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Microbiology

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Helminth

Question
33 out of 100
 

True about 'Chinese liver fluke':



A Eggs do not float in saturated saline solution

B Intermediate host is man

C Second intermediate host is snail

D Metacercaria is the infective form

Ans. D Metacercaria is the infective form

a. Infection with C. sinensis occurs due to consumption of infected fish containing metacercaria.

b. Clonorchis is a liver fluke that can infect the liver, gallbladder and bile duct.

c. Found across parts of Asia, it is also known as the Chinese or oriental liver fluke.

d. The eggs of Clonorchis sinensis are ingested by a snails in fresh water.

e. After the eggs hatch, infected snails will release microscopic larvae called cercariae that will enter freshwater fish.

f. People become infected when eating the parasite containing cysts called metacercariae within infected raw or undercooked fish.

g. Once ingested, cysts travel to the small intestine and liver where they feed upon the bile created by the liver and mature.

h. The life cycle takes 3 months to complete in humans. Infected people will then pass eggs in their feces or may cough them up.

i. Most signs and symptoms are related to inflammation and intermittent obstruction of the biliary ducts.

j. In severe cases, abdominal pain, nausea, and diarrhea can occur.

k. In long-standing, untreated infections, inflammation of the biliary system can lead to cancer, which can be fatal.

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