Charakterystyka gronkowców izolowanych z przypadków otitis externa u psów

The purpose of the work was to identify staphylococci isolated from the cases of otitis externa in dogs. The ma­terial was taken from the external auditory canal of 59 dogs with clinical signs of otitis externa. Of 47 dogs 41 strains of Staphylococcus spp. were isolated, which appeared to be a dominant infectious factor. Out of the strains most of them were classified as Staph, interme- dius (46.3®/o) and Staph, aureus (22.0°/o). All the strains produced a positive coagulase reaction. In contrast, the coagulase negative strains, i.e. Staph, hominis, Staph, hyicus, Staph, cohmi, Staph, haemolyticus, Staph, xylosus occurred rare. The isolated coagulase-positive strains were sensitive to gentamycin and neomycin and had a conside­rable resistance to penicillin, ampicillin and oxytetra- cycline. A vaccine made of the isolated coagulase positive strains proved to be effective in the treatment of chronic otitis externa caused by staphylococci.