How Long Does it Take to Kill Bacteria and Pathogens
The safety of cooked meat is not about hitting one magic number like 165°F. It is about temperature and time working together. Hold meat at a lower temperature long enough and it is every bit as safe as a quick blast to 165°F – and dramatically juicier. Here is exactly how long it takes to kill bacteria at every temperature, straight from the USDA’s own lethality data.
The short answer: temperature and time work together
Bacteria like Salmonella, E. coli, and Listeria do not have a single “death temperature.” They die faster as the heat climbs. At 165°F they die instantly; at 145°F it takes a few minutes; at 130°F it takes a couple of hours. This is the time-temperature relationship, and it is the reason chicken cooked to 150°F and held there is perfectly safe. Two numbers decide safety:
- The internal temperature the meat actually reaches
- How long it stays there (the dwell or hold time)
Reach a high enough temperature, or hold a lower one long enough, and you achieve the exact same kill.
How long does it take to kill bacteria at each temperature?
The tables below come from the USDA FSIS Cooking Guideline for Meat and Poultry Products (Revised Appendix A, 2021) – the same lethality standard commercial processors are held to. They show the hold time needed at each internal temperature for a 7-log reduction (a ten-million-to-one kill) of Salmonella, the most heat-resistant of the common pathogens. Kill Salmonella and you have killed E. coli and Listeria along with it.
| Internal temperature | Time to kill bacteria |
|---|---|
| 165°F (74°C) | Instant |
| 160°F (71°C) | About 14 seconds |
| 155°F (68°C) | About 45 seconds |
| 150°F (66°C) | About 3 minutes |
| 145°F (63°C) | About 9 minutes |
| 140°F (60°C) | About 26 minutes |
| 136°F (58°C) | About 1 hour |
| Internal temperature | Time to kill bacteria |
|---|---|
| 158°F (70°C)+ | Instant |
| 155°F (68°C) | About 23 seconds |
| 150°F (66°C) | About 1 minute |
| 145°F (63°C) | About 4 minutes |
| 140°F (60°C) | About 12 minutes |
| 135°F (57°C) | About 37 minutes |
| 130°F (54°C) | About 2 hours |
How long at 150°F to kill bacteria?
At a steady internal temperature of 150°F, poultry is safe after about 3 minutes, and beef, pork, or lamb after about 1 minute. That is why chicken pulled at 150°F and rested, or held in a sous vide bath, is fully safe and far juicier than chicken driven to 165°F.
How long at 140°F to kill bacteria?
140°F is the low end of the safe range. Hold poultry at a true 140°F internal for about 26 minutes, or beef, pork, and lamb for about 12 minutes, to fully pasteurize it. Below about 130°F bacteria are not reliably killed at all – and between 40 and 130°F they actively multiply – so 130°F is the practical floor and food should not linger in that danger zone for more than a few hours total.
What temperature kills bacteria instantly?
The kill is effectively instant (0 seconds) at 165°F for poultry and 158°F for beef, pork, and lamb. Those thresholds are exactly why the familiar USDA consumer targets exist. But as the tables show, you do not have to reach them – a lower temperature held long enough gets you to the same place.
At what temperature does E. coli die?
E. coli – including the dangerous O157:H7 strain found in ground beef – is slightly less heat-tolerant than Salmonella, so any time-and-temperature combination that kills Salmonella kills E. coli too. The beef table above covers it. For ground beef, the USDA consumer recommendation is 160°F (an instant kill); for whole cuts, 145°F with a 3-minute rest.
Why you should not overcook for “safety”
Higher temperatures make muscle fibers contract and squeeze out moisture – that is why chicken taken to 175°F is dry while chicken finished at 160°F stays juicy. Because virtually all pathogens are already dead at 165°F (and well before that if you hold the temperature), cooking hotter buys you no extra safety, only dryness. Understanding time and temperature lets you cook to a lower, juicier finish and stay completely safe.
The safe internal temperatures to remember
If you would rather not track dwell time, these instant-kill USDA minimums always work:
- Poultry (whole or ground): 165°F
- Ground beef, pork, lamb: 160°F
- Steaks, roasts, chops (whole cuts): 145°F + a 3-minute rest
- Fish: 145°F
That 3-minute rest is not just for juiciness – the meat keeps pasteurizing while it sits.
See it for yourself
Here is an interactive chart of the time and temperature combinations needed to kill E. coli, Salmonella, and Listeria:
Pathogen Thermal Death Curves (D-values)
🥩 Meat Smoking Safety Tips:
- Use a Meat Thermometer: Always verify internal temperature - color is not a reliable indicator of doneness.
- The 40-140°F Rule: Meat should pass through the danger zone (40°F-140°F) within 4 hours to prevent bacterial growth.
- Low & Slow Considerations: When smoking at low temperatures (225°F-275°F), ensure your smoker maintains consistent heat.
- Rest Time Matters: Carryover cooking continues after removal - factor this into your target temperature.
- Cured vs Uncured: Properly cured meats (with nitrates/nitrites) have additional protection against certain bacteria like Clostridium botulinum.
