Management of Suspected Nosocomial Infection: an Audit of 19 Hospitalized Patients with Septicemia Caused by Bacillus Species

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Abstract
From April to August of 2000, Bacillus spp. were detected in the blood culture of 29 patients in a hospital in Japan. Of these patients, 19 had clinical signs of septicemia; positive culture in the remaining 10 patients was attributed to contamination with skin flora at the site of puncture. Of the 18 strains evaluated, 15 were Bacillus cereus, 2 were Bacillus subtilis, and one was Bacillus licheniformis. The only hospital death observed was that of a patient who had no clinical signs of septicemia at the time of blood sampling. That death is now considered attributable to the underlying neoplasm. The hospital committee for prevention of nosocomial infection concluded after a critical review of the patient records that the cause of septicemia in most cases had been contaminated intravenous lines. To control the situation, the committee recommended the use of a new skin disinfectant, and medical personnel were advised to avoid infusion pauses with interruption of intravenous lines and to replace the caps for the stopcocks with new ones each time the caps were removed. These measures were rigorously observed in addition to the conventional measures for preventing catheter sepsis, and the incidence of septicemia due to the Bacillus spp. declined dramatically thereafter.

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