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