Giardiasis (pronounced "jee-ar-DYE-uh-sus"), or giardia, is an infection of the intestines caused by the parasite Giardia lamblia. You may become infected with giardia if you eat food or drink water that is tainted with human or animal waste. You can also get giardia by coming into close contact with an infected person. The illness is most often a problem in developing countries where tap water is not safe; but you can get giardiasis in developed countries, too. In the U.S. and Canada, you can get giardia by drinking untreated water from wells, streams, rivers, and lakes. This is true even in mountain lakes and streams, where the water may seem pure. Follow the links below to find WebMD's comprehensive coverage about how giardiasis is contracted, what it looks like, how to treat it, and much more.
Giardiasis: What You Need to Know About Giardia
Giardiasis is one of the most common intestinal parasites. If it’s in the water you drink or a diaper you change, you’re more likely to have tummy trouble.
Probiotics for Diarrhea
Probiotics may help prevent travelers' diarrhea, diarrhea from antibiotics, and more. A guide to the best sources and kinds of probiotics.
Understanding Diarrhea Treatment
How do you know you have diarrhea? How do you treat it? Find out more.
Baby Diarrhea: Causes, Treatment, and More
Diarrhea in babies, when and how to treat it, and when to call the doctor.
Diarrhea: Triggers and Treatments
What is starting your chronic diarrhea? How can you treat it? We’ve got the answers you’re looking for.
Preventing Dehydration When You Have Diarrhea or Vomiting
A prolonged bout of diarrhea or vomiting can cause the body to lose more fluid than it can take in, resulting in dangerous dehydration.
What Causes Diarrhea?
The average adult has diarrhea four times a year, often caused by food, medication, stress, or, sometimes, an underlying medical problem.
Travelers' Diarrhea: What You Need to Know
WebMD asks CDC expert Phyllis Kozarsky about travelers’ diarrhea and its causes, symptoms, prevention and treatment.