Brazilian study finds parasitic worms in 96% of skipjack tuna sampled
Researchers at the Federal University of Santa Catarina examined 53 skipjack tuna caught off southern Brazil and found more than 1,600 worms across the fish, with 96% carrying at least one parasite. The intestines were most heavily infested, followed by the edible muscle tissue and the stomach, while only the heart and kidneys were consistently parasite-free. The team identified two dominant parasite genera, Trypanorhyncha and Anisakis, and published the findings in Ocean and Coastal Research.
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Skipjack tuna is a commercially important species widely used in sashimi and canned products, so high parasite loads in muscle tissue raise food-safety questions even though the sample size was small and limited to one location and time. The authors argue the results justify stricter sanitary inspection and immediate evisceration of catches to stop larvae migrating from internal organs into the flesh people eat.
- 96% of 53 sampled skipjack tuna were infected with parasitic worms
- Muscle tissue, the part typically eaten, was the second most infected organ after intestines
- Study authors recommend immediate evisceration and stronger sanitary inspection to limit larval migration
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Published there as: “Scientists Find Worms in Almost Every Fish in a Tuna Haul – 96% Were Infected”
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