[Study of the possibility of breeding serologically negative animals from a breeding farm infected with serotype 2 Actinobacillus pleuropneumoniae].

Two sanitation trials showed that it was possible to rear serologically negative animals from pigs on a breeding farm infected with Actinobacillus pleuropneumoniae serotype 2. This was achieved by the medication of sows and piglets during the farrowing-house period and by isolating the piglets from the infected stock of pigs immediately after weaning. Medication of the sows consisted in administering sulphamethoxazole-trimethoprim in the drinking water for a period from five days before to eight days after farrowing. The piglets were treated by injections of sulphadoxine-trimethoprim on days 3, 10, 17 and 24.