Antibiotic susceptibility of canine Bordetella bronchiseptica isolates

Canine_Bordetella_bronchiseptica

The antimicrobial sensitivities of 78 (1995–1998) canine isolates of bronchiseptica from 13 separate sources were determined. Minimum inhibitory concentrations were assessed using the E-test method or by agar dilution. All 78 isolates were sensitive to tetracycline, doxycycline, enrofloxacin, and amoxycillin/clavulanic acid; the majority were sensitive to ampicillin (63/78; 81%), trimethoprim (57/78; 73%), and sulphadiazine (63/78; 81%).

Plasmids in Bordetella bronchiseptica

Plasmids were detected in 14 out of the 24 isolates tested. There was no correlation between the presence of plasmids and , but there was some correlation between the presence of plasmids and the origin of the isolates. Three sizes of plasmid were found: 20, 14, and 5.5 kb. Eight of the isolates contained all three plasmids, the remainder one or two. Thirteen isolates demonstrated ß-haemolysis, of which six produced a soluble haemolysin. Except for one isolate, haemolysin production correlated with plasmid carriage.

Authors: A. Speakman et al. Reference.

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