Giardiasis or Giardia is an intestinal infection caused by a parasitic single-celled organism called Giardia intestinalis. These protozoans are found in the intestines of many animals, including dogs and humans. The microscopic parasite clings to the surface of the intestine, or floats free in the mucus lining of the intestine. Once a person or animal has been infected with Giardia, the parasite lives in the intestine and is passed in feces. Because the parasite is protected by an outer shell, it can survive outside the body and in the environment for long periods of time (i.e., months).

Giardia can cause weight loss, loss of appetite, fatigue, and diarrhea with or without mucus; sometimes small amounts of blood may be seen in the stool. Giardia is harder to diagnose than other intestinal parasites, and several stool samples may have to be tested before it is found. If necessary, your veterinarian will recommend treatment with medications to eliminate the infection. Because it is highly contagious among animals, good hygiene and sanitation are important when there are multiple pets in the household.

Lakeside Veterinary clinic assumes no liability for injury to you or your pet incurred by following these descriptions or procedures.