The organism most commonly causing genital filariasis in most part of Bihar and eastern U.P. is-: (A) Wuchereria bancrofti, (B) Brugia malayi, (C) Onchocerca volvulus, (D) Dirofilaria
Answer is A. The nocturnal periodic strains of Wuchereria bancrofti is most wide spread in India.
Mainly along seacoast and riverbanks.
Heavily infected areas – Uttar Pradesh, Bihar, Andhra Pradesh, Orissa, Tamil Nadu, Kerala and Gujarat