Bacillus licheniformis Bacteremia: Five Cases Associated with Indwelling Central Venous Catheters

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Abstract
Bacillus species are being more frequently recognized as pathogens in immunocompromised hosts or in patients with cancer and central venous catheters. Only nine cases of Bacillus licheniformis infection have been reported in the English-language literature since 1966. In a retrospective study we describe six patients and 17 episodes of B. licheniformis bacteremia over a 5-year span. All six patients had either a Hickman or a Broviac catheter in place for more than 3 months. Five of the six patients had multiple clinically significant episodes of bacteremia due to B. licheniformis. The six patients ranged in age from 4 years to 62 years. Two patients had leukemia or lymphoma and three patients had solid tumors, but only one patient was neutropenic. No deaths were related to B. licheniformis bacteremia. B. licheniformis should be considered as a potential pathogen in immunocompromised patients, especially when bacteremia is associated with the presence of long-term central venous catheters. Mortality due to B. licheniformis bacteremia is low, but recurrent bacteremia due to this organism causes significant morbidity and usually necessitates removal of the catheter.

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