Microbiology 14: worms/ parasites

Question 1

3 main types of helminths

Answer 1

Cystodes - tapeworms
Nematodes - roundworm
Trematodes - flukes

Question 2

Tania solium egg ingestion vs cyst ingestion

Answer 2

if you eat the eggs, the tapeworm –> brain causing neurocysticercosis .
if you eat the cysts –> GI tract

Question 3

Name of Taenia in pigs vs cows

Answer 3

Taenia solium (pigs) and Taenia saginata (cows)

Question 4

commonest cause worldwide of adult onset seizures

Answer 4

neurocysticercosis

Question 5

definitive hosts of tapeworms

Answer 5

humans

Question 6

treatment and prevention of worms

Answer 6

praziquantel

Question 7

treatment of brain cystsL

Answer 7

albendazole, praziquantel and steroids

Question 8

example of a trematode (fluke)

Answer 8

schistosomiasis

Question 9

where do the schistosomiasis worms develop in the human hsot

Answer 9

worms circulate and develop In the liver

Question 10

where do adult schistosomiasis worms live?

Answer 10

in the blood vessels / mesenteric venues or venous plexus of bladder

Question 11

which schistosomiasis species are in blood vessels and which in bladder?

Answer 11

Blood vessels: S.japonicum + mansoni

BladdeR: S. haematobium

Question 12

animal reservoir of schistosomiassi

Answer 12

snails

Question 13

complications of schistosomiasis

Answer 13

bladder cancer, cirrhosis

Question 14

treatment of schistosomiasis

Answer 14

praziquantel

Question 15

name some examples of nematodes (round worm)

Answer 15

ascaris, strongyloides, hookworm, lymphatic filariasis

Question 16

river blindness

Answer 16

onchocerciasis (type of filaria)

Question 17

leading cause of anaemia in developing world

Answer 17

hookworm