Monday, January 30, 2012

Whales and worms

Where there's a worm there's a whale: First distribution model of marine parasites provides revealing insights

Apart from not finding it particularly flavoursome, I've always been a bit leery of raw fish because of the small risk of getting infected with a nematode.

According to this article above:
Eating infected fish and fish-based products can lead to so-called anisakiasis. This illness often occurs in regions in which raw or semi-cooked fish is traditionally consumed. Symptoms include severe stomach pains, nausea, diarrhea, vomiting and fever, or even severe allergic reactions. Around 20,000 people are affected throughout the world each year, with a growing tendency. Hotspots include the coastal regions of Europe, the USA, as well as Japan and developing countries, in which fish and seafood are an important source of protein.
Interestingly, the nematode can pass through several species, but ends up breeding via those big, loveable whales:
The marine parasites have a complex lifecycle, in which they frequently change host. The final hosts for each species are Baleen and toothed whales (so-called cetacea), which absorb the parasite with their food and act as its host until sexual maturity...

On the way to the whale, fish, cephalopods and crabs act as intermediate hosts for the parasites.
Until we live in a world where whales are given giant worming tablets, like our pet dogs and cats, I'll stick to cooked fish, thanksg

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