Description
Cryptosporidium is taxonomically classified as a Sporozoa, since its oocyst releases four sporozoites (its motile infectious agents) upon excystation. However, it differs from related parasites such as Toxoplasma by its monoxenous life cycle — completing its entire cycle within a single host (Flanigan and Soave, 1993).
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Significance in Biodefense Proteomics
The concern is an attack on water supplies to major cities. The cells in the sporocyst stage are resistant to most chemical disinfectants including chlorine found in both drinking and swimming pool water, but are susceptible to drying and the ultraviolet portion of sunlight. C. parvum has a low ID50 — Less than 10 organisms and, presumably, one organism can initiate an infection. |
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from Public Health Image Library (PHIL)
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