8.15_Parasitics

Question 1

nematodes

Answer 1

round worms

Question 2

cestodes

Answer 2

tapeworms, pathogenic as larva and adult not egg

Question 3

Trematodes

Answer 3

flukes or flatworms, pathogenic whole life

Question 4

Ectoparasites

Answer 4

arthropods, pathogenic as larva and adult not egg

Question 5

Protozoa life stages

1. Trophozoites
2. Cysts

Answer 5

1. motile feeding reproducing

2. none of above, thick walled, survives in environment, good for transmission like spores for fungi

Question 6

Helminth life stages

Answer 6

Egg larva adult

Question 7

Definitive host

Answer 7

host that parasite has reproduction in

Question 8

Intermediate host

Answer 8

host that parasite doesnt do sex in

Question 9

vector

Answer 9

organism that transmits a parasite to a host

Question 10

reservoir

Answer 10

host that serves as a source of parasite transmission to the population of interest

Question 11

Rhabditiform larvae

Answer 11

early stage larva, rod like and not infective

Question 12

Filariform larvae

Answer 12

later stage, threadlike, infective

Question 13

Eosinophils and parasites

Answer 13

these fight infection of a parasite and will often lead to high blood counts of these when infected with helminth

Question 14

hygiene hypothesis

Answer 14

immune systems used to be so worried about parasites, but now with hygiene control they do not have to fight as much and it may actually lead to them turning on themselves and environmental antigens more often…autoimmune and allergies

Question 15

Local intestinal disease (giardiasis)

Answer 15

trophozoite interferes with brush border enzymes and cause issues like diarrhea, nutritional disorders weight loss, failure to thrive

Question 16

Invasive disease (amebiasis)

Answer 16

human ingests a cyst of an amoeba, it activates in colon and then absorbs to liver and leads to abscess, can be passed in liquid and stool