Summary
The purpose of this study was to describe four dogs that developed polyarthritis (PA)
shortly after vaccination.
Between 1996–1999, 27 dogs were admitted to the Clinic for Small Animals, University
of Berlin with clinical signs of PA. Based on the history, clinical findings, results
of routine laboratory tests, radiography and ultrasonography, synovial fluid analysis,
serum titers for rheumatoid factors, infectious disease and immunological serum titers
nine dogs were diagnosed with idiopathic PA type I and 14 dogs with other forms of
polyarthritis. Vaccine-associated PA (VAPA) was suspected in four dogs of different
breeds (1.3–2.4 years old) which showed a sudden onset of lameness with several painful
and swollen joints three – 15 days (mean 11) after vaccination. Synovial fluid analysis
revealed nucleated cell counts ranging from 4,000-72,000/μl (mean 30,000) with 30–90%
(mean 80) neutrophils. Treatment consisted of NSAIDs and doxycycline. The VAPA dogs
quickly recovered in one to two days, three had not experienced a recurrent arthritic
episode, one dog developed arthritic signs 12 days after revaccination. An accurate
vaccination history is important on all dogs presenting with PA. In accordance with
anecdotal reports the signs of disease in VAPA can spontaneously resolve.
Keywords
Polyarthritis - vaccine-associated - outcome