The 6 Pathogens Every Texas Food Handler Must Know
The 6 Pathogens Every Texas Food Handler Must Know
Texas food safety training — and the final test — places special emphasis on six pathogens that pose the greatest risk in food service environments. Health inspectors know them. You should too.
Why These Six?
The FDA Food Code and Texas DSHS identify these pathogens as "the Big 6" because they:
- Spread easily in food service settings
- Cause severe illness even in small amounts
- Are linked to the majority of serious foodborne illness outbreaks
An infected food handler who does not follow proper hygiene can spread any of these to customers.
The Big 6 Pathogens
1. Norovirus
Source: Infected food handlers (fecal-oral route), contaminated produce, shellfish Illness: Nausea, vomiting, diarrhea within 12–48 hours Key fact: Norovirus survives on surfaces for days and is not easily destroyed by alcohol-based hand sanitizer — soap and water are required.
Prevention: Wash hands thoroughly after using the restroom. Stay home if you are vomiting or have diarrhea.
2. Hepatitis A
Source: Infected food handlers, contaminated water, raw shellfish Illness: Liver infection — fatigue, jaundice, nausea; can last weeks Key fact: A person with Hepatitis A is contagious before they show symptoms. Vaccination is the most effective prevention.
Prevention: Thorough handwashing, cooking shellfish to 145°F, excluding ill workers.
3. Salmonella
Source: Raw poultry, eggs, raw meat, unpasteurized dairy, produce Illness: Diarrhea, fever, abdominal cramps within 6–48 hours Key fact: Salmonella is the leading cause of food poisoning deaths in the United States. It is destroyed by proper cooking.
Prevention: Cook poultry to 165°F, eggs to 145°F. Prevent cross-contamination from raw poultry.
4. Shigella
Source: Infected food handlers (fecal-oral route), contaminated water Illness: Severe diarrhea (often bloody), fever, stomach cramps Key fact: Shigella is highly contagious — as few as 10 organisms can cause illness. Poor handwashing is the primary cause of spread.
Prevention: Rigorous handwashing after restroom use. Exclude workers with diarrhea until symptom-free for 24 hours.
5. E. coli O157:H7
Source: Undercooked ground beef, raw produce (especially leafy greens and sprouts), unpasteurized juice Illness: Severe diarrhea (often bloody), abdominal cramps; can cause kidney failure Key fact: Ground beef must reach 155°F for 15 seconds — unlike whole cuts where only the surface matters, grinding distributes pathogens throughout.
Prevention: Cook ground beef to 155°F. Prevent cross-contamination from raw beef. Wash produce thoroughly.
6. Listeria monocytogenes
Source: Ready-to-eat deli meats, hot dogs, soft cheeses, smoked seafood, unpasteurized dairy Illness: Fever, muscle aches; can cause meningitis; dangerous for pregnant women, elderly, and immunocompromised Key fact: Listeria is unusual because it grows at refrigerator temperatures (as low as 32°F). Cold storage alone does not stop it.
Prevention: Keep deli cases at 41°F or below. Follow FIFO rotation. Hold hot dogs and deli meats to 165°F if reheating.
What to Do If You Are Sick
Texas food safety rules require you to report the following to your manager and stay home:
- Vomiting or diarrhea
- Jaundice
- Sore throat with fever
- Diagnosis of any of the Big 6 pathogens
Do not return to work handling food until you are symptom-free for at least 24 hours (or cleared by a healthcare provider for certain diagnoses like Hepatitis A and E. coli O157:H7).
The Bottom Line
Knowing these pathogens is not just required for your food handler exam — it is the difference between a safe kitchen and a foodborne illness outbreak. When you understand where pathogens come from and how they spread, the hygiene rules you follow every shift make instinctive sense.