Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9486331 | Journal of Invertebrate Pathology | 2005 | 8 Pages |
Abstract
Helicosporidium sp. is a unique, achlorophyllous green alga that has been reported to infect various insect orders, including Lepidoptera, Diptera, and Coleoptera. The infectious cyst stage is ingested by the host, ruptures in the midgut lumen, and releases a filamentous cell. Histopathological examinations using larvae of a susceptible noctuid host, Spodoptera exigua, showed both cysts and filamentous cells affiliated with the microvillar lining of the midgut epithelium. A considerable proportion of the ingested cysts (22-39%) were recovered in feces collected 24Â h after ingestion. A small number of filamentous cells passed the midgut epithelium and entered the hemocoel within 4-24Â h after cyst ingestion. After 48Â h, vegetative cell stages were detected in the hemolymph, followed by a 4- to 5-day period of increasing multiplication. Cyst differentiation in the colonized hemolymph began 6-7Â days after the treatment.
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Authors
Verena-Ulrike Bläske-Lietze, Drion G. Boucias,