Salmonella is a bacterium that can cause disease in humans, dogs, cats, and other animals.  It can cause a variety of symptoms, most commonly severe vomiting and/ or diarrhea. In severe infections it can lead to a blood infection or septicemia.  It can also cause abscesses, meningitis, bone infections, and abortion. Salmonella is found worldwide.  In the U.S., it is commonly associated with contaminated food, uncooked or undercooked meats, reptiles, and birds.  Epidemics of salmonellosis in migrating songbirds in the spring can create disease in bird-hunting cats.  Most, if not all, reptiles carry Salmonella in their intestines, and occasionally shed it in their feces.  The bacteria usually do not cause disease in reptiles, but a growing number of Salmonella infections each year in people can be traced to pet reptiles.  It is virtually impossible to eliminate Salmonella from pet reptiles.

Rarely, contamination of commercial dog food or treats with Salmonella has occurred.  More commonly, however, the popular fad of feeding raw food diets to dogs and cats has caused illness in the pets and the people in the household.  A study showed that families that fed raw food to their pets had a much higher incidence of salmonellosis in the humans in the family.

Contaminated human food can also be a source of Salmonella, especially raw eggs, chicken, and undercooked meat.  Even lettuce, fruits and vegetables have been incriminated.  Food can become contaminated if someone infected with Salmonella handles it without washing his or her hands. Treatment of salmonellosis in the milder cases may just involve oral antibiotics.  More severe cases will need hospitalization with intravenous fluids and antibiotics.