Can Drain Flies Cause Illness?
WouterDrain flies, also known as moth flies or sewer flies, are small, wingless insects that can infest a household. They lay their eggs in wet organic matter, including compost piles and septic tanks. The adults feed on decomposing organic matter, and the larvae feed on bacteria and sewage. While adults do not carry diseases, the larvae can transmit parasites and can cause myiasis, a life-threatening parasitic disease.
Although drain flies do not bite humans, they can become a nuisance in large numbers and require diligent effort to eliminate. They breed in drains and other areas, including sinks, bathtubs, floors, and wash basins. Infestations of drain flies are difficult to remove and require professional assistance.
Adult drain flies live approximately 20 days. They breed once during their life span. Once they emerge from pupal casings, female drain flies lay 30 to 100 eggs. The eggs hatch after 48 hours. During this time, drain flies reproduce rapidly. An infestation can result in as many as 100 identical drain flies in the same house.
The most effective way to eradicate drain flies is to remove their breeding site. Drain flies are attracted to organic matter collected in drains. By cleaning the drain regularly, homeowners can deter flies from nesting in their homes. Alternatively, they can use aerosol insect sprays to get rid of any remaining flies.
