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Myiasis
Infestation of the organs and tissues of humans or animals by fly larvae that for some period of time,
feed upon the living or dead tissues or the ingested food of the host
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1. Facultative Myiasis
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Larvae normally found in meat or carrion (dead and decaying flesh of an animal) occasionally adapt to a parasitic existence
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Typically blow flies: species of Calliphora (bluebottles), Lucilia (greenbottles), Phormia, Sarcophaga and
Wohlfahrtia (flesh flies), Cochliomyia macellaria (secondary screw-worm), and others
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Severity depends on fly species, number, location
Genera commonly involved: Musca, Fannia, Muscina
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Primary genera - Fannia, Musca, Sarcophaga
2. Obligatory Myiasis
Calliphorids (metallic):
Cochliomyia hominivorax - New World screw-worm; eradicated from US and Mexico, but outbreaks possible
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Oestrids (bot flies):
Gasterophilus, Hypoderma, Oestrus, Cuterebra sp., and Dermatobia hominis (human bot fly)
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