Journal
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
Volume 83, Issue 6, Pages 1187-1194Publisher
AMER SOC TROP MED & HYGIENE
DOI: 10.4269/ajtmh.2010.10-0433
Keywords
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Funding
- US Public Health Service [T32GM007198, K24AI068903, R01 AI45999, R01CA100768, R01DK017724, R01DK017780]
- [S10RR027933]
- [P30AI036214]
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Plasmodium transmission from the human host to the mosquito depends on the ability of gametocytes to differentiate into ookinetes, the invasive form of the parasite that invades and establishes infection in the mosquito midgut. The biology of P. falciparum ookinetes is poorly understood, because sufficient quantities of this stage of this parasite species have not been obtained for detailed study. This report details methods to optimize production of P falciparum sexual stage parasites, including ookinetes. Flow cytometric sorting was used to separate diploid/tetraploid zygotes and ookinetes from haploid gametetocytes and unfertilized gametes based on DNA content. Consistent production of 10(6)-10(7) P falciparum ookinetes per 10 mL culture was observed, with ookinete transformation present in 10-40% of all parasite forms. Transmission electron micrographs of cultured parasites confirmed ookinete development.
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