🔬 Pathogen Categories:
- Vegetative Bacteria: E. coli O157:H7, Salmonella, Listeria, Campylobacter, S. aureus - killed at cooking temperatures (145-165°F)
- Parasites: Trichinella spiralis - found in pork and wild game; killed at 137°F (58°C) or above; USDA recommends 145°F+ for pork
- Bacterial Spores (toggle to show): C. botulinum - extremely heat-resistant, a concern for canning and vacuum-sealed cured meats; requires autoclave temperatures (250°F/121°C+)
⚠️ Important Notes:
- Understanding D-Values: This chart shows D-values (decimal reduction time) - the time required at a given temperature to reduce pathogen population by 90% (1-log). For a 6-log reduction (99.9999% kill), multiply the D-value by 6.
- Food Safety for Smoking: USDA recommends internal temperatures of 165°F (74°C) for poultry, 145°F (63°C) for whole cuts of beef/pork/lamb with 3-minute rest, and 160°F (71°C) for ground meats. The "danger zone" (40°F-140°F / 4°C-60°C) should be passed through as quickly as possible.
- Pasteurization: Standard milk pasteurization is 72°C (161°F) for 15 seconds or 63°C (145°F) for 30 minutes.
- Staphylococcus Toxins: While S. aureus bacteria can be killed by heat, the toxins they produce are heat-stable and may remain even after cooking.
- The following require extreme heat to kill. To destroy these, you'd basically need to turn your meat into charcoal:
- Bacterial Spores: Some spores (Clostridium, Bacillus) can survive boiling and require pressure cooking/autoclaving at 121°C (250°F) for extended periods. Use the "Show Bacterial Spores" toggle to display these on the chart.
- Prions (e.g., CJD, Mad Cow Disease): Extremely heat-resistant. Require autoclaving at 134°C (273°F) for 18 minutes or longer, or chemical treatment. Not killed by normal cooking.
📋 Disclaimer from MeatSmokingCalculator.com
This chart is provided for educational and informational purposes only. While we strive for accuracy, this information should not be used as a substitute for official food safety guidelines. When smoking meat, always use a reliable meat thermometer and follow established safe internal temperature guidelines. We strongly recommend following the food safety guidelines provided by the FDA. For complete and up-to-date food handling recommendations, please visit: FDA Safe Food Handling Guidelines
📚 Scientific References:
Data in this chart is derived from peer-reviewed studies and government guidelines. Times shown are D-values (time for 1-log or 90% reduction). For complete pathogen elimination, multiply by 6-7.
- E. coli O157:H7: Juneja et al. (1997) Int J Food Microbiol; Stringer et al. (2000) J Appl Microbiol
- Salmonella & Listeria: McMinn et al. (2018) Meat & Muscle Biology
- USDA Thermal Guidelines: FSIS Cooking Guideline (Appendix A)
- Trichinella: Kotula et al. (1983) Exp Parasitol; FSIS Trichinella Guidelines
- C. botulinum spores: Odlaug & Pflug (1978) Appl Environ Microbiol
- FDA Safe Food Handling: FDA Food Safety Guidelines
Frequently asked questions
How long does it take for bacteria to die?
It depends entirely on the temperature. At 165°F most foodborne bacteria die in seconds. At 150°F it takes 1 to 3 minutes; at 140°F, roughly 12 to 26 minutes; at 130°F, up to two hours. The hotter the meat, the faster the kill.
What temperature kills bacteria in meat?
Bacteria begin to die around 130°F and are killed almost instantly at 158°F for beef, pork, and lamb, and at 165°F for poultry. Between those points, the lower the temperature, the longer you must hold it – see the tables above.
How long at 150 to kill bacteria?
About 3 minutes for chicken and turkey, and about 1 minute for beef, pork, and lamb, once the meat’s internal temperature is a steady 150°F throughout.
How long at 140 to kill bacteria?
About 26 minutes for poultry and about 12 minutes for beef, pork, and lamb held at a true 140°F internal temperature.
Does holding meat at a low temperature really make it safe?
Yes. This is the science behind sous vide and low-and-slow barbecue. As long as the meat reaches and holds the temperature for the time shown in the USDA tables above, it is fully pasteurized – even at 140 to 150°F.
At what temperature does E. coli die?
E. coli is killed by anything that kills Salmonella, so the beef table above applies. For ground beef, 160°F kills it instantly; for whole cuts, 145°F held about 4 minutes, or the USDA’s 145°F plus a 3-minute rest.
Is it safe to eat chicken cooked below 165°F?
Yes, if you hold the temperature long enough. Chicken held at 150°F for about 3 minutes, or 145°F for about 9 minutes, is just as safe as chicken flashed to 165°F – and much juicier. The meat must actually reach and hold that internal temperature throughout.
Source: Hold times are drawn from the USDA FSIS Cooking Guideline for Meat and Poultry Products (Revised Appendix A, 2021), Tables 2-4, for a 7-log reduction of Salmonella. Times vary slightly with fat content; higher-fat cuts sit at the longer end. Always use a calibrated thermometer in the thickest part of the meat.