Clonorchis sinensis Host Identification
The parasitic fluke Clonorchis sinensis, also known as the Chinese liver fluke, requires intermediate hosts to complete its complex life cycle.
The life cycle begins with the egg stage, typically shed in human feces into water. The first organism to ingest the egg must be a suitable freshwater snail. Within the snail, the miracidium hatches and develops through several larval stages (sporocyst, redia) into cercariae.
This snail serves as the crucial first intermediate host. The cercariae are later released from the snail and infect freshwater fish (the second intermediate host), eventually leading to human infection upon consumption of improperly cooked fish.
Based on the life cycle stages, the snail is the initial host required for the development of Clonorchis sinensis.
Important Questions from Metazoan Infections
Which among the following are hepatobiliary flukes (trematodes)?
1. Clonorchis sinensis
2. Mansonella perstans
3. Fasciola hepatica
4. Opisthorchis felineus
Select the correct answer using the code given below:
- Which among the following parasitic helminths is a nematode and has zoonotic transmission?
Which of the following statements are correct in respect of scabies?
1. Male mite Sarcoptes scabiei are commonly transferred from an infected person to a non-infected person.
2. Norwegian scabies occur in immunodeficient patients.
3. Permethrin cream (5%) is used for treatment.
4. Pruritus intensifies at night and after hot shower.
Select the answer using the code given below :
Consider the following statements with regard to cysticercosis :
1. It may present as personality change.
2. Subcutaneous nodule may excised for histology.
3. Cerebral signs commonly do not occur until the larvae die, 5-20 years later.
4. Praziquantel can be given for 10 days.
Which of the statements given above are correct?
Consider the following statements with regard to cutaneous larva migrans :
1. It is one of the commonest linear lesions seen in travellers.
2. It may be associated with a recent visit to a beach.
3. It is non-pruritic.
4. Track moves across the skin at a rate of 2-3 cm/day.
Which of the statements given above are correct?
