Question

how do Houseflies carry disease causing microbes

Answer 1

during this process they transferred the pathogens first collected by landing on offal disease caused by houseflies are tuberculosis anthrax

Answer 2

When housefly sits on a dumping ground or garbage, etc. At that time some microbes get sticked on the legs of housefly and they comes on us sits somewhere where they rubs there legs and all microbes falls on our body.

Hope it will helps you:-)