CDC Travelers' Health Information on Leptospirosis  
   Includes risk for travelers, cause, prevention, and treatment.
   http://www.cdc.gov/travel/diseases/lepto.htm

CDC - Leptospirosis  
   Factsheet with cause, symptoms, treatment, and prevention.
   http://www.cdc.gov/ncidod/dbmd/diseaseinfo/leptospirosis_g.htm

eMedicine - Leptospirosis  
   Article by Patrick W Hickey, MD.
   http://www.emedicine.com/ped/topic1298.htm

Health Protection Agency: Leptospirosis  
   Includes cause, symptoms, diagnosis, and prevention.
   http://www.hpa.org.uk/infections/topics_az/zoonoses/leptospirosis/gen_info.htm

Leptospirosis Facts  
   Features cause, symtptoms, treatment, and prevention.
   http://www.astdhpphe.org/infect/Lepto.html

Leptospirosis in Humans  
   Includes cause, people at risk, symptoms, and complications.
   http://www.vetmed.wisc.edu/pbs/zoonoses/Leptospira/leptohuman.html

MedlinePlus Medical Encyclopedia: Leptospirosis  
   Features cause, symptoms, treatment, diagnosis, prevention, risk factors, and complications.
   http://www.nlm.nih.gov/medlineplus/ency/article/001376.htm

The Merck Manual: Leptospirosis  
   Short factsheet on the disease.
   http://www.merck.com/mrkshared/mmanual_home2/sec17/ch190/ch190j.jsp

WHO: Water-related Diseases - Leptospirosis  
   Factsheet with cause, distribution, scope of the problem, and prevention efforts.
   http://www.who.int/water_sanitation_health/diseases/leptospirosis/en/

Medmicro: Leptospira  
   Scientific and medical information about the spirochete and the diseases it causes.
   http://gsbs.utmb.edu/microbook/ch035.htm

Barbados Leptospira Laboratory  
   Described the research activities of the laboratory, established in 1979. Includes a page of advice to help you avoid getting leptospirosis.
   http://users.sunbeach.net/users/levett/lepto.htm

The Weil's Disease Information Center  
   Advice for the caving and medical community on leptospira including symptoms and treatment.
   http://www.leptospirosis.org/