W05_07 parasitology: protozoa

Question 1

what is mutualism?

Answer 1

both organisms benefit in a host-parasite relationship

Question 2

what is commensalism?

Answer 2

one organism benefits, the other is neutral

Question 3

how are protozoa categorized?

Answer 3

by their movements

Question 4

what are the 4 classes of protozoa?

Answer 4

amoeba;
flagellates;
ciliates;
apicomplexans

Question 5

how do amoeba move?

Answer 5

pseudopodia

Question 6

how do apicomplexans move?

Answer 6

gliding

Question 7

how does the host respond to protozoal infections?

Answer 7

cell-mediated immunity;
macrophages produce ROS and NO;
humoral response can directly attack protozoa or stimulate immune cells

Question 8

painless ulcer on presentation. violaceous border. moist, granular base. travel history to south america. diagnosis?

Answer 8

cutaneous leishmaniasis;

also microbial or fungal

Question 9

life cycle of leishmania?

Answer 9

vector-borne, indirect. has multiple forms - room temp in the sandfly, 37C in the human

Question 10

what’s the long-term extreme disease of leishmaniasis?

Answer 10

midface tissue destruction

Question 11

how to diagnose leishmaniasis?

Answer 11

get DNA from the skin and test it. note that many things look like cut. leishmaniasis

Question 12

definitive host of p.falciparum?

Answer 12

mosquito

Question 13

intermediate host of p.falciparum?

Answer 13

human

Question 14

how to diagnose malaria?

Answer 14

blood film smear w/giemsa stain, antigen detection, PCR