Naegleria infection

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Risk factors

By Mayo Clinic staff

Naegleria infection is extremely rare. In the United States, millions of people are exposed to the amoeba each year but fewer than 10 people a year get sick from it.

Some factors that might increase your risk of naegleria infection include:

  • Freshwater swimming. Most people who become ill have been swimming in a freshwater lake within the past two weeks.
  • Heat waves. The amoeba thrives in warm or hot water.
  • Age. Children and young adults are the most likely age groups to be affected.
  • Sex. More boys than girls tend to develop naegleria infection.
References
  1. Fact sheet: Naegleria infection. Centers for Disease Control and Prevention. http:www.cdc.gov/ncidod/dpd/parasites/naegleria/factsht_naegleria.htm. Accessed Jan. 7, 2010.
  2. Centers for Disease Control and Prevention and the Council of State and Territorial Epidemiologists Naegleria Workgroup. Primary amebic meningoencephalitis - Arizona, Florida and Texas, 2007. Mortality and Morbidity Weekly Report. 2008:21;573.
  3. Solaymani-Mohammadi S, et al. Naegleria fowleri. In: Long SS, et al. Principles and Practice of Pediatric Infectious Diseases. 3rd ed. Philadelphia, Pa.: Churchill Livingstone Elsevier; 2008. http://www.mdconsult.com/das/book/body/177544974-4/936603208/1679/273.html#4-u1.0-B978-0-443-06687-0..50272-1_4741. Accessed Jan. 7, 2010.
  4. Weisse ME, et al. Primary amebic meningoencephalitis. In: Kliegman RM, et al. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/177544974-4/936603208/1608/712.html#. Accessed Jan. 7, 2010.
  5. Leder K, et al. Free living amebas. http://www.uptodate.com/home/index.html. Accessed Jan. 7, 2010.
  6. Neurological diagnostic tests and procedures. National Institute of Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/misc/diagnostic_tests.htm. Accessed Jan. 8, 2010.
DS01066 March 31, 2010

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