Pathogens are organisms that cause disease.
Viruses, bacteria and protozoa are the three types of organisms
responsible for most waterborne disease. The contamination of water
with fecal matter from humans or other animals is the source of
these diseases. In most cases, the intestinal tract is affected
and symptoms include diarrhea, vomiting, fever, chills and headaches.
Some waterborne diseases can cause death.
Viruses cause a number of waterborne diseases:
- poliomyelitis (polio) – which can cause paralysis
- viral hepatitis (Type A) – affecting the liver
- Norwalk gastroenteritis – most common cause of gastroenteritis
- rotavirus diarrhea – very common in children
Vaccines are available for poliomyelitis, but not for the other
virally-transmitted diseases. Prevention is accomplished by maintaining
good public health practices, including a safe water supply.
the world of polio
and contaminated strawberries