Oviductal volvulus in a Nera black chicken (Gallus gallus domesticus) in Nigeria.

A case of oviductal volvulus, a rare disorder with oviductal cyst as a possible aetiology, is described in an 11-month-old Nera black chicken (Gallus gallus domesticus). The condition was observed during routine postmortem examination of 550 carcasses from a flock of 16,100 birds between September 2005 and June 2006. The affected portion of the oviduct and the cyst twisted almost 360 degrees clockwise around the dorsal ligament with severe congestion, hyperaemia, oedema, dilatation and devitalization. This is the first reported case of oviductal volvulus in a domestic chicken.