Clinical and postmortem specimens in the forms of warts, scabs, faeces, trachea and lungs fromsuspected cases of bovine papilloma, contagious ecthyma of goat, fowl pox, calf diarrhoea and avian infectious bronchitis were submitted for laboratory diagnosis. Examination by electron microscopy revealed coronavirus-like particles in the faeces of a calf with diarrhoea and in the allantoic fluid of embryonated eggs infected with materials from a fowl suspected of infectious bronchitis. Poxvirus-like particles were observed from the scab of a goat with clinical symptoms of contagious ecthyma and also from the scab of a chicken suspected of fowl pox. Parvovirus-like particles were detected from the faeces of a dog with diarrhoea. Examination of warts from two different cattle, both clinically diagnosed as bovine papilloma, revealed different results. In one case only papilloma virus was present while in the other, both papillomavirus and poxvirus-like particles were present.