Parasites
Centers for Disease Control and Prevention: Division of Parasitic Disease: The Division of Parasitic Diseases' (DPD) mission is to prevent and control parasitic diseases in the United States and throughout the world. An amazing amount of information on this site. Check our the A-Z index of diseases.
Parasitic Diseases: Medline Plus
Directory of factsheets, press releases and articles from the National Institute of Health.
www.nlm.nih.gov/medlineplus/parasiticdiseases.html
World Health Organization: Infectious Diseases
Improving global access to infectious disease information
http://www.who.int/topics/infectious_diseases/en/
MeSH (US National Library of Medicine's Medical Subject Headings)
Directory of disease and disorder related information available on the Internet, arranged by disease type.
http://www.mic.stacken.kth.se/Diseases/C03.html
USDA: Parasites and Foodborne Illness
Parasites are more and more frequently being identified as causes of foodborne illness in the United States.
http://www.fsis.usda.gov/factsheets/parasites_and_foodborne_illness/index.asp