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House Fly (Musca domestica) Common houseflies are ubiquitous insects with a flight range of at least five miles. They are very active indoors, where they can breed the whole year round. In colder conditions breeding generally ceases before winter, the insects overwintering as pupae or adults. Because they cannot take solid food, a drop of liquid is expelled from the proboscis - or elongated mouth and the solid food substance either in solution or in the form of minute suspended particles is re-imbibed with it. Hence the flies disease carrying and spreading potential, its last meal may have been in manure. Fly spots are regurgitation marks left after a meal and are similarly potentially disease carrying. Fly Facts The life expectancy of a fly is 8 days to 2 months. Flies plague every part of the world except the polar ice caps. One pair of flies can produce more than one million offspring in as little as six to eight weeks. Flies transmit pathogenic protozoa, bacteria, virusses, worms, rickettsia and fugues. They also serve as host for staphylococcus aureaus, salmonella entireties, E. Coli, strep agalaciae and strep agalctiae. As many as 33 million microorganisms may flourish in a single fly's gut, while half a million more swarm over it's body and legs. Flies spread diseases readily because they move quickly from rotting, disease-laden garbage to exposed foods and utensils. If a fly deposits one bacterium on a container of egg custard, at the end of 24 hours, that one bacterium will multiply to 280, 000, 000, 000, 000 bacteria - more than enough to cause food poisoning symptoms. A fly deposits thousands of bacteria each time it lands. For every fly seen, there are an estimated 19 more hidden from view. This mean humans don't even see 95 percent of flies present at an infestation. When flies eat they regurgitate an enzyme called volidrop, along with a portion of their stomache contents, which softens their food, making it easier to digest. Discouraging Fly Activity
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