Giardiasis is an infection from a protozoanGiardia lamblia that affects primarily the upper small intestine. It can cause acute, self-limited diarrhea, or chronic diarrhea, abdominal cramps, bloating, malabsorption (of fats and fat-soluble vitamins) and weight loss.
Giardiasis is the most common intestinal parasite infection that is identified in humans in the United States. There is generally a peak in cases during the early summer through early fall.
Arizona 5 year median: 119 cases
Transmission
Typically through contaminated food, water or unwashed hands. Some animals (beavers, other domestic animals) are carriers and improper handling of the feces of these animals can cause illness. Lab Tests & Specimen Info
Test*
|
Specimen
|
Microscopic
examination (Multiple stool specimens may need to be submitted to help with detection) |
Stool
|
Immunoassay
EIA (This test should NOT take the place of the O+P test) |
Stool
|
IgG/IgM
Serology (This test should NOT take the place of the O+P test) |
Serum
|
Standard precautions are recommended in healthcare settings.
Prevention for Patients
- Good hand washing is essential especially before handling food, before eating and after using the toilet. Do not drink unfiltered or untreated water.
Public Health Actions
Public health will conduct an epidemiologic investigation of each reported case to establish possible source of infection.
Public health will conduct an epidemiologic investigation of each reported case to establish possible source of infection.