Salmonella spp . The usual means of human exposure would be from direct handling of infected livestock, drinking nonpasteurized milk, or eating foods that had been contaminated and not properly handled or cooked. The organism can survive in the soil under fecal pats or in slurry for 9-12 months. However, it is highly susceptible to sunlight, drying, and most disinfectants and dies quickly when exposed to these. Managing manure properly is the best way to control flies on dairy farms, solving at least 75 percent of the fly control problem.
Manure is a favorite place for flies to lay their eggs.
With most dairy farms using free stall housing and avoiding bedded manure packs, less manure remains in the animal housing for infestation by flies. The visits involve inspection of the maintenance and cleanliness of the milking structure and milking equipment, use of proper milking procedures, handling and cooling of milk, and pest control. Control of rodents around the milk house and livestock structures is best accomplished by minimizing their access to a food supply. Dairy farmers control rodents by proper storage of feed, proper disposal of spoiled feed, and limiting areas attractive as living quarters for rodents. Dairy farmers must control rodents to minimize costs caused by feed loss, damage to livestock and feed structures, and to minimize spread of disease carried by rodents.