Can I eat hot dogs while pregnant?

The verdict

Yes, if they are steaming hot. Not if they are warm.

Hot dogs are one of the few foods named individually in American pregnancy guidance. The FDA's listeria advice lists hot dogs, deli meats and luncheon meats among foods to avoid unless they are reheated until steaming hot, and names hot dogs among the foods through which listeriosis is contracted. ACOG gives the identical instruction: avoid hot dogs and luncheon meats unless they are heated until steaming hot just before serving.

UK advice does not name hot dogs specifically, but it does not need to. The NHS lists any processed, cold pre-cooked meats among foods to be careful with, to be kept chilled and eaten before the use-by date, and a hot dog sausage is exactly that until you heat it. FSANZ puts cold ready-to-eat meats in its higher-risk table, with freshly cooked or thoroughly reheated to steaming hot as the alternative.

So the answer is not about the sausage. It is about the temperature it reaches before it gets to you.

Why an already-cooked sausage needs cooking again

This is the part that puzzles people, and it is worth understanding because the same logic covers deli meat, cooked chicken and pre-cooked prawns.

Hot dog sausages are fully cooked during manufacture. They are then packed and refrigerated, and they sit in that state for weeks. Listeria is unusual among food poisoning bacteria in being able to grow at refrigerator temperature, so any contamination introduced after the cooking step, during packing, slicing or handling, has a long cold window in which to multiply.

The FDA describes listeria as a bacterium found in refrigerated, ready-to-eat foods such as meat, poultry, seafood, dairy and produce, and notes that unlike many other foodborne bacteria it can grow in cold temperatures, including inside refrigerators.

Reheating removes the problem. Heat kills listeria; refrigeration only slows it.

How hot is hot enough

Steaming hot is a genuine standard, not a hedge. FSANZ specifies reheating thoroughly until steaming hot at 75C. The FSA's cooking guidance says the middle of the food should reach 70C for two minutes, or an equivalent combination such as 75C for 30 seconds, and gives the visual cue of steam rising from the surface and from the middle when cut into.

For a hot dog that means boiling or simmering in water for several minutes, grilling until the skin blisters and the centre is hot, or microwaving until it steams. It does not mean a sausage that has been sitting in a lukewarm water bath at a stadium or a street stand, or one rolled on a warmer for an hour.

The reliable test is your mouth: a properly reheated hot dog is uncomfortably hot in the middle, not pleasantly warm. If you can eat it straight away without waiting, it probably has not been heated enough.

Stands, stadiums and warming trays

This is where the practical risk sits. A hot dog cooked to order and served immediately is fine. A hot dog that has been held is the one the guidance is written about.

FSANZ describes the danger zone as 5C to 60C and advises limiting the time food spends there. The FSA's advice is that ready-to-eat food should be eaten within four hours of leaving the fridge, or within two hours on a very warm day, and that food should be kept either properly cold or properly hot, not lukewarm.

Roller grills, water baths and warming drawers are designed to hold food hot, and when they are working properly they do. When they are set low, or the sausage has been at the cool end for an hour, they hold food warm instead, which is worse than either extreme.

A reasonable approach at a stand is to ask for one straight from the boiler or the grill rather than from the holding tray, and to say you would like it hot. At home there is no ambiguity: heat it until it steams.

The bun, the onions and the sauces

Once the sausage is dealt with, the rest of a hot dog is mostly unremarkable.

Fried onions are cooked. Raw onions and salad garnishes fall under the general advice to wash salad vegetables thoroughly before eating; the NHS names salads among foods to be careful with for that reason.

Ketchup and mustard are shelf-stable and unrestricted. Mayonnaise-based sauces made commercially are made with pasteurised egg; the FDA notes commercial mayonnaise, dressing and sauces contain pasteurised eggs that are safe to eat, and FSANZ lists commercial dressings such as mayonnaise and aioli among safer alternatives. A homemade aioli at a street food stall is a different question and belongs with egg advice.

Cheese sauce on a hot dog is cooked and hot. Cold crumbled cheese added at the end follows cheese advice, which for a hard or pasteurised cheese is unrestricted.

Salt, nitrite and how often

The safety answer here is about temperature. The dietary answer is about frequency.

Hot dogs are processed meat, high in salt and saturated fat. UK healthy eating advice sets the adult salt limit at 6g a day, and NHS pregnancy diet advice is to eat a balanced diet and to limit foods high in fat, salt and sugar. There is no pregnancy-specific limit on processed meat published by any of the authorities on this page, so this is general dietary advice rather than a pregnancy restriction.

Vegetarian and vegan hot dogs are not meat, so the toxoplasma question does not arise, but chilled ready-to-eat plant-based sausages are still chilled ready-to-eat foods. Heat them the same way.

If you have eaten a lukewarm one

One hot dog that was not hot enough is a low risk. Listeriosis is rare, and the NHS's general position is that a small amount of a food that should have been avoided, if you did not become ill, is unlikely to affect your baby.

What matters is the following weeks, because listeria has a long incubation. ACOG says symptoms may appear as late as two months afterwards and lists fever, chills, muscle aches, diarrhoea or upset stomach, progressing in serious cases to stiff neck, headache, confusion and loss of balance. Its advice if you think you have eaten something that puts you at risk of listeriosis is to talk with your obstetrician, who can monitor symptoms and decide whether you need testing.

Contact your midwife or GP the same day if anything appears, and mention the hot dog. Listeriosis is confirmed on a blood culture and treated with antibiotics.

Where guidance differs

On the substance, not much. The US names hot dogs explicitly and requires reheating. Australia, New Zealand and the UK cover them within cold ready-to-eat meat advice, which produces the same instruction. Ireland's HSE names ready-to-eat sliced meat and advises avoiding deli counters, and its general rule is that all meat should be cooked thoroughly.

The only real difference is emphasis. American guidance singles out hot dogs because American listeriosis outbreaks have involved them, which is a good reason to take the reheating instruction seriously wherever you live.