Is It A Pest
for House Fly
Yes. Wherever it reaches food or food-contact surfaces, the house fly is both a nuisance and a public-health concern, given its documented role in moving disease organisms from filth onto what we eat. A lone fly that slipped indoors is a swat-and-forget event; steady numbers signal a breeding site nearby. Source: https://extension.psu.edu/house-flies Source: https://wwwnc.cdc.gov/eid/article/11/3/04-0460_article