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What is A contact carrier in cholera has the following characteristic - and explain in detail?
<p> The duration of contact carrier state is usually less than 10 days. The gall bladder is not infected. It plays an impoant role in the spread of cholera. The stool culture is frequently positive for V. cholera O1. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:230. <\p>