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- W2007688384 abstract "Pupal stages of Leptothorax ants collected near West Yellowstone, MT, USA, displayed striking signs and symptoms of disease, i.e., grey to black coloration, irregular pigmentation of compound eyes and toothless mandibles. Light microscope studies revealed heavy infections by a neogregarine, the life history of which is described. The life cycle of the pathogen includes micronuclear and macronuclear schizogonies, gametogony and sporogony. Schizonts of both types vary in size depending on the number of nuclei which is usually defined by doubling, thus giving rise to 8, 16, 32, 64 or even 128 uninucleate merozoites. In smears and sections, micronuclear merozoites are typically arranged in rosettes. In the early transformation of zygotes, sickle-shaped developmental stages have been encountered, so far undescribed from neogregarines. Two spores (oocysts), each developing eight sporozoites, evolve from each gametocyst, as is typical of the genus Mattesia. Mature lemon-shaped spores measure 13.8 9.3 μm in fresh preparations. Infections can be readily transmitted to healthy colonies and to other Leptothorax species by feeding crushed infected pupae. Vegetative life cycle stages grow and multiply in the haemocoel, only to some extent they infect fat body cells. Macronuclear merozoites invade the hypodermis and the fat body but also settle extracellularly in the haemocoel. The disease process terminates with the death of the pupae that harbour abundant spores. Infections of adults have not been observed. Despite some minor differences that may result from development of the pathogen in this host, from the type, sequence and morphology of life cycle stages and from the signs and symptoms of disease, this Mattesia species is identified with M. geminata, first discovered in the tropical fire ant, Solenopsis geminata (Fabricius)." @default.
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- W2007688384 date "1997-03-01" @default.
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- W2007688384 title "Studies on the Life History of a Neogregarine Parasite Found in <i>Leptothorax</i> Ants from North America" @default.
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- W2007688384 doi "https://doi.org/10.1080/09583159731108" @default.
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