Abstract
Piglets were administered with a daily dose of 10 mg of sulfamonomethoxine (SMM) per kg of body weight mixed with feed for 30 days beginning at the time of weaning. At the end of the period of administration the rate of detection of B. bronchiseptica was 6.3% among these piglets and 43.8% among untreated control ones. At the time of shipment the positive rate of agglutinating antibody was 68.8% in the former and 87.5% in the latter. The rate of occurrence of lesions of the nasal conchae was 25.5% in the former and 68.8% in the latter. SMM was concluded to have a preventive effect against swine atrophic rhinitis.
