Gram-Negative Bacteremia in Open-Heart-Surgery Patients Traced to Probable Tap-Water Contamination of Pressure-Monitoring Equipment
| Autor: | Judith R. Rudnick, Consuelo M. Beck-Sague, Roger L. Anderson, William R. Jarvis, Barbara Schable, J. Michael Miller |
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| Rok vydání: | 1996 |
| Předmět: |
Microbiology (medical)
medicine.medical_specialty biology business.industry Epidemiology Outbreak Klebsiella oxytoca Contamination biology.organism_classification medicine.disease law.invention Surgery Infectious Diseases law Bacteremia Equipment Contamination Cardiopulmonary bypass medicine business Enterobacter cloacae Cohort study |
| Zdroj: | Infection Control and Hospital Epidemiology. 17:281-285 |
| ISSN: | 1559-6834 0899-823X |
| DOI: | 10.2307/30141927 |
| Popis: | Objective: To determine the cause(s) of an outbreak of gram-negative bacteremia (GNB) in open-heart–surgery (OHS) patients at hospital A.Design: Case-control and cohort studies and an environmental survey.Results: Nine patients developed GNB with Enterobacter cloacae (6), Pseudomonas aeruginosa (5), Klebsiella pneumoniae (3), Serratia marcescens (2), or Klebsiella oxytoca (1) following OHS; five of nine patients had polymicrobial bacteremia. When the GNB patients were compared with randomly selected OHS patients, having had the first procedure of the day (8 of 9 versus 12 of 27, P=.02), longer cardiopulmonary bypass (median, 122 versus 83 minutes, P=.01) or cross-clamp times (median, 75 versus 42 minutes, P=.008), intraoperative dopamine infusion (9 of 9 versus 15 of 27, P=.01), or exposure to scrub nurse 6 (6 of 9 versus 4 of 27, P=.001) were identified as risk factors. When stratified by length of the procedure, only being the first procedure of the day and exposure to scrub nurse 6 remained significant. First procedures used pressure-monitoring equipment that was assembled before surgery and left open and uncovered overnight in the operating room, whereas other procedures used pressure-monitoring equipment assembled immediately before the procedure. At night, operating rooms were cleaned by maintenance personnel who used a disinfectant-water solution sprayed through a hose connected to an automatic diluting system. Observation of the use of this hose documented that this solution could have contacted and entered uncovered pressure-monitoring equipment left in the operating room. Water samples from the hose revealed no disinfectant, but grew P aeruginosa. The outbreak was terminated by setting up pressure-monitoring equipment immediately before the procedure and discontinuing use of the hose-disinfectant system.Conclusions: This outbreak most likely resulted from contamination of uncovered preassembled pressure-monitoring equipment by water from a malfunctioning spray disinfectant device. Pressure-monitoring equipment should be assembled immediately before use and protected from possible environmental contamination. |
| Databáze: | OpenAIRE |
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