Protistology • 14 (4), 204–218 (2020) |
Life cycle, ultrastructure and host-parasite relationships of Angomonas deanei (Kinetoplastea: Trypanosomatidae) in the blowfly Lucilia sericata (Diptera: Calliphoridae) |
Anna Ganyukova, Marina Malysheva and Alexander Frolov Zoological Institute RAS, 199034 St. Petersburg, Russia | Submitted August 14, 2020 | Accepted September 4, 2020 | Summary The results of experimental oral infection with monoxenous symbiont-containing trypanosomatid Angomonas deanei (MN isolate) of larvae and imagoes of the fly Lucilia sericata are described. It was discovered that larvae infected by this parasite does not develop a persistent infection. The imago's rectum was found to be the preferential site of colonization by flagellates where they form massive clusters until the death of an adult insect. Laboratory experiments on A. deanei transmission have demonstrated that the parasite may be transmitted horizontally (via contaminated substrate and/or coprofhagy) between adult flies. In the host’ rectum, parasites are detected on the cuticular lining, mainly at places near rectal glands and directly on the surface of the rectal glands. The attachment of the parasite is carried out through the apical or lateral surface of the flagellum with the formation of hemidesmosome-like junctions. Ultrastructural features of the parasite consistent with previous descriptions. However, the presence of a cytostome located in the distal part of the flagellate pocket was noted for the first time. The cytostome has the shape of a fossa, which is associated with cytoplasmic vesicles.
Key words: Trypanosomatidae, symbiont-harbouring trypanosomatids, Angomonas deanei, parasite of Diptera,
Lucilia sericata, life cycle, host-parasite relationships, experimental infection, ultrastructure
Address for correspondence: Anna Ganyukova. Zoological Institute RAS, Universitetskaya nab. 1, 199034 St. Petersburg, Russia; e-mail: anna.ganyukova@gmail.com |
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