Lung Abscess due to Clostridium baratii Infection in a Patient with Invasive

Clostridial pleuropulmonary infections are rare; most of these infections are attributed to Clostridium perfringens (1), and none involving C. baratii have been reported. We describe here a fatal case of C. baratii lung abscess superimposed on invasive pulmonary aspergillosis. A 47-year-old man was diagnosed with myelodysplastic syn-drome with refractory anemia and excess blasts in December 2005. The disease course was complicated by disseminated Mycobacterium avium complex infection and invasive pulmo-nary aspergillosis. The patient underwent allogeneic hemato-poietic stem cell transplantation in May 2006. One year later, he was admitted for leukemia relapse associated with febrile neutropenia. Chest radiography and computed tomography (CT) displayed multiple small opacities on the right upper and lower and left upper lung fields. Compared with chest C