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- W1972600527 abstract "Cryptosporidium parvum is an intracellular protozoan parasite causing intestinal malabsorption and diarrhea in humans. The infection is usually self-limiting, although persistent cryptosporidosis is observed in immunocompromised and malnourished individuals. As with other Apicomplexa, the life cycle of Cryptosporidium is thought to comprise a sexual phase, during which a motile microgamont fuses with a sessile macrogamont. The four sporozoites found within each oocyst (the infectious form excreted in the feces) are thought to be the product of a meiotic division taking place immediately following fertilization, but the existence of a meiotic cycle in this genus has not been tested experimentally. To substantiate the occurrence of meiotic recombination in this species, we performed a genetic cross between two distinct isolates of C. parvum co-infected in INF-gamma knockout mice. We found that mixed infections produced recombinant progeny characterized by multilocus genotypes comprising alleles inherited from each parental line. This observation represents the first demonstration of sexual recombination in this pathogen. Together with the occurrence of genetically heterogeneous infections, this finding suggests that outcrossing between genotypes may occur in nature. Experimental crosses among Cryptosporidium populations will facilitate mapping of clinically relevant genes, the delineation of Cryptosporidium species, and defining the taxonomical status of C. parvum subtypes and host-specific genotypes." @default.
- W1972600527 created "2016-06-24" @default.
- W1972600527 creator A5010846884 @default.
- W1972600527 creator A5039421474 @default.
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- W1972600527 date "2002-01-01" @default.
- W1972600527 modified "2023-10-15" @default.
- W1972600527 title "Experimental evidence for genetic recombination in the opportunistic pathogen Cryptosporidium parvum" @default.
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- W1972600527 doi "https://doi.org/10.1016/s0166-6851(01)00393-0" @default.
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