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| Features
favoring transmissibility of |
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| Cryptosporidium
parvum |
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| • | Broad host ranges |
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| • | Life cycle in single host /
autoinfective |
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| • | Highly infectious |
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| • | Oocysts fully infective upon excretion |
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| • | Large numbers of oocysts may be shed |
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| • | Ubiquitous distribution in environment |
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| • | Highly resistant to disinfection and |
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| environmental pressures |
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| • | No effective therapy |
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