Aeromonas abscess in an immunocompromised child.

An 11-year-old immunocompromised child developed cellulitis and abscess due to Aeromonas hydrophila at the site of bone marrow aspiration after swimming in a freshwater lake. The patient required treatment with intravenous antibiotics and surgical debridement to eradicate the infection. Both common and unusual organisms may complicate infections at the sites of percutaneous procedures.