Field hygiene and sanitation are two facets of military medicine that seek to ensure reduction of casualties through avoidance of non-combat related health issues among military personnel, particularly in the prevention of disease. As such, it encompasses prevention of communicable diseases; promotes personal hygiene; ensures adequate field water supply; supervises food sanitation; administers waste disposal; and controls, prevents, and combats insect-borne diseases transmitted by mosquitoes, louses, flies, fleas, ticks, mites, and other insects. Field hygiene also includes knowledge, avoidance, and control of venomous animals and rodents, as well as mitigation of health problems related to extreme temperature environments.