detection and molecular identification of sarcocystis rileyi (apicomplexa: sarcocystidae) from a northern shoveler (anas clypeata) in mexico.we detected macroscopic sarcocystis cysts in a northern shoveler ( anas clypeata ) in the lerma marshes, state of mexico, mexico in february 2014. the 5.0×2.0-mm macrocysts in the breast muscle of the duck were ovoid and yellow. using an optical microscope, we saw parasitic forms of a sarcocystis sp. among muscular fibers; the cysts measured 3.5×1.1 mm. the external wall had a smooth surface and the internal wall had a spongy texture. we identified the macrocysts as sarcocystis rileyi according ...201627537932
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