Undetected Bacillus pseudo-outbreak after renovation work in a teaching hospital

Abstract

word count: 199 words Text body word count:2491 words -1- We found more Bacillus cereus isolates from blood samples in 2004 compare to the preceding years. Swab samples were collected in the particular ward from the surface of a working desk, filter unit of the air-conditioners, entrance of air inlet ducts, exit of the air outlet ducts and three-way valves of the particular ward under the consideration of iatrogenic contamination. Towels and gowns used in the ward were examined. Undetected Bacillus Pseudo-Outbreak after Renovation WorkDens dust was noted in the filter of the air-conditioner and inlets/outlets of the air-ventilation system of the ward. Bacillus cereus was isolated from the dust, and from cleaned towels and gowns. PFGE fingerprinting differed among four patients' sample. We considered the present case as an undetected Bacillus cereus pseudo-outbreak that lasted for about one year after the renovation work of the hospital.We also considered that filters of the HVAC-system and towels and gowns were probable sources of the outbreak.

Microbiological assessment of indoor air of a teaching hospital in Nigeria

“…Pseudomonas aeruginosa has been particularly incriminated in nosocomial infection because of its intrinsic resistance to most antibiotics and its ability to survive and multiply at low temperatures and in disinfectant solutions [11] . Regular microbiological surveillance of the different hospital units, patients' surveillance by the hospital's Infection Control Unit, formulation of antibiotic policy and recommendation to hospital management for implementation of findings will go a long way to reduce nosocomial infections.…”

Molecular Epidemiology ofBacillus cereusin a Pediatric Cancer Center

“…Another Bacillus outbreak after renovation work was reported by Ohsaki et al 21) . They considered the case as an undetected Bacillus pseudo-outbreak after the hospital renovation work.…”

“…On the contrary, pseudo-outbreaks are also possible in a situation where an organism is recovered from culture at a higher rate than usual and that cannot be clinically correlated with the supposed infection 20,21) . This situation may result from systemic extrinsic contamination during specimen collection or processing or intrinsic contamination at the time the culture medium 21,22) .…”

“…This situation may result from systemic extrinsic contamination during specimen collection or processing or intrinsic contamination at the time the culture medium 21,22) .…”

“…They also considered that filters of the heating, ventilation, and air-conditioning systems and towels and gowns were probable sources of the outbreak 21) .…”