Can I eat queso fresco while pregnant?

The verdict

If you are in the United States, the answer is no, and it is the one place where American pregnancy advice is stricter than British advice about a cheese.

The FDA recommends that people vulnerable to listeriosis, which includes pregnant women, avoid all queso fresco-type cheeses. Critically, it applies that advice to cheeses made from either pasteurised or unpasteurised milk. Everywhere else in the FDA's guidance, pasteurisation is the test; this is the single exception.

The category covers queso fresco, queso blanco and requeson, and cheeses of similar style. The FDA notes these may be labelled Latin-style, Hispanic-style or Mexican-style cheeses depending on country of origin.

UK, Irish, Australian and New Zealand guidance does not name these cheeses. Under NHS rules a pasteurised rindless fresh cheese is on the safe list; under FSANZ rules a soft cheese belongs in the higher-risk group with everything else soft. Neither system has a queso-specific rule.

Why the FDA singles them out

The reasoning is unusually explicit, and it is worth reading because it explains the whole shape of the advice.

First, the food itself. The FDA describes queso fresco-type cheeses as soft fresh cheeses that do not go through a significant ageing or ripening process, with a short shelf life, and states they are high in moisture and low in acidity, which provides a favourable environment for the growth of listeria. Listeria also thrives in cold environments including inside refrigerators, so time in the fridge works against you rather than for you.

Second, the manufacturing route. The FDA acknowledges that most queso fresco-type cheeses sold by retailers are pasteurised and that pasteurisation is incredibly effective at eliminating listeria, then makes the point that decides the advice: cheeses made with pasteurised milk can become recontaminated with listeria if the manufacturing environment is unsanitary. Pasteurisation protects the milk, not the cheese that is made afterwards.

Third, the outbreak record. The FDA states that listeriosis outbreaks have been repeatedly linked to people eating queso fresco-type cheeses, and that is why it recommends avoidance. This is advice driven by what has actually happened, not by a laboratory property.

Who is most affected

The FDA's figures are stark. In the United States, the risk of a pregnant woman getting listeriosis is about ten times greater than that of the general population, because the immune system is altered during pregnancy. For Hispanic women the figure rises to about twenty-four times, and the FDA links that directly to increased consumption of foods highly susceptible to listeria contamination, like queso fresco-type cheeses.

That is not a comment about diet quality. It is a reason the FDA has put dedicated consumer guidance behind this one category rather than folding it into general cheese advice.

What listeriosis does

The reason a rare illness gets this much attention is the outcome. The FDA states that during pregnancy symptoms may be mild or even unnoticed but can lead to severe outcomes such as miscarriage, stillbirth, premature delivery, or a life-threatening infection in the newborn.

ACOG describes the same picture: mild flu-like symptoms including fever, chills, muscle aches and diarrhoea or upset stomach, and possibly a stiff neck, headache, confusion or loss of balance, with symptoms appearing as late as two months after eating contaminated food. ACOG adds that even if you do not feel very sick, you can pass the infection to your fetus.

It is treatable. If testing confirms listeriosis, antibiotics are used to treat the infection and protect the pregnancy. That is why saying what you ate matters.

How to eat it safely instead

Cooking works. The FDA's advice for people at higher risk who choose to continue eating these cheeses is to cook the cheese as part of the dish, to a minimum internal temperature of 165F, which is 74C.

That covers queso fresco pan-fried until it browns, crumbled into a filling that is then baked through, melted into a hot sauce that is brought back to a simmer, or added to a soup that is still boiling. It does not cover queso fresco crumbled over hot tacos at the table, sprinkled on elote, stirred into a warm salsa off the heat, or served on a cold salad.

If you are buying it anyway, the FDA lists what to look for: sealed, unopened packaging; a clear manufacturer name and contact information; a use-by or best-if-used-by date; and a label clearly identifying it as made with pasteurised milk. It advises against buying cheese that is not refrigerated or does not feel cold to the touch, or where the packaging appears swollen or bloated.

Its storage advice is to refrigerate at or below 40F, which is 4C, in the original unopened packaging, to use the cheese as soon as possible after purchase, not to keep leftovers once opened, and to discard cheese that has been in the danger zone between 4C and 60C for longer than two hours.

If you have already eaten some

One portion is a low risk. Listeriosis is rare in absolute terms even among people who eat higher-risk foods, and the NHS's general position on foods that should have been avoided is that a small amount, if you did not become ill, is unlikely to affect your baby.

What to do is watch and speak up. ACOG's advice if you know you have eaten a food involved in a listeria outbreak, or think you ate something that puts you at risk, is to talk with your obstetrician, who can monitor your symptoms and decide whether you need to be tested. Do that rather than waiting to feel unwell, and mention the specific cheese, because listeriosis is diagnosed on a blood culture that nobody orders without a reason to.

Where guidance genuinely differs

This is the sharpest transatlantic disagreement about a single cheese on this site. The FDA rules out an entire category regardless of pasteurisation, on outbreak evidence. ACOG's own list is milder, naming queso blanco among soft cheeses to avoid in the context of raw milk and stating that soft cheeses made with pasteurised milk are safe, so even within the US the two documents are not identical in emphasis.

The NHS does not name these cheeses. A pasteurised, rindless fresh cheese meets its definition of a safe soft cheese, so British advice as written would permit it. Ireland's HSE list names unpasteurised dairy, mould-ripened cheese and blue cheese, and nothing else relevant. FSANZ would fold it into soft cheese generally and ask you to cook it to 75C, which lands close to the FDA's 74C by a different route.

If you eat these cheeses regularly, the FDA's guidance is the one written with your food in mind, and the cooked route is the one that keeps them on the table.