A 38-year-old woman with no particular medical history was referred to our hospital for low-grade fever and polyarthralgias since 15–20days ago. She revealed a history of contact with cats at home without recent bite or cat scratches although she admitted flea bites. Physical examination was normal without evidence of palpable lymphadenopathies or signs of joint inflammation. Laboratory evaluation showed normal white blood count, an increase in aspartate aminotransferase at 74U/l and alanine aminotransferase at 138U/l; the antinuclear antibodies (ANA) and rheumatoid factor were normal.
