Yes, cooking meat to the right internal temperature kills parasites. The key word is “right.” A piece of pork that reaches 80°C (176°F) at its core for 10 minutes will have zero viable tapeworm larvae. That same piece cooked to only 40°C (104°F), even for an hour, can leave parasites completely alive and infectious. Temperature and time are what matter, and some cooking methods are far more reliable than others.
The Temperatures That Kill Parasites
Different parasites have different heat tolerances, but they all share a vulnerability: sustained high temperatures destroy them. Tapeworm larvae in pork (Taenia solium) die after 30 minutes at 60°C (140°F), after 20 minutes at 70°C (158°F), and after just 10 minutes at 80°C (176°F). At 50°C (122°F), you need over 40 minutes of sustained core temperature to ensure they’re dead. Below that, cooking has essentially no effect.
Trichinella, the parasite responsible for trichinosis, is hardier. Studies show that free-floating larvae die at 90°C (194°F) held for 15 minutes, while larvae still encysted in muscle tissue require 100°C (212°F) for the same duration to reach a full kill. Toxoplasma gondii, which can infect any warm-blooded animal’s meat, follows a similar pattern: it’s reliably destroyed at standard safe cooking temperatures.
The critical detail in all of this is core temperature, not surface temperature. A steak that’s seared on the outside but cool in the middle hasn’t reached parasite-killing heat where it counts. A food thermometer placed in the thickest part of the meat is the only reliable way to verify safety.
USDA Safe Temperature Guidelines
The USDA sets minimum internal temperatures that account for parasites, bacteria, and other pathogens:
- Whole cuts of beef, pork, veal, and lamb: 145°F (63°C), then rest for at least 3 minutes before cutting or eating.
- Ground meat (beef, pork, veal, lamb): 160°F (71°C), no rest time needed.
- All poultry (whole cuts and ground): 165°F (74°C), no rest time needed.
- Fish with fins: 145°F (63°C), or until flesh is opaque and flakes easily.
The three-minute rest period for whole cuts isn’t just a serving suggestion. During that time, residual heat continues raising the internal temperature slightly, finishing off organisms that may have survived at the lower end of the safe range. Ground meat needs a higher temperature because grinding distributes any parasites or bacteria throughout the meat rather than keeping them near the surface.
Wild Game Carries Extra Risk
Commercially farmed pork in the U.S. is now relatively low-risk for Trichinella thanks to modern farming regulations. The real danger zone is wild game, particularly meat from carnivores and scavengers. Bear, wild boar, wildcat, fox, wolf, seal, and walrus are all known carriers of Trichinella.
Wild game also introduces a complication with freezing. For commercial pork, freezing at -15°C (5°F) for 20 days reliably kills Trichinella worms. But some Trichinella species found in wild animals are freeze-resistant, meaning cold storage alone won’t make bear or wild boar safe to eat. Thorough cooking to safe internal temperatures is the only dependable method for wild game.
Microwaves Are Not Reliable
Microwave cooking is one of the least effective methods for killing parasites and other pathogens in meat. The core problem is uneven heating. Microwaves create hot spots and cold spots throughout the food, and parasites sitting in a cooler zone can survive even when other parts of the meat reach safe temperatures.
Research comparing microwave and conventional oven cooking found that dangerous organisms survived in microwave-cooked minced beef at rare, medium, and even well-done settings. The same organisms were undetectable in meat cooked by conventional oven methods. Even a 30-minute standing period after microwaving didn’t fully eliminate the contamination. If you’re cooking meat specifically to destroy parasites, an oven, stovetop, or grill will give you far more consistent results.
Curing, Smoking, and Drying Don’t Work
Traditional preservation methods like salting, drying, smoking, and making jerky do not reliably kill parasites. The CDC specifically warns that these methods are inconsistent against Trichinella worms, and homemade jerky and sausage have been responsible for multiple trichinosis outbreaks in recent years. Alaska’s state veterinarian has noted that most trichinosis cases she encounters come from improperly cured meat, particularly dried or smoked bear meat and slow-cooker preparations that never reach a high enough core temperature.
If you’re making jerky or sausage from wild game, the safest approach is to cook the meat thoroughly first, then proceed with drying or smoking for flavor and texture. Simply applying salt or smoke to raw meat and hoping for the best is a gamble, especially with bear, boar, or other high-risk animals.
Freezing as a Backup
Freezing can kill many parasites, but it requires colder temperatures and longer durations than most home freezers achieve on a casual basis. Food safety guidelines recognize three effective freezing protocols:
- Standard freezer: -4°F (-20°C) or below for a minimum of 7 days (168 hours).
- Blast freezing: -31°F (-35°C) or below until solid, then held at the same temperature for at least 15 hours.
- Combined method: -31°F (-35°C) until solid, then stored at -4°F (-20°C) or below for at least 24 hours.
These protocols work well for fish (which is why sushi-grade fish is frozen before serving) and for commercial pork. They do not work reliably for wild game due to freeze-resistant Trichinella species. For pork specifically, keeping pieces under 6 inches thick and freezing at 5°F (-15°C) for 20 days is effective against the species most commonly found in domestic pigs.
Practical Takeaways for Your Kitchen
A food thermometer costs a few dollars and removes all the guesswork. Insert it into the thickest part of the meat, away from bone, and verify you’ve hit the target temperature before serving. For whole cuts of beef, pork, or lamb, that’s 145°F with a three-minute rest. For ground meat, 160°F. For poultry, 165°F.
Color is not a reliable indicator. Pork can look pink at safe temperatures, and hamburger can turn brown before reaching 160°F internally. The only way to know is to measure. If you’re cooking wild game, treat it with extra caution: cook it thoroughly, skip rare or medium-rare preparations, and don’t rely on curing, smoking, or freezing alone to handle the parasite risk.