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Question

The infective stages of Entamoeba, tetranucleated forms can survive for

A
12 hours
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B
1 day
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C
6 day
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D
10 days
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Solution

The correct option is D 10 days
The tetranucleate cysts constitute the transmissive or infective stage. They do not develop further but pass out of the host in the faeces. They can remain alive for 10 days in moist stool. They are very susceptible for dessication and die at the temperature of 50oC.

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