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OJVRTM
Online Journal of Veterinary Research©
(Including Medical
and Laboratory Research)
Established 1994
ISSN 1328-925X
Volume
29 (2): 108-113, 2025.
Antimicrobial resistance in Staphylococcus intermedius
from dog bite wounds
Faculdade
de Medicina Veterinária, Universidade Técnica de Lisboa, Lisboa, Portugal
ABSTRACT
Oliveira M, Mouro S, Niza
M, Lobo Vilela
C., Antimicrobial
resistance in Staphylococcus intermedius
from dog bite wounds, Onl J Vet Res., 29 (2):108-113, 2025. Staphylococci are common in wounds and biofilm evades
host defences allowing high antimicrobial concentrations. Seven isolates (43.75%) formed biofilm in vitro but we found no association
between wound infection and biofilm by Friedman’s Test. S. intermedius isolates (n=16)
were collected from 48 untreated wounds in 44 bitten dogs. Lag time between
aggression and sample collection averaged ~42h. From 16 S. intermedius, 9 were obtained from infected and 11 from
non-infected wounds. Seven S. intermedius
formed biofilm of which 5 came from
infected and 2 from non-infected wounds. From 9 bacteria without biofilm, only 1
came from an infected wound. Six isolates were found to be 100 % susceptible to
all antibiotics whereas 10 were 6-43% resistant to ampicillin, penicillin, clindamycin,
tetracycline or gentamycin.
Keywords: antimicrobial resistance; biofilm; dog-to-dog bite wound; Staphylococcus intermedius; wound infection.
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