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Trends Parasitol. 2006 May;22(5):203-8. Epub 2006 Mar 20.

Giardia and Cryptosporidium join the 'Neglected Diseases Initiative'.

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Coordinator, Parasitic Diseases and Vector Control (PVC), Communicable Diseases Control, Prevention and Eradication (CPE), World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland.


Giardia and Cryptosporidium are ubiquitous enteric protozoan pathogens that infect humans, domestic animals and wildlife worldwide. Both pathogens are significant causes of diarrhea and nutritional disorders in institutional and community settings. They are also significant waterborne pathogens. In developing regions of the world, Giardia and Cryptosporidium constitute part of the complex group of parasitic, bacterial and viral diseases that impair the ability to achieve full potential and impair development and socio-economic improvements. All diseases included in the WHO Neglected Diseases Initiative have a common link with poverty and, as the current view is to take a comprehensive approach to all these diseases, both Giardia and Cryptosporidium were included in 2004. Our current state of knowledge of Giardia and Cryptosporidium is summarized here, and some important questions are raised that need to be addressed if control strategies are to be effective.

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