Houseflies pass through four distinct stages: egg, larva, pupa and adult. The life expectancy of a housefly is generally 15 to 30 days and depends upon temperature and living conditions. Flies dwelling in warm homes and laboratories develop faster and live longer than their counterparts in the wild. The housefly's brief life cycle allows them to multiply quickly if left uncontrolled. Houseflies are known to carry over 100 diseases, including tuberculosis and cholera. They transmit diseases both by feeding and by carrying pathogens on their feet and mouths. Contact your local pest control expert to discuss pest control solutions specifically tailored for your home.