[Trials in the therapy and prevention of sheep nose bots].

Comparative experiments were carried out on the effectiveness of some antiparasitic agents for the treatment and prophylaxis of estrosis in sheep. An evaluation is made of all methods applied in the modern technologies of sheep raising. It was found that the method of fumigation of airtight premises using negouvon at the rate of 0.6 g/m3 and a 60-min exposure was adequate and effective for group treatment. Negouvon proved to be well tolerated by sheep and had no essential effect on the level of cholinesterase. The use of the preparation ranid is economically justified only with animals having a mixed infection of Fasciola hepatica and O. ovis larvae.