THE CONTROL OF STOMACH-WORM INFECTION IN YOUNG CATTLE*

Study of the epidemiology of parasitic gastro-enteritis in calves suggested that control measures should consist of moving calves in mid-July to pastures not grazed by cattle since the winter and at the same time giving them adequate anthelmintic treatment in order that they should not contaminate the new pasture. Controlled trials are described in which calves managed according to these proposals made far better weight gains than comparable calves remaining on the same pasture throughout the season. Observations made in different parts of the country suggest that the same measures may be widely applicable. Possible causes of failure are discussed.