Peer-reviewed veterinary case report
Antibiotic resistance in staph from dog skin pustules and nose
By Pinchbeck, Lauren R et al.·Published in American journal of veterinary research·2007·Department of Veterinary Clinical Sciences, United States·View original on PubMed →
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Original publication title: Pulsed-field gel electrophoresis patterns and antimicrobial susceptibility phenotypes for coagulase-positive staphylococcal isolates from pustules and carriage sites in dogs with superficial bacterial folliculitis.
- Species:
- dog
Plain-English summary
A group of 40 dogs with superficial bacterial folliculitis, which causes pus-filled bumps on the skin, had samples taken from both the bumps and other areas of their bodies. The tests showed that the bacteria causing the infection were mostly the same strain and responded similarly to antibiotics. Almost all the bacteria from the pustules and carriage sites were susceptible to common antibiotics like cephalothin and amoxicillin-clavulanic acid. This means that vets can often choose effective treatments based on just one sample from the infected area.
People also search for: dog skin infection treatment · antibiotics for dog folliculitis · why does my dog have bumps on skin
Abstract
OBJECTIVE: To determine whether coagulase-positive staphylococcal isolates that are genotypically the same strain obtained from pustules and carriage sites of individual dogs with superficial bacterial folliculitis have the same antimicrobial susceptibility phenotype. ANIMALS: 40 dogs with superficial bacterial folliculitis. PROCEDURES: Samples were obtained from 3 pustules and 3 carriage sites (ie, anus, nonlesional axillary skin, and nasal mucosa) for bacterial culture, morphologic identification, Gram staining, catalase and coagulase testing, antimicrobial susceptibility testing, speciation, and pulsed-field gel electrophoresis (PFGE). RESULTS: 223 isolates from pustules and carriage sites were included. Seventeen susceptibility phenotypes were found among isolates. One hundred twenty-eight (100%) isolates from pustules and 95 (100%) isolates from carriage sites were susceptible to cephalothin; 128 (100%) isolates from pustules and 94 (98.9%) isolates from carriage sites were susceptible to amoxicillin-clavulanic acid; 114 (89.1%) isolates from pustules and 82 (86.3%) isolates from carriage sites were susceptible to erythromycin and lincomycin hydrochloride; and 103 (80.5%) isolates from pustules and 70 (73.7%) isolates from carriage sites were susceptible to trimethoprim-sulfamethoxazole. In 37 of 39 (94.9%) dogs, isolates with the same PFGE pattern from multiple pustules had the same susceptibility phenotype. In 21 of 33 (63.6%) dogs, isolates from multiple carriage sites with the same PFGE pattern had the same susceptibility phenotype. CONCLUSIONS AND CLINICAL RELEVANCE: In dogs with superficial bacterial folliculitis, most coagulase-positive staphylococcal isolates from pustules that are genotypically the same strain will have the same susceptibility phenotype and treatment may be based on empiric antimicrobial selection or susceptibility testing of 1 lesional isolate.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/17472455/