Even a single bite can be harmful: Here’s how to protect yourself from foodborne parasites.
Foodborne parasites pose a hidden danger in our food. These microscopic organisms—including tapeworms, roundworms, and protozoa—can cause serious illness, sometimes after just a single contaminated bite. Many people consume at-risk foods without a second thought, but knowing where these parasites lurk and how to handle food safely is crucial for protecting your health.
Common parasite-prone foods and risks
1. Undercooked or raw meat and fish
Pork: May contain Trichinella spiralis , the causative agent of trichinosis (muscle pain, fever, swelling).
Beef: Can harbor Taenia saginata (beef tapeworm).
Fish (especially salmon, herring, cod): May contain Anisakis worms, which can cause severe stomach pain, vomiting, and allergic reactions.
Sushi/Sashimi: Risk of parasites unless the fish has been frozen beforehand to kill the larvae.
2. Raw or undercooked shellfish
Oysters, clams, mussels: filter feeders that can ingest parasites such as trematodes from contaminated waters.
Symptoms: Diarrhea, abdominal pain, and sometimes long-term liver or lung complications.
