Assessment of wound bio-burden and prevalence of multi-drug resistant bacteria during open wound management

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Abstract

Objective:

To describe the bacterial bio-burden of open-treated wounds and make comparisons with bite wounds.

Design:

Retrospective multicentre study.

Sample:

Microbial culture between 2011 and 2013 from open-treated wounds in dogs and cats (initiation of therapy n=88, follow-up n=52) were compared to those from bite wounds (n=184).

Procedures:

Bacteria were identified and tested for antibiotic susceptibility by two accredited laboratories.

Results:

In total, 77/88 (88%) of open-treated wounds yielded positive bacterial cultures at the beginning of treatment, decreasing to 27/52 (52%) during treatment. Upon initial evaluation, 42/88 (48 %) of open-treated wounds were considered infected with multi-drug-resistant bacteria, with a drop to 22/52 (41%) during therapy. Bite wounds yielded fewer positive cultures 88/184 (48%) with only 11/182 (6%) being affected by multi-drug-resistant bacteria. Bacteria found most commonly in open-treated wounds wereEnterococcussubspecies,Escherichia coli, Staphylococcus pseudintermediusandPseudomonas aeruginosa.

Conclusion:

The bacterial populations of open-treated wounds differed markedly from the bite wounds. The high incidence of multi-drug-resistant strains in open wounds highlights the need for alternatives to antibiotics.

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