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Contamination of hospital linen by Bacillus cereus

  • D. Barrie (a1), P. N. Hoffman (a2), J. A. Wilson (a1) (a2) and J. M. Kramer (a3)

Summary

An investigation into two cases of post-operative Bacillus cereus meningitis revealed that hospital linen laundered by a batch continuous washing machine was heavily contaminated by B. cereus spores. The washing machine, detergents, other chemical additives and the water supply were eliminated as the source of contamination.

It was found that the linen introduced into the washing machine had a high B. cereus spore content and that this was still present after the wash process. The spores were not killed by either the heat disinfection stage of the wash or the addition of chemical disinfectants and were not removed by the dilution in the process.

The multiplication of B. cereus was thought to have occurred on used, damp linen stored in plastic bags, particularly when ambient temperatures were high. An increase in the water flow through the washing machine was the only measure associated with a decrease in B. cereus on laundered linen.

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Copyright

References

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1.Barrie, D, Wilson, JA, Hoffman, PN, Kramer, JMBacillus cereus meningitis in two neurosurgical patients; an investigation into the source of the organism. J Infect 1992; 25: 291–7.
2.Department of Health 1987. Hospital laundry arrangements for used and infected linen. HC(87)30. London: HMSO.
3.Niskanen, A, Pohja, MSComparative studies on the sampling and investigation of microbial contamination of surfaces by the contact plate and swab methods. J Appl Bact 1977; 42: 5363.
4.Whyte, W, Hodgson, R, Tinckler, JThe importance of airborne bacterial contamination of wounds. J Hosp Infect 1982; 3: 123–35.
5.Kramer, JM, Gilbert, RJBacillus cereus and other Bacillus species. In: Doyle, MP, ed. Foodborne bacterial pathogens. New York: Marcel Dekker, 1989.
6.Benedict, RC, Partridge, T, Wells, D, Buchanan, RLBacillus cereus: Aerobic growth kinetics. J Food Protect 1993: 56: 211–14.
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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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