A. found in the intestinal tracts of poultry and other animals; outbreaks have been linked to raw eggs, unpasteurized milk and raw or undercooked meat, poultry or shellfish; avoiding cross contamination can help prevent this microorganism from causing illness. B. most often affects fetuses; outbreaks have been traced to unpasteurized milk, lunch meats and hot dogs. C. found in infected cuts and in the nose and throat; outbreaks have been associated with mayonnaise based salads (macaroni, chicken, egg) and cream filled baked goods; can be prevented by proper cooling and refrigeration of foods. D. found in the intestinal tracts or animals and humans; common cause of waterborne disease in humans in the United States. E. found in the human intestinal tract; outbreak have been associated with salads and contaminated water; using sanitary practices can prevent illness from this microorganism.