Health Alert from Doctors: These 4 Foods May Carry Parasites — Here’s What You Need to Know 
Food safety experts often warn that certain foods, especially when eaten raw or undercooked, may carry parasites that can cause serious health problems. While these foods can be nutritious, improper handling and preparation significantly increase the risk of infection.
Here’s a closer look at four common foods that require extra caution:
1. Raw or Undercooked Fish
Parasites such as Anisakis worms and tapeworms are sometimes found in raw marine fish. Eating contaminated fish can lead to anisakiasis — a painful gastrointestinal infection.
Risk increases with:
Sushi or sashimi made from improperly frozen fish
Home-prepared raw fish
Lightly marinated or undercooked seafood
Safety tip:
Always consume sushi from reputable restaurants that follow proper freezing guidelines. Cooking fish to at least 63°C (145°F) kills parasites.
2. Raw Oysters
Oysters are filter feeders, meaning they absorb substances from surrounding water — including harmful microorganisms and parasites.
Raw oysters may expose you to parasites and dangerous bacteria, especially if harvested from contaminated waters.
Higher risk groups:
People with weakened immune systems
Those with liver disease
Older adults
Safety tip:
Cook oysters thoroughly until shells open and flesh is firm.
3. Crab and Other Crustaceans
Freshwater crabs, in particular, may carry lung flukes (Paragonimus species), which can infect humans if consumed raw or undercooked.
Symptoms of infection may include:
Persistent cough
Chest pain
Digestive issues
Safety tip:
Boil or steam crab thoroughly until meat is opaque and reaches safe internal temperatures.
4. Raw or Undercooked Meat
Beef, pork, and wild game can contain parasites such as:
Toxoplasma
Tapeworms
Trichinella (especially in pork)
Eating rare or undercooked meat increases the risk of parasitic infections that can affect the brain, muscles, and digestive tract.
Safety tip:
Cook whole cuts of beef to at least 63°C (145°F)
Cook ground meat to 71°C (160°F)
Cook pork to 71°C (160°F)
Why This Matters
Parasitic infections can cause:
Severe stomach pain
Diarrhea
Vomiting
Long-term complications if untreated
In many cases, symptoms may appear days or even weeks after exposure.
How to Protect Yourself
Cook seafood and meat thoroughly
Freeze fish properly before eating raw
Wash hands and kitchen surfaces
Avoid cross-contamination
Purchase from trusted suppliers
Important:
This information is for educational purposes only. Not all fish, oysters, crab, or meat contain parasites. When sourced and prepared properly, these foods can be part of a healthy diet. If you experience unusual symptoms after eating raw or undercooked food, consult a healthcare professional immediately.
Taking simple food safety precautions can dramatically reduce your risk — and protect your health long term.
