the housefly insect resting on the yellow surface

africa animal animals background bacteria bacterium biological black body bug calling carries cause chicken cholera cholerae clean closeup color commonly cow cries day decrease diarrhea dirty disease disturb domestic domestica drink drinking egg environment ethnic eyes fly food green health houseflies housefly human hygiene illness illustration infection insect leaf macro mammals medical microbe microorganisms milk musca nature pathogenic patogene perform poor red same sheep sickness small time unhygienic vibrio village virus water wildlife wing world