Isolation of aerobic bacteria from abscesses and wounds in rabbits and antibiotic susceptibility testing of Staphylococcus spp. and Pseudomonas spp. isolates

Background

Wound infections and abscesses in rabbits are a common problem in veterinary practice and their treatment can be challenging. Bacterial culture and antimicrobial susceptibility testing are important tools in these cases. While some studies are available on bacteria associated with wound infections and abscesses in rabbits, the numbers of animals included is generally limited. Monitoring of antibiotic resistance in clinical practice is also an important part of good antibiotic stewardship. Multiple antibiotic resistances are frequently encountered in Staphylococcus and Pseudomonas spp., 2 groups of bacteria commonly associated with abscesses in rabbits.

Methods

This retrospective study evaluated the results of aerobic bacterial cultures and antibiotic susceptibility tests in swabs from abscesses (A) (n = 541) and from skin and wounds (SW) (n = 308) submitted to a commercial diagnostic laboratory. Samples submitted between January 2017 and October 2020 were included in the study. Antimicrobial susceptibility testing for Staphylococcus and Pseudomonas spp. was evaluated and compared.

Results

In A, 465 bacterial isolates including 35 different species were isolated while 394 bacterial isolates, including 35 different species, were found in SW. The most frequently isolated bacteria were Staphylococcus spp. (A = 21.7%, SW = 36.5%) followed by Pasteurella spp. in A (13.3%) and aerobic spore-forming bacteria in SW (11.2%). Pseudomonas spp. was the third most commonly isolated genus in both sample types (A = 11.6%, SW = 8.9%). Pseudomonas aeruginosa isolated from A were more often resistant to the tested antibiotics than other Pseudomonas species. These results support the need for bacterial culture and antibiotic susceptibility testing in small mammal practice.