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Botflies, also known as warble flies, heel flies, and gadflies, are flies of the family Oestridae. Their larvae are internal parasites of mammals, some species growing in the host's flesh and others within the gut. Dermatobia hominis is the only species of botfly known to parasitize humans routinely, though other species of flies cause myiasis ...
Either the eggs hatch while the mosquito is feeding and the larvae use the mosquito bite area as the entry point, or the eggs simply drop off the muscoid fly when it lands on the skin. The larvae develop inside the subcutaneous layers, and after about eight weeks, they drop out to pupate for at least a week, typically in the soil.
The female fly cements individual eggs onto hairs of the forelimbs and shoulders of horses, mules and donkeys. [7] [5] Each female lays up to 1000 eggs. [7] In order to hatch, the eggs must be licked by the host animal. [5] If taken into the host's mouth during grooming, the egg will hatch in the mouth. [5]
Like other botflies, the adult lays eggs on the host animal, in this case, near the horn of the rhinoceros or elsewhere on the head.The eggs are oblong and white. The eggs hatch after about six days, and the larvae, about 2.5 mm long, burrow inside, and attach themselves to the stomach wall by spines and mouth-hooks.
The most efficient way known to avoid the infection of Gasterophilus is by deparasitizing the animals with products like trichlorphon and dichlorvos, by using hot water to scrub the areas where the eggs are laid to kill the larvae, and by cleaning the areas where the feces of the infected animal had been in order to avoid the adult formation. [6]
To prevent myiasis in humans, there is a need for general improvement of sanitation, personal hygiene, and extermination of the flies by insecticides. Clothes should be washed thoroughly, preferably in hot water, dried away from flies, and ironed thoroughly. The heat of the iron kills the eggs of myiasis-causing flies. [23]
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The fly would have produced an audible sonic boom; The supersonic fly would have been invisible to the naked eye; and; The impact trauma of such a fly colliding with a human body would resemble that of a gunshot wound. Using the original report as a basis, Langmuir estimated the deer botfly's true speed at a more plausible 25 mph (40 km/h).