Houseflies are nuisance pests that love sitting on fresh and rotting food, when allowed to do such a thing, houseflies become a source of significant illnesses. Scientists have discovered that just a single leg on a housefly carries around millions of harmful germs that act as the sojourners of significant illnesses more so to humans and put their health at risk. Houseflies are known to transfer a variety of parasitic bacterial and viral diseases.
http://life-span.info/house-fly-life-span/
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