Trematodes - Exam 3

Question 1

common name for trematodes

Answer 1

flukes

Question 2

reproductive characteristics

Answer 2

hermaphroditic, cross-reproduce

Question 3

examples of trematodes

Answer 3

fasciola & alaria canis (batman)

Question 4

structure

Answer 4

flattened, leaf-like, oral & ventral suckers for attachment, genital pore, intestine, ovary, testes

Question 5

final host

Answer 5

adult, environment: egg-miracidium

Question 6

intermediate host

Answer 6

rediae-cercaria (snail)

Question 7

environment

Answer 7

metacercaria (loses tail, found on grasses) - infective stage

Question 8

final host

Answer 8

immature adult (consumes metacercaria in environment)

Question 9

prevention is key because _________ leads to infection

Answer 9

environmental exposure

Question 10

fasciola hepatica life cycle

Answer 10

funny video: eggs in feces, eggs in H2O, miracidia hatch via opercula & penetrate snail, 3 life stages within snail, cercariae on H2O plants, metacercariae on H2O plant ingested by human/sheep/cattle, live in duodenum, adults live in hepatic biliary ducts

Question 11

common name for liver with chronic infection

Answer 11

pipe stem

Question 12

clinical signs

Answer 12

anemia, bottle jaw