Visceral flukes - Fasciolopsis buski

Question 1

F. buski is the

Answer 1

Largest trematode

Question 2

Ventral sucker vs oral sucker

Answer 2

Ventral sucker is much larger

Question 3

Eggs pass out in _____ and must reach ____ for further development

Answer 3

feces

water

Question 4

F. buski adults live in

Answer 4

small intestine

Question 5

_____ emerge from the daughter rediae _____ after miracidial penetration

Answer 5

Cercaria

4-7 wk

Question 6

______ reenter water & encyst as ______ on aquatic plants

Answer 6

cercaria

metacercaria

Question 7

Humans are infected when:

Answer 7

contaminated vegetation is eaten

Question 8

An adult may lay about ____ eggs

Answer 8

25,000

Question 9

______ excyst in the _______ and develop to sexual maturity in about ___

Answer 9

Metacercaria
small intestine
4 weeks

Question 10

Adult lives for

Answer 10

~ 6 months

Question 11

Reservoir hosts include:

Answer 11

pigs, dogs, and rabbits

Question 12

Symptoms after heavy infection:

Answer 12

nausea, diarrhea and severe intestinal pains

Question 13

Worms cause damage to the:

Answer 13

mucosa via inflammation, ulceration, and abscesses at the site of attachment with their large ventral sucker

Question 14

Diagnosis

Answer 14

recovery of eggs in the feces, or occasionally by examination of whole worms vomited or passed in feces

Question 15

Treatment

Answer 15

Praziquantel

Question 16

Prevention and control

Answer 16

Water vegetables should be carefully peeled and washed

Boiling is effective

Human feces should be treated before being used as fertilizer in ponds

Pig feces should be kept away from ponds.

Pigs should not be fed freshwater plants without their being dried first