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Giardiasis in Colorado: an epidemiologic study

R A Wright, H C Spencer, R E Brodsky

American Journal of Epidemiology

|April 1, 1977

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Giardia lamblia is common in Colorado, especially among adults aged 16-45. Drinking untreated mountain water is a significant risk factor for this parasitic infection.

Area of Science:

Infectious Diseases
Environmental Health
Parasitology

Background:

Giardia lamblia is a significant cause of waterborne illness.
Colorado's unique environment may influence Giardia lamblia prevalence.

Purpose of the Study:

To determine the prevalence of Giardia lamblia in Colorado.
To identify risk factors associated with Giardia lamblia infection in Colorado residents.

Main Methods:

Retrospective laboratory survey of stool examinations.
Statewide telephone survey of cases and matched controls.

Main Results:

3% of 22,743 stool exams were positive for Giardia lamblia.
Infection common in ages 16-45; risk factors include visiting mountains, camping, and drinking untreated water.

Related Experiment Videos

Seasonal case distribution correlated with stream contamination.

Conclusions:

Giardia lamblia is endemic in Colorado.
Drinking untreated mountain water is a primary cause of endemic Giardia lamblia infections.