Antimicrobial resistance of isolates recovered from clinically ill nursery pigs and from healthy pigs at different stages of production.

isolates (N = 379) from clinically ill pigs and from healthy pigs were tested for antimicrobial susceptibility using a disk diffusion method. Isolates from clinical cases had a higher prevalence of resistance compared with isolates from healthy pigs. There was a high to moderate prevalence of resistance to antibiotics commonly used in nursery pig diets such as tetracycline (84.

An epidemiological study of serotypes of pigs in Ontario determined by a multiplex polymerase chain reaction.

The purpose of the study was to identify the serotypes of from tonsil swabs in clinically ill and healthy pigs in Ontario using a multiplex polymerase chain reaction (PCR) method. Although 22 different serotypes were identified, most isolates were -like bacteria or untypable.