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KMID : 1094020210380050225
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Journal of Veterinary Clinics
2021 Volume.38 No. 5 p.225 ~ p.230
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Maxillary Sinusitis by Staphylococcus aureus Infection in a Thoroughbred Gelding: Case Report
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Lee Sang-Kyu
Lee In-Hyung
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Abstract
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A 4-year-old gelding Thoroughbred racehorse, which had been undergoing antibiotic therapy at a local veterinary clinic, was referred to the KRA veterinary center with a 20-day history of continuous right nasal discharge. Patient’s history, endoscopic examination, and radiographic examination revealed primary maxillary sinusitis. Under sedation, surgical intervention was performed to collect samples and remove the accumulated mucopurulent exudate in the sinus. Swab samples were collected from the sinus during surgery for cytology and antimicrobial susceptibility testing. Only one type of bacteria was cultured, and molecular analyses of 16S ribosomal RNA gene sequences identified it as Staphylococcus aureus(S. aureus). The isolate was resistant to multiple antibiotics, which are frequently used in equine practice. Trimethoprim-sulfamethoxazole was chosen based on antibiotic susceptibility test, trephination, and sinus lavage using saline were applied to treat bacterial sinusitis. The clinical signs improved after 1 month and the patient resumed training. This report describes S. aureus isolated from bacterial maxillary sinusitis in a horse and its antibiotic susceptibility.
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KEYWORD
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sinusitis, horse, Staphylococcus aureus, parasinus, antibiotic susceptibility
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