PERFORMANCES OF COMMINGLED SEGREGATED EARLY WEANING PIGS IN A TESTING STATION

摘要

Since 1994, the Centre de developpement du porc du Quebec inc. (CDPQ) is operating a testing station as part of its genetic improvement programs. In the present paper we will summarize the growth and health performances of the first ten batches of pigs that were tested. Testing facilities consist in a building with a nursery and a growing-finishing sections both with a capacity of about 400 pigs. The whole building is operated "all in, all out". Piglets originated from 20 to 30 herds. These herds hadquite different health status, most of them being infected with several pathogens such as PRRSV or M. hyopneumoniae (M. hyo). The proportion of infected herds varied from batch to batch. However at the time when the piglets were chosen, the herds had to have been free of clinical signs of significant diseases in the breeding and nursery sections. Sows and nursing piglets received no additional treatment to those regularly chosen and applied by each producer.