Since houseflies are known to fees on manure, sputum, faeces, garbage and sewage, as well as on man’s food, they easily spread disease germs to man as they carry these germs to contaminate food.
The saliva of houseflies is deposited on food to soften and dissolve it and in so doing, the food is contaminated with germs. Houseflies usually carry germs of typhoid, fever, cholera, dysentery, poliomyelitis, etc…
