Even a single bite can be harmful: Here’s how to protect yourself from foodborne parasites.

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.

3. Unwashed or raw fruits and vegetables

• Leafy vegetables, berries, herbs:   Can   transmit Cyclospora  ,   Giardia  or   Toxoplasma   from contaminated soil or water.

• Even organic products   can become contaminated if they are irrigated with untreated water.

4. Unpasteurized dairy products and juices

• Raw milk, cheese and freshly pressed cider may   contain Cryptosporidium  ,   E. coli  or   Listeria  .

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