Filarial infections in semi-wild cattle of Northeast India: first record of Setaria digitata (von Linstow 1906) in Bos frontalis (Lambert 1804).

The occurrence of adult Setaria digitata, a filarial nematode of bovine host is reported for the first time from mithun (Bos frontalis) of Arunachal Pradesh, India. During December 2011 to March 2012, a thorough survey was undertaken to evaluate the incidence and intensity of helminth infections among semi-wild cattle in Northeast India. During the course of investigation, the relatively uncommon species of Setaria was encountered among two out of eleven mithun examined. Through light and scanning electron microscopy, the nematode is identified as S. digitata.