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Grand Teton National Park Report

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The objectives of this research are: 1. To document the occurrence of Giardia and other protozoan parasites in Microtus and other sympatric small mammals of Grand Teton National Park; 2. To compare parasite loads for these animals during wet and dry seasons; 3. To determine the occurrence of intestinal parasites in Microtus during a growth cycle that ranges from years of lowest to years of highest population densities of the hosts; and 4. To investigate the relationship of infection to reproductive success in Microtus.