The first parasite poisoning from anisakis recorded in the country is causing serious concern, as a 22-year-old from Thessaloniki developed acute symptoms after consuming sushi. The incident confirms the growing risk hidden in raw or undercooked fish, as they serve as the main carrier of this specific nematode parasite.
Anisakis symptoms and how they manifest
According to reports, the parasite is found in raw or unprocessed fish and in foods that have not been properly heated. Anisakiasis is associated with acute gastrointestinal symptoms, such as abdominal pain, diarrhea, nausea and vomiting. The parasite attaches to the walls of the esophagus, stomach or intestine causing significant inflammation.
The CDC reports that individuals with anisakiasis may present symptoms such as abdominal pain, nausea, vomiting, abdominal distension, diarrhea, blood and mucus in stool, as well as mild fever. In some cases, allergic reactions also appear, such as rashes, itching and rarely anaphylaxis. Some people even feel a tingling sensation during or after consuming raw fish due to the movement of the worm in the mouth or throat.
Anisakis transmission and how it reaches humans
The parasite is mainly found in areas where consumption of raw fish is common, such as Japan, but is now also detected in Europe, USA and South America. Anisakis develops in the sea through infected marine mammals that release eggs into the water. The eggs develop into larvae, which are eaten by crustaceans and subsequently by fish or squid.
When humans consume raw or poorly cooked fish that have been infected, the larvae invade the gastrointestinal system causing inflammation. The parasite eventually dies, but by then it has already created serious discomfort. It is important to note that anisakiasis is not transmitted from person to person.
