'Prepatent period' in lymphatic filariasis is defined as the time interval between inoculation of infective larvae and -: (A) Blockage of lymphatics, (B) First appearance of detectable microfilaria, (C) Development oflymphoedema, (D) Development of adult worm
Answer is B. Ans. is 'b' i.e., First appearance of detectable microfilaria o The time interval between inoculation of infective larvae and first appearance of detectable microfilaria is known as "prepatent period". o The time interval from invasion of infective larvae to the development of clinical manifestations is known as the "clinical incubation period" --> It is commonly 8-16 months.