Necrotizing fasciitis caused by Haemophilus influenzae type b is a rare infection of the skin and soft tissues. The only previously reported case involved a healthy infant. We report herein the case of an 81-year-old Japanese woman with diabetes mellitus who developed necrotizing fasciitis caused by H. influenzae type b.
CASE REPORTAn 81-year-old Japanese woman presented to the outpatient dermatology department at Kyoto University Hospital with painful swelling of the left leg. She had a history of type II diabetes mellitus and had not previously been vaccinated against Haemophilus influenzae type b. Physical examination revealed swelling, erythema, purpura of the left lower extremity, and hemorrhagic bullous lesions of the left dorsum (Fig. 1). Swelling and erythema spread rapidly to the left lower limb, and she became unconscious 1 h after presentation. The patient was therefore transferred to the intensive care unit.Examination revealed the following: temperature, 36.4°C; heart rate, 132 beats/min; respiratory rate, 24 breaths/min; blood pressure, 107/88 mmHg. Laboratory examinations showed the following: white blood cell count, 3.5 ϫ10 9 cells/liter with 3% segmented cells, 38% band cells, 22% metamyelocytes, 21% myelocytes, 15% lymphocytes, and 1% eosinophils; platelet count, 34,000/liter; prothrombin time, 18.0 s; activated partial thromboplastin time, 42.7 s; fibrinogen, 839 mg/dl; fibrin degradation product, 2.4 g/ml; aspartate aminotransferase level, 23 IU/liter; creatinine level, 4.7 mg/dl; C-reactive protein level, 28.1 mg/dl. Blood gas analysis under room air revealed the following: pH, 7.188; pCO 2 , 31.6 mmHg; pO 2 , 70.7 mmHg; HCO 3 Ϫ , 11.8 mmol/liter; base excess, Ϫ15.2 mmol/liter.