumbricoides
-cestodes (tapeworms)
-schistosomiasis

7

parasite that causes malaria

plasmodium spp. eg. plasmodium falciparum

8

plasmodium life cycle

1. sporozoites injected under the skin by mosquito
2. travel through blood to liver, here they mature to merozoites
3. the parasite then enters red blood cells and multiply causing them to lyse
4. sexual forms taken up by mosquito

9

amoeba dysentery symptoms

diarrhoea with blood and pus. cysts in stool. interstinal and extra intestinal infections. liver abscess in late disease.

10

leishmaniasis symptoms

visceral form:
fever, weight loss and hepato-splenomegaly
cutaneous form:
skin ulceration
muco-cutaneous form:
mucosal ulceration

11

echinococcus symptoms

cyst forms in liver