Giardiasis is an infection of the small intestine caused by the protozoan parasite Giardia lamblia. Giardia is one of the most common causes of waterborne disease in humans in the U.S. and Canada, and is the most frequent cause of non-bacterial diarrhea in North America.
Hepatitis is the name for several different illnesses all caused by an inflammation of the liver. Drinking alcohol and taking drugs can cause hepatitis, but it can also be caused by a viral infection. Hepatitis A is a disease caused by the Hepatitis A Virus (HAV). It is the most common type of hepatitis, with at least 1.4 million reported cases world wide every year.
Escherichia coli, also referred to as E. coli, is a type of fecal coliform bacteria that is found in the intestines of healthy warm-blooded animals and humans. Most E. coli strains are harmless and serve a useful function in the body by stopping the growth of harmful bacteria species and by making necessary vitamins. However, some strains can be opportunistic pathogens, while others can cause gastrointestinal illness in healthy humans when ingested.