![]() ![]() 2,5 Dogs and cats with access to the outdoors and animals with weakened immune systems have a greater risk for infestation. Facultative myiasis in soiled or contaminated wounds most often is caused by species of Calliphora (ie, blow flies), Lucilia (ie, green bottle flies, blow flies), Musca (eg, M domestica, the common house fly), Phaenicia (ie, green bottle flies, blow flies), Phormia (ie, black blow flies), and Sarcophaga (ie, flesh flies). Larvae typically feed on dead or decaying host tissue. These flies usually lay eggs in decomposing organic matter (eg, carrion, feces) but may deposit eggs in animals with infected, open wounds, or hair coats soiled with feces, urine, or vomitus. 4įacultative myiasis results when nonparasitic flies opportunistically infest dogs and cats. Yorkshire terriers appear to be at higher risk of Cuterebra spp infestation than other breeds. 3 Flies causing obligatory myiasis may lay eggs in uninfected wounds that may be as small as a tick bite ( C hominivorax) or penetrate through the skin of their hosts to invade healthy tissues ( Cuterebra spp). In cats and dogs, the most commonly encountered bot flies are Cuterebra spp (eg, rodent bot fly, rabbit bot, warble). Cochliomyia hominivorax (ie, primary screwworm) and all bot flies are classic examples of flies that cause obligatory myiasis. Obligatory myiasis is caused by flies whose larvae require a living host for development. Myiasis is characterized as obligatory, facultative, or accidental, based on species‒host dependence 2: Infestation can occur in the eyes, ears, nasal and oral cavities, skin, alimentary tract, urethra, and genitals. The fly larvae feed on the host’s dead or living tissues, body fluids, or ingested food, and lesions with a characteristic putrid odor can occur. ![]() Bot flies can invade skin matted, soiled hair coats or deeper tissues of dogs and cats. The name of the condition derives from ancient Greek μυῖα ( myia), meaning "fly".Myiasis, the infestation of live vertebrate host tissues with dipterous (ie, fly) larvae, 1 is commonly called “maggot” or “bot” infestation and requires prompt veterinary treatment. tenax can cause in humans via water containing the larvae or in contaminated uncooked food. There can also be accidental myiasis that E. Some flies lay eggs in open wounds, other larvae may invade unbroken skin or enter the body through the nose or ears, and still others may be swallowed if the eggs are deposited on the lips or on food. Such variations depend largely on the fly species and where the larvae are located. Myiasis varies widely in the forms it takes and its effects on those affected. Although typically a far greater issue for animals, myiasis is also a relatively frequent disease for humans in rural tropical regions where myiatic flies thrive, and often may require medical attention to surgically remove the parasites. Because some animals (particularly non-native domestic animals) cannot react as effectively as humans to the causes and effects of myiasis, such infestations present a severe and continuing problem for livestock industries worldwide, causing severe economic losses where they are not mitigated by human action. ![]()
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