Biofilm forming in S. Pseudintermedius isolates from atopic dogs

Abstract

S. pseudintermedius is the main colonizer of skin in dogs, with increased adherence in the ones suffering from atopic dermatitis. It is also the main pathogen involed in pyodermas and has an important zoonotic potential. Biofilm forming was tested using the microtitre plate protocol for 50 S. pseudintermedius sampled from the same number of atopic dogs. Out of these 50 isolates 40 (80%) were methicillin susceptible and 10 (20%) methicillin resistant. S. pseudintermedius isolates sampled from atopic dogs without pyoderma simptoms did not manifest an important biofilm production. Our results show that 60% of all isolates were not biofilm producers, 38% were weak biofilm producers and only one isolate was a moderate biofilm producer. Adherence capability did not show significand differences between MSSPs (methicillin susceptible S. pseudintermedius) and MRSPs (methicillin resistant S. pseudintermedius).