A Case of Campylobacter Fetus Subspecies Fetus Systemic Infection.

 are gram-negative bacilli commonly known to cause gastro-intestinal infection; however, species like have been documented to cause severe systemic illness, especially in immunocompromised hosts. It has been linked with severe sepsis, septic arthritis, endocarditis, and subdural abscess. We report a case of a 65-year-old male with a history of human immunodeficiency virus infection (HIV) and chronic hepatitis B presenting with high fevers, pain, and swelling in multiple joints. His blood cultures grew . Synovial fluid analysis from the knee joint revealed leukocytes of 17,000 with 93% neutrophils, and gram stains and cultures from synovial fluid were negative. The patient improved with piperacillin-tazobactam and vancomycin which were transitioned to amoxicillin-clavulanic acid and azithromycin as the patient returned to baseline functional status.