Muscular abscess caused by Cupriavidus gilardii in a renal transplant recipient

Abstract Cupriavidus gilardii is a rare cause of human infection. We report a muscular abscess on the right thigh caused by this organism in a renal transplant recipient, who had suffered a septic shock associated with an extensive cellulitis caused by Streptococcus pyogenes . The patient was successfully treated with surgical drainage and intravenous ciprofloxacin for 13 days. This is the first time that C . gilardii is isolated from a human abscess. C . gilardii should be considered as a cause of human infection, especially in immunocompromised patients. Infection caused by this organism may be underdiagnosed because the identification is very difficult.