New findings on the developmental process of Ascogregarina taiwanensis and Ascogregarina culicis in Aedes albopictus and Aedes aegypti

Journal of the American Mosquito Control Association
Sudipta Roychoudhury, Mutsuo Kobayashi

Abstract

Infection in different stages of larvae of Aedes aegypti and Ae. albopictus with Ascogregarina taiwanensis and A. culicis, respectively, revealed that the oocysts of Ascogregarina spp. are able to infect any instar and can complete their life cycle within 9.5 +/- 1 days. When early instars ingested oocysts, parasite development was synchronized to larval-pupal ecdysis and oocyst dissemination occurred at the time of adult emergence, oviposition, or both. The parasites also developed normally when infecting 2nd, 3rd, and early 4th instars and oocysts were released only during oviposition. The parasitic development stopped at the gamont stage when oocysts were ingested by late 4th instars (6 days old). The release of sporozoites in the midgut of any larval stage started within 45 min of oocyst ingestion. About 98% of oocysts of both A. taiwanensis and A. culicis were emptied within 2-3 h of their ingestion in their respective hosts. The oocysts of both species remained viable on desiccated filter paper stored at 27 degrees C and 65 +/- 5% relative humidity, indicating that the oocysts were resistant to dryness. The oocysts of A. culicis could survive up to 6 months, whereas those of A. taiwanensis survived up to 4 months. These b...Continue Reading

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Citations

May 20, 2009·Journal of Invertebrate Pathology·Andrea Paola Albicócco, Darío Vezzani
Feb 13, 2009·Journal of Evolutionary Biology·S Fellous, J C Koella
May 7, 2014·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Lucie Lantova, Petr Volf
Aug 3, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Christopher C M BakerNaomi E Pierce
Jan 10, 2018·Parasites & Vectors·Pui-Jen TsaiHsi-Chyi Yeh
Apr 27, 2019·Frontiers in Microbiology·Valter Vinícius Silva MonteiroMarta Chagas Monteiro
Feb 12, 2021·Journal of Medical Entomology·John Soghigian, Todd Livdahl

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