Objectives. To describe a malarial outbreak amongst a British military force deployed to Sierra Leone in May 2000.
Methods. A case–control study was conducted that investigated possible risk or protective factors affecting the population.
Results. All bite avoidance measures (use of insecticide-treated bed nets and insecticide-treated clothes and use of thermal fogging/knockdown insecticide sprays) offered some degree of protection, although only use of clothes and nets was significant at the 5% level. Use of 3 or 4 protection measures was significantly protective, as was the cumulative protective effect when using multiple protective measures.
Conclusion. Professionals giving travel advice must continue to advice travellers that they can significantly improve their levels of malarial protection by using multiple protection measures.
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Accepted: April 11, 2003
© 2003 The British Infection Society. Published by Elsevier Inc. All rights reserved.