occurrence of cryptosporidium and giardia in wild ducks along the rio grande river valley in southern new mexico.fecal samples were taken from wild ducks on the lower rio grande river around las cruces, n. mex., from september 2000 to january 2001. giardia cysts and cryptosporidium oocysts were purified from 69 samples by sucrose enrichment followed by cesium chloride (cscl) gradient centrifugation and were viewed via fluorescent-antibody (fa) staining. for some samples, recovered cysts and oocysts were further screened via pcr to determine the presence of giardia lamblia and crytosporidium parvum. the res ...200211772622
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