Salmonella is found in a wide range of foods and environments, from raw poultry and eggs to fresh produce, spices, pet food, and even the surfaces of reptile tanks. The CDC estimates Salmonella causes 1.35 million infections, 26,500 hospitalizations, and 420 deaths in the United States every year, and those numbers haven’t improved in two decades.
Poultry, Eggs, and Meat
Raw and undercooked chicken is the source most people associate with Salmonella, and for good reason. The bacteria live naturally in the intestinal tracts of poultry and can contaminate meat during processing. Eggs are another major vehicle. Studies of commercial eggs have found Salmonella on about 10.7% of eggshells, with 3.6% of the interior egg contents also testing positive. That’s why cracking eggs on a cutting board and then using that board for other food is a real contamination risk, not just a theoretical one.
Raw or undercooked beef, pork, veal, and lamb can also carry Salmonella, though at lower rates than poultry. Ground meats pose a higher risk than whole cuts because the grinding process distributes bacteria from the surface throughout the meat.
Fresh Fruits and Vegetables
Produce is a less obvious but significant source. Salmonella reaches fruits and vegetables primarily through contaminated irrigation water. The bacteria enter surface waterways through animal feces and rainfall runoff, then get sprayed or dripped onto crops in the field. Once on a plant, Salmonella doesn’t just sit on the surface. On tomatoes, it can multiply in warm, humid conditions. On lettuce, it enters the leaf tissue through tiny pores called stomata, which means washing alone may not eliminate it.
Outbreak-linked produce includes tomatoes, cucumbers, cantaloupes, watermelons, lettuce, hot peppers, papayas, mangoes, beans, and alfalfa sprouts. Sprouts are particularly risky because the warm, moist conditions needed to grow them are also ideal for bacterial growth. A 2015-2016 outbreak tied to imported cucumbers from Mexico sickened at least 907 people across 40 states and killed six.
Spices, Flour, and Nuts
One of the more surprising places Salmonella survives is in dry, shelf-stable foods like spices, flour, and nut products. These foods have extremely low moisture, which prevents bacterial growth, but Salmonella doesn’t need to grow to remain dangerous. It simply goes dormant and waits. In black pepper powder, Salmonella survived for over a year at room temperature with only modest die-off. In chili powder, it took four months for levels to drop significantly, and in cinnamon, eight months.
This persistence explains why recalls for Salmonella-contaminated spices, raw flour, peanut butter, and almond products happen regularly. Cooking or baking these products kills the bacteria, but eating raw cookie dough, sprinkling uncooked spices on ready-to-eat foods, or snacking on raw nuts carries real risk.
Raw Milk and Unpasteurized Juice
Raw (unpasteurized) milk can contain Salmonella along with several other harmful bacteria. Pasteurization, the brief heating process used in commercial dairy production, kills these pathogens reliably. Products made from raw milk, including certain soft cheeses and yogurts, carry the same risk. Unpasteurized fruit juices, particularly fresh-pressed apple cider and orange juice sold at farm stands, have also been linked to Salmonella outbreaks.
Seafood
Imported seafood is a bigger Salmonella risk than most people realize. A nine-year FDA survey of over 12,000 seafood samples found Salmonella in 10% of imported raw seafood, compared to 2.8% of domestic raw seafood. Even ready-to-eat imported products like cooked shrimp, fish paste, smoked fish, and caviar tested positive at a rate of 2.6%. Domestic seafood is safer, but raw preparations like sushi or ceviche still carry some risk.
Reptiles, Amphibians, and Other Pets
Salmonella isn’t just a food issue. Reptiles and amphibians are the most common animal carriers, and even healthy ones harbor the bacteria in their digestive tracts. Turtles, lizards, snakes, frogs, and salamanders all shed Salmonella in their droppings, which contaminates their skin, tank water, and anything in their habitat. You don’t have to touch the animal directly. Handling tank decorations, cleaning supplies, or surfaces near the enclosure is enough.
The risk to children is so well established that the U.S. has banned the sale of turtles smaller than four inches since 1975. That single rule prevents an estimated 100,000 childhood Salmonella infections every year. Feeder rodents sold for pet snakes, whether frozen or live, also carry the bacteria. Freezing does not kill Salmonella.
Pet Food and Treats
Raw pet food diets are a growing source of household Salmonella exposure. Studies have found Salmonella in 7% to 44% of commercial raw pet foods, and homemade raw diets test positive at even higher rates. Neither the FDA nor the CDC recommends feeding raw diets to pets. But it’s not only raw food: pig ear treats tested positive for Salmonella 51% of the time in one study, and other pet treats made from lamb, turkey, or beef showed contamination rates around 38%. Even dry kibble isn’t always clean, with some surveys finding prevalence as high as 26%.
The risk here is primarily to the humans handling the food, not just the pets eating it. Touching contaminated pet food or treats and then touching your face, kitchen surfaces, or other food is a common route of transmission.
Kitchen Surfaces and Cross-Contamination
Salmonella can survive on dry kitchen surfaces for surprisingly long periods. On stainless steel and plastic, certain strains persist for 10 days to several weeks. Under favorable conditions, one common strain has survived on stainless steel for over four years in laboratory settings. Cutting boards, countertops, sink handles, and dish cloths that contact raw meat or eggs become contamination bridges to other foods.
The practical takeaway: wash cutting boards and counters with hot soapy water immediately after contact with raw meat, poultry, or eggs. Use separate boards for raw protein and produce when possible.
Safe Cooking Temperatures
Heat is the most reliable way to kill Salmonella in food. The USDA’s minimum internal temperatures, measured with a food thermometer, are:
- All poultry (whole birds, breasts, thighs, wings, ground): 165°F (73.9°C)
- Ground beef, pork, veal, and lamb: 160°F (71.1°C)
- Beef, pork, veal, and lamb steaks, chops, and roasts: 145°F (62.8°C), with a 3-minute rest
For foods that aren’t cooked, like salads or raw sprouts, thorough washing reduces but does not eliminate risk. Refrigeration slows Salmonella growth but doesn’t kill it. Only sustained heat at the right temperature does.