The USDA says cooking chicken to 165°F kills Salmonella and Campylobacter instantly. That’s the temperature of a hot tub that would melt your eyebrows off. Pasteurization works the same way: heat milk to 161°F for 15 seconds, and the bacteria wave a white flag.
But here’s a surprise: you don’t need a rolling boil to kill most germs. E. coli croaks at 160°F, and Listeria (the fridge lurker) dies at 165°F. It’s like bacteria have a melting point, and 165°F is the lava.
However, if you’re reheating leftover pizza at 200°F for ten minutes, you’re not just killing bacteria—you’re creating a charcoal brick. Your taste buds might file a protest.
Spore-Forming Jerks: The Bacteria That Laugh at Your Oven
Meet Bacillus cereus and Clostridium perfringens. These guys form spores—tough, hibernating shells that survive boiling, baking, and even a microwave’s “popcorn” setting. Heat activates them like a wake-up call. Cook rice and leave it out? The spores hatch and throw a toxin party in your gut.
Fun (or horrifying) fact: Clostridium botulinum—the botulism boogeyman—makes spores that withstand 250°F. That’s why home canners use pressure cookers to reach 240°F or higher. Without pressure, the spores are like tiny hippos in a kiddie pool—they just float.
So, heat can kill most bacteria, but the spores are the final boss in a video game. You need a weapon called “time and temperature.”
Heat Kill Bacteria at George Bousquet blog
