Bacteria
Campylobacter: The Most Common Foodborne Illness Most People Have Never Heard Of
Campylobacter causes 1.5 million US infections per year, more than Salmonella. Learn its sources, symptoms, and the rare complication that can follow it
BeginnerClostridium perfringens: The Cafeteria Germ That Loves Slow-Cooled Food
Clostridium perfringens causes nearly a million US food poisoning cases a year, almost always from big batches of meat and gravy cooled too slowly.
IntermediateCross-Contamination: How Foodborne Illness Actually Spreads
Cross contamination prevention starts with understanding how pathogens move through your kitchen. Here's the science behind safe food handling.
BeginnerDoes Washing Produce Remove Pesticides and Bacteria?
Does washing produce remove pesticides and bacteria? USDA and FDA research on what cold water washing actually does, and why commercial produce washes don't help
BeginnerE. Coli in Food: Why O157:H7 Is So Dangerous
E. coli O157:H7 produces Shiga toxins that can cause kidney failure in children. Learn where it comes from, why ground beef is high risk, and how to prevent it.
BeginnerFermentation: How Microbes Transform Your Food
Fermentation is how microbes convert carbohydrates into acids, alcohol, and CO2, transforming ordinary ingredients into complex, flavorful foods. Here's how it works
BeginnerFood Safety Fundamentals: The Science Behind Keeping Food Safe
Food safety isn't just rules. It's biology. Learn the science behind the four core principles and why they actually work to keep food safe.
BeginnerFreezing and Thawing: What Happens to Food at the Molecular Level
Does freezing kill bacteria? No, and that changes everything about how you thaw food safely. Here's the molecular science behind freezing and food safety.
BeginnerHow to Cool Food Quickly: The 2-Stage Cooling Rule
How to cool hot food safely using the 2-stage USDA cooling rule, why ice baths beat the fridge for large batches, and why 'let it cool first' is wrong
BeginnerLacto-Fermentation vs Other Fermentation Types: The Microbiology Explained
How lacto-fermentation differs from yeast and acetic acid fermentation, why salt selects for LAB, and the distinct microbial worlds inside kimchi, sourdough, kefir, and kombucha
AdvancedListeria in Food: Why This Pathogen Is Different and More Dangerous
Listeria monocytogenes grows in your refrigerator. It kills 1 in 5 people it infects. Here's the science behind why it's so dangerous and what to avoid.
IntermediateMicrowave Food Safety: The Hot Spot Problem and How to Fix It
Microwaves kill bacteria through heat, not radiation, but cold spots can leave food unsafe. Learn the standing time rule, temperature targets, and what to never microwave
BeginnerPlastic vs Wood Cutting Boards: What the Food Safety Research Actually Shows
Plastic vs wood cutting board food safety: what Dean Cliver's 1994 UC Davis research found, what FDA recommends, and what actually matters for home kitchens
BeginnerRaw Milk: Unpasteurized Science
Is raw milk safe? We look at what the evidence actually says about pasteurization, nutrition claims, and the real pathogen risks of unpasteurized milk.
BeginnerSalmonella in Food: Sources, Symptoms, and How to Prevent It
Salmonella causes 1.35 million US infections yearly. Learn where it hides, why eggs are a special case, and the temperatures that kill it.
BeginnerSlow Cooker Safety: How to Use One Without Getting Sick
How slow cookers stay safe despite low temperatures, why you should thaw meat first, and the food safety rules for filling, holding, and storing slow-cooked food.
BeginnerStaph Food Poisoning: Why It Hits Fast and Why Reheating Won't Help
Staph aureus food poisoning hits within 1-6 hours and reheating won't help. Learn why its toxins survive cooking and which foods carry the highest risk
IntermediateThe Temperature Danger Zone: 40°F to 140°F Explained
The temperature danger zone is 40°F to 140°F (4°C to 60°C). Food left in this range allows bacteria to multiply to dangerous levels. Here's the science behind the rule.
BeginnerYour Gut Microbiome: A Beginner's Guide to the Ecosystem Inside You
Learn what the gut microbiome is, what it does, and what the science actually says about probiotics, prebiotics, and diet.
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