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Calves raised in cages in the open air from the age of 12 h for 2-3 months were less susceptible to infection with Dictyocaulus when released on pastures in the Vologoda region, USSR, in May. At the 2 farms under investigation, the rates of infection were 15.0 and 10.0% compared to 75.8 and 82.7%...

Lemekhov, P. A.
Byulleten' Vsesoyuznogo Instituta Gel'mintologii im. K. I. Skryabina, 1988, No. 49, pp 35-36