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Streptococcus dysgalactiae polyarthritis in dairy goats
1University of California Veterinary Diagnostic Laboratory, Tulare Branch, CA 93274.
Journal of the American Veterinary Medical Association
|September 1, 1994
Summary
Streptococcus dysgalactiae caused polyarthritis in Saanen goats, showing resistance to tetracycline. Penicillin was effective, highlighting the need for targeted antibiotic therapy in goat arthritis cases.
Area of Science:
- Veterinary Medicine
- Microbiology
- Infectious Diseases
Background:
- Polyarthritis, an inflammatory joint condition, affects various livestock species.
- Saanen goats are a dairy breed susceptible to several health issues.
- Streptococcus dysgalactiae is a known pathogen in young ruminants.
Observation:
- Two Saanen does presented with clinical signs of polyarthritis.
- Microbial cultures from affected joints identified Streptococcus dysgalactiae.
- Antibiotic susceptibility testing revealed resistance to tetracycline but susceptibility to penicillin.
Findings:
- A 2-year period saw 25 Saanen goats diagnosed with polyarthritis on the same farm.
- The isolated Streptococcus dysgalactiae demonstrated tetracycline resistance, complicating treatment.
- Penicillin proved effective against the identified bacterial strain.
Implications:
- Streptococcus dysgalactiae should be considered a significant cause of polyarthritis in adult goats.
- Diagnostic protocols for goat polyarthritis outbreaks should include testing for Mycoplasma, Chlamydia, and caprine arthritis-encephalitis virus.
- Antimicrobial stewardship is crucial, given the observed antibiotic resistance patterns.