Fruit flies (Drosophila melanogaster) can transfer germs from a dirty surface onto a clean one. They may carry bacteria include salmonella, E. coli, and listeria. These three germs each cause food poisoning. Fruit flies often come in through cracks in walls or pre-laid eggs inside of a piece of fruit from the grocery store. Fruit fly eggs are very tiny, and adult fruit flies often lay them inside of fruit or vegetables. Drosophila genome is 60% homologous to that of humans, less redundant and about 75% of the genes responsible for human diseases have homologous in flies.
