Rahnella aquatilis bacteremia in an HIV-infected intravenous drug abuser

Rahnella aquatilis, an unusual enteric Gram-negative rod, was isolated from three of four blood cultures of an HIV-infected intravenous drug abuser. The outcome was favorable after a 14-day course with ciprofloxacin. The identification of R. aquatilis isolates is discussed and a synopsis of the previously published antimicrobial susceptibility patterns of this microorganism is given.