Abstract

A total of 90 Bordetella bronchiseptica strains isolated from the nasal cavities of pigs in 1988 were examined for susceptibility to 13 antibacterial drugs. The rates of resistance to each doug were as follows: trimethoprime, 91.1%; sulfadimethoxine, 88.9%; trimethoprime+sulfadoxine (ST), 75.6%; ampicillin, 13.3%; streptomycin, 11.1%; chloramphenicol, 3.3%; nalidixic acid, 2.2%; and tetracycline, 1.1%. No strains showed resistance to kanamycin, gentamycin, colistin, rifampicin or enrofl oxacin.

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