You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Night blood survey is done in ? and explain in detail?
Ans. is 'a' i.e., Filaria The microfilariae of W. bancrofti and B. malayi occuring in India display a nocturnal periodicity, i.e., they appear in large number at night and retreat from the blood stream during the day. This is a biological adaptation to the nocturnal biting habits of vector mosquitoes. The maximum density of microfilariae in blood is repoed between 10 pm and 2am. When the sleeping habits of the host are altered, a reversal in periodicity has been observed