Dignea ( Flukes)

Question 1

Name the(7) characteristics of the Fluke worm

Answer 1

1. Flattened body
2. Nonsegmented and leaf shaped
3. inhabit the intestine or tissues of humans
4. size varies from few mm to cm
5. all adlut flukes have two cup shaped muscular suckers ( oral and ventral sucker)
6. Simple digestive system
7. the body surface can absorb soluble nutrients and release soluble waste products

Question 2

What are the two types of flukes that can infect humans?

Answer 2

1. lives in tissue or intestines - are HERMAPRODITIC

2. Lives unisexual in the abdominal blood vessels known as SCHITOSSMA

Question 3

What is usually known as the intermediate host for parasitic fluke

Answer 3

water snail

Question 4

T/F the larval stage for parasitic flukes goes like this:

1. Metacercaria»»>mircardium»»cercaria as final larvae stage

Answer 4

False

1. miracardium»»cercaria»»>metacercaria as final larvae stage

Question 5

Name the two common ORGAN flukes

Answer 5

1. Fasciolopsis buski ( intestinal fluke)

2. Fasciola bacteria ( sheep liver fluke)

Question 6

Where does the sheep liver fluke normally live in host?

Answer 6

adults live in the bile duct of sheep - does not penetrate bile duct , just moves around and feeds on the bile juice

Question 7

what is the official name of the chinese liver fluke?

Answer 7

Clonorchis sinensis

Question 8

which is the most common known fluke in the US?

Answer 8

the Chinese Fluke

Question 9

what are the two intermediate hosts for the chinese liver fluke

Answer 9

1. snails.

2. fish

Question 10

How do humans get infected by the chinese liver fluke

Answer 10

Humans ingest metacercariae in undercooked fish>larvae hatch and climb into the bile duct where they mature and shed the eggs into the intestinal tract

Question 11

what are some symptoms by the chinese liver fluke

Answer 11

jaundice
hepatomegaly
anorexia

Question 12

this fluke occupies the lungs of reservoir mammals .. mammals release eggs through sputum or feces
also adult are hermaphroditic .. they can release eggs in the lungs…. what is this fluke called?

Answer 12

Paragonimus westermani ( oriental lung fluke)

Question 13

What is the name for Blood Flukes?

Answer 13

Schistosomes

Question 14

what are the 3 species that causes human diseases? (blood Flukes)

Answer 14

1. Schistosoma mansoni
2. Schistosoma japanicum
3. Schistosoma haematobium

Question 15

What is known as the SWIMMER’s itch

Answer 15

Microbilharzia varglandis

Question 16

Definitive Host for swimmer’s itch is humans T/F

Answer 16

False - water fowls, ducks, geese and swans