Preventing salmonella comes down to four core habits: cooking food to the right temperature, keeping raw meat away from ready-to-eat foods, refrigerating perishables promptly, and washing your hands after handling anything that could carry the bacteria. Most infections cause diarrhea, fever, cramps, and vomiting that start 6 hours to 6 days after exposure and last 4 to 7 days. The good news is that nearly every case is preventable with basic kitchen and hygiene practices.
Cook to the Right Internal Temperature
Heat is what kills salmonella, and a food thermometer is the only reliable way to confirm you’ve reached a safe temperature. Color and texture are not accurate indicators. The USDA sets these minimums:
- All poultry (chicken, turkey, ground poultry, wings, thighs): 165°F (73.9°C)
- Ground beef, pork, veal, and lamb: 160°F (71.1°C)
- Steaks, chops, and roasts (beef, pork, veal, lamb): 145°F (62.8°C), then let the meat rest for at least 3 minutes before cutting
Insert the thermometer into the thickest part of the meat, away from bone, fat, or gristle. For burgers, check from the side so you’re measuring the center. For whole chickens or turkeys, the innermost part of the thigh is usually the last area to reach temperature.
Stop Cross-Contamination Before It Starts
Raw meat, poultry, and seafood leave invisible traces of bacteria on every surface they touch. The simplest safeguard is to use one cutting board for raw meat and a separate one for produce, bread, and anything that won’t be cooked. That single step prevents bacteria from transferring to foods you eat without further heating.
After each use, wash cutting boards with hot, soapy water, rinse with clean water, and air dry or pat dry with fresh paper towels. The same goes for knives, plates, and countertops that contacted raw meat. Once a board develops deep grooves or excessive wear, replace it. Those grooves trap bacteria that washing can’t fully remove.
Keep raw meat on the lowest shelf of your refrigerator so its juices can’t drip onto other foods. When grocery shopping, bag raw meat separately from produce and ready-to-eat items.
Keep Your Refrigerator at 40°F or Below
Salmonella multiplies rapidly in the “danger zone” between 40°F and 140°F. Your refrigerator should stay at or below 40°F at all times. An inexpensive appliance thermometer placed on an interior shelf can help you verify the temperature, since the built-in dial on many fridges isn’t precise.
Put leftovers in the fridge within two hours of cooking. If the room temperature is above 90°F (like at a summer cookout), that window shrinks to one hour. Use shallow containers so food cools quickly rather than sitting in the danger zone while the center of a deep pot slowly drops in temperature.
Thaw Meat Safely
Never thaw meat on the counter or in hot water. Even if the center of the package is still frozen, the outer layer can reach danger-zone temperatures where bacteria multiply fast. There are three safe methods:
- Refrigerator thawing: The slowest but safest option. Meat stays at a constant 40°F or below the entire time. Plan ahead, since a large roast or whole turkey can take a full day or more.
- Cold water thawing: Submerge the sealed package in cold tap water and change the water every 30 minutes. Cook the food immediately once it’s fully thawed.
- Microwave thawing: Quick, but parts of the food may start cooking during the process. Cook immediately afterward.
If you’re short on time, you can also cook meat straight from frozen. It will take roughly 50% longer than the normal cooking time, but it’s perfectly safe.
Handle Eggs With Care
Fresh eggs can carry salmonella even when the shell looks clean and uncracked. The FDA requires a safe-handling label on all shell eggs that haven’t been pasteurized, and the core advice is straightforward: keep eggs refrigerated, and cook them until both the yolk and white are firm.
For recipes where eggs stay raw or barely cooked (Caesar dressing, homemade mayonnaise, hollandaise, certain ice cream bases), use pasteurized eggs. These have been heat-treated to destroy salmonella and are sold in most grocery stores. The label will say “pasteurized.” They cost a bit more but eliminate the risk entirely for those dishes.
Wash Produce Before You Eat or Peel It
Fruits and vegetables can pick up salmonella from contaminated soil, water, or handling. Rinse all produce under plain running water before eating, cutting, or peeling. This matters even for items you plan to peel, like melons or avocados, because a knife dragged through a contaminated rind pushes bacteria into the flesh.
Gently rub the surface while rinsing. For firm produce like cucumbers and melons, use a clean vegetable brush. For leafy greens like lettuce or cabbage, remove and discard the outermost leaves. After washing, dry produce with a clean cloth or paper towel to further reduce any remaining bacteria. You don’t need soap, vinegar, or commercial produce washes. Plain running water is effective.
Wash Your Hands at Every Transition
Wash your hands with soap and water for 20 seconds before and after preparing food, and especially after touching raw meat, poultry, seafood, eggs, or flour. These are the highest-risk moments for transferring bacteria to your mouth or to other foods. If soap and water aren’t available, hand sanitizer is a reasonable backup, though soap and water is more effective against salmonella.
This also applies outside the kitchen. Wash your hands after touching animals, cleaning up after pets, changing diapers, or using the bathroom. Salmonella lives in the intestinal tracts of many animals, not just the ones you’re cooking.
Backyard Poultry and Pets
Backyard chickens and ducks are a common and often overlooked source of salmonella. The bacteria live naturally in poultry intestines and can coat feathers, feet, beaks, and eggs even in healthy-looking birds. The CDC links multiple outbreaks each year to backyard flocks.
Always wash your hands with soap and water immediately after handling birds, collecting eggs, or touching anything in or near the coop. Don’t kiss or snuggle poultry, and don’t eat or drink in the area where they roam. Keep coop supplies (feed containers, dedicated shoes) outside the house and clean them outdoors.
Children younger than 5 should not handle chicks, ducklings, or other live poultry at all. Their immune systems are less equipped to fight the infection, and young kids are more likely to put their hands in their mouths. If older children interact with the flock, supervise them and make sure they wash their hands thoroughly afterward.
For eggs from backyard hens: collect them frequently, throw away any that are cracked, and rub off dirt with fine sandpaper or a dry cloth rather than washing with water (cold water can actually pull germs through the shell). Refrigerate them promptly and cook until both yolk and white are firm.
Who Faces the Greatest Risk
Most healthy adults recover from salmonella without treatment. But certain groups face a higher chance of severe illness, including bloodstream infections that require hospitalization. These groups include children under 5 (especially infants under 1), adults 65 and older, adults over 50 with underlying conditions like heart disease, people with weakened immune systems (from conditions like HIV, cancer, diabetes, or organ transplants), and international travelers exposed to unfamiliar food and water sources.
If you’re cooking for anyone in these groups, the precautions above matter even more. Avoid serving undercooked eggs, rare meat, or unpasteurized dairy products. Stick to well-cooked foods, pasteurized eggs in recipes that call for raw preparations, and thorough handwashing throughout meal prep.