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SURVEY FOR Sarcocystis IN THE BROWN-HEADED COWBIRD (Molothrus ater): A COMPARISON OF MACROSCOPIC, MICROSCOPIC AND DIGESTION TECHNIQUES
1 Department of Microbiology, The University of Texas Medical Branch, Galveston, Texas 77550, USA
Adult cowbirds from the Houston, Texas area were examined for Sarcocystis by three methods. Macroscopically, 53 of 253 (20.9%) birds examined were positive. Microscopic examination of abdominal muscle from 62 of the 200 negative birds showed another 4 (6.4%) to be infected. Pepsin digestion, the most sensitive technique for macroscopically negative birds, showed 7 of the 62 (11.2%) to be infected.
Submitted on May 27, 1977
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