Various species of demodectic mites, affecting the adnexa of skin, have been described to cause clinical form of demodicosis or follicular mange in different species of animals. The disease has not been described very often in cow bulls. In the present study, we recorded demodicosis in newly purchased apparently healthy looking breeding bulls of different breeds following foot and mouth disease (FMD) vaccination. The nodular skin lesions measuring between 0.5–3.0 cm were recorded after 5 days of FMD vaccination. These lesions were distributed all over the head down to brisket and shoulder regions. In a few bulls, the lesions were also noticed over the hind quarters. The gross skin lesions were mucous head type, brownish nearly circular nodules. Histopathological findings demonstrated acanthosis and cystically dilated keratinized hair follicles filled with debris and cut sections of parasites. Dermis showed chronic cellular infiltrate in the connective tissue. The skin scrapings also demonstrated
Demodicosis, Mite infection, Breeding bull, Vaccination stress
