Dictyocaulosis of sheep in Altai
Distribution and seasonal dynamics of infection of sheep by Dictyocaulus fila-ria in Altai are investigated. The terms of infection lambs by D. filaria are estab-lished. In August the lambs are infected by D. filaria at 51,5 %, young growth at the age of 1-2 years - at 24,1 % and adult sheep - at 15,8 %.