Bordetella bronchiseptica and toxigenic type D Pasteurella multocida as agents of severe atrophic rhinitis of swine.

Bordetella bronchiseptica and toxigenic type-D Pasteurella multocida were cultured from pigs in each of five herds diagnosed as having severe atrophic rhinitis (AR). B. bronchiseptica alone, P.

Serologic survey for Bordetella bronchiseptica in Nebraska specific-pathogen-free pigs.

The frequency of Bordetella bronchiseptica infection in Nebraska specific-pathogen-free (SPF) pigs was determined by serologic and bacteriologic cultural analysis. Serum samples from non-SPF herds were tested for comparison. A total of 1,282 of 1,397 (92%) of the SPF pigs tested had antibody to B bronchiseptica; 37 of 220 (17%) were culture-positive, and 67 of 4125 (1.

The effect of feeding Streptococcus faecium upon Escherichia coli induced diarrhea in gnotobiotic pigs.

Streptococcus faecium (Sf) was fed to gnotobiotic pigs to control colibacillosis. Three strains of Escherichia coli (Ec) were used. Strain 0:K103,987p:NM of Ec fed to pigs without Sf developed severe diarrhea which persisted for several days.

Effect of Streptococcus faecium C-68 in control of Escherichia coli-induced diarrhea in gnotobiotic pigs.

Streptococcus faecium was fed to prevent colibacillosis in gnotobiotic pigs. Three strains of Escherichia coli were used. With strain O:K103, 987P:NM in pigs fed S faecium before the E coli challenge exposure, the pigs exhibited less severe diarrhea, recovered earlier, and produced better weight gains than did pigs given E coli only.

Long-term effect of Bordetella bronchiseptica infection in neonatal pigs.

A total of 62 gnotobiotic pigs were inoculated with Bordetella bronchiseptica at 7 days of age. There were 25 noninoculated controls. Thirteen of the inoculated pigs were killed and 6 pigs which died were examined between 3 and 5 weeks after inoculations were done (group A).