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Physical and biochemical properties of Cryptosporidium parvum oocyst were examined after storage under various conditions. Oocyst-positive-fecal samples recovered from calves were either stored in a 2.0% potassium dichromate solution (Cr) or deionized water (W), or kept as a fecal pellet (P), and stored at 4 or 18°C for a maximum of 100 days. When stored in Cr at 4°C, the morphology of oocysts and...
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