Bacterial croup caused by Pasteurella haemolytica.

We report a case of bacterial croup caused by Pasteurella haemolytica. A nine-month-old girl was admitted to our hospital because of abrupt onset dyspnea and unconsciousness. From clinical and laboratory findings, she was diagnosed as having bacterial croup. Pasteurella haemolytica was recovered from her tracheal secretion on admission. To our knowledge, this is the first report of bacterial croup caused by P. haemolytica.