Be Careful With These Foods: Some Can Carry Parasites If They’re Raw or Undercooked

Some foods can carry parasites or harmful microbes when eaten raw or insufficiently cooked. Knowing which foods need extra care can help reduce preventable foodborne infections.

Many foods that appear fresh and harmless can still carry microorganisms or parasites when they come from contaminated water, soil, or animals. The article shown in the source material highlights several foods that deserve particular attention, especially when they are eaten raw or only lightly cooked.

The important point is not that these foods are inherently dangerous. Many are nutritious and commonly eaten around the world. The risk largely depends on where they come from, how they are handled, and whether they are thoroughly cooked.

1. Freshwater snails

Freshwater snails are popular ingredients in many Asian cuisines. They can be boiled, steamed, stir-fried or added to soups. However, freshwater environments can expose snails to parasites and other microorganisms.

This is why proper cleaning and cooking are important. Vietnamese culinary sources, for example, describe soaking and thoroughly washing snails before cooking them, followed by boiling or other heat treatment.

Eating inadequately cooked freshwater snails may increase the risk of foodborne infection. Rather than avoiding the food altogether, consumers should obtain snails from reliable sources and make sure they are cooked thoroughly.

2. Raw or undercooked fish

Fish is another food that requires particular caution when consumed raw. Some freshwater fish can carry parasites, while poor handling can also introduce harmful bacteria.

Raw fish should therefore come from appropriate sources with strict temperature control and hygienic preparation. Freshwater fish intended for raw consumption can present additional risks, which is why some food-safety authorities have imposed restrictions on their use in ready-to-eat raw dishes.

3. Raw or undercooked meat

The original article also draws attention to raw or insufficiently cooked animal products. Beef and other meats can become contaminated during slaughter, processing or preparation.

Cooking meat thoroughly is one of the simplest ways to reduce the risk of foodborne illness. People should also avoid cross-contamination by keeping raw meat separate from ready-to-eat foods and washing utensils and preparation surfaces carefully.

4. Raw seafood, shrimp and shellfish

Shrimp, crabs and other seafood can also carry harmful microorganisms when raw or inadequately cooked. Marinating seafood in alcohol, vinegar or acidic sauces does not necessarily make it safe.

Proper cooking remains the more reliable approach. Seafood should be handled hygienically, kept properly chilled and cooked according to appropriate food-safety practices.

5. Water-grown vegetables

The article also mentions vegetables such as watercress. Fresh vegetables can become contaminated through soil, irrigation water or contact with contaminated surfaces.

Watercress is nutritious and widely used in soups and salads, but it should be carefully washed before preparation.

The safest approach

The message is not to fear these foods. Instead, pay attention to source, storage, preparation and cooking. Foods from questionable sources deserve extra caution, particularly when they are eaten raw.

For seafood, meat and freshwater organisms, thorough cooking is generally a much safer choice than relying on appearance, smell or marinades. For vegetables, washing them carefully under running water can remove dirt and some surface contamination, although washing cannot eliminate every possible pathogen.

Food safety is especially important for young children, older adults, pregnant people and anyone with a weakened immune system.

Ultimately, the headline may sound alarming, but the practical lesson is straightforward: choose reputable food sources, prevent cross-contamination, keep perishable foods properly chilled, and cook foods that carry a higher risk of parasites or harmful microorganisms thoroughly.