Sort ByRelevance
  • Ingredients
  • Diets
  • Allergies
  • Nutrition
  • Techniques
  • Cuisines
  • Time

Herringworm disease

  1. The herring worm, also called Anisakis, is a wormlike animal. Herring worm infection occurs by eating raw or undercooked fish, leaving the herring worm larvae alive. Herring worm can cause serious illness. Allergic reactions can also occur due to the herring worm.

Herring worm

  1. The herring worm, also called Anisakis, is a wormlike animal. It belongs to the roundworm group. It is thin and white or colorless. They live in marine fish and marine mammals. Herring worm larvae are often eaten by shellfish. These infected shellfish are in turn eaten by marine fish. The larvae then settle in the wall of the fish's intestine. Sometimes they also nest in a muscle or in the skin. The larva can grow up to two inches long, depending on its diverse hosts. The larva often comes out with the faeces.

Infection in humans

  1. Herring worm infection occurs by eating raw or undercooked fish, so that the herring worm larvae are still alive. Herring worm infection is the most common in four countries:


  1. Herring worm can become very ill. The first symptoms appear within a few hours, which can be very severe. But sometimes the symptoms only appear after 1 to 2 weeks, when the larvae in the intestines only provoke a reaction from the body. The symptoms that arose:

Allergic reaction

  1. Allergic reactions can also occur as a result of the herring worm. This is because they release a biochemical. Asthma can develop in response to this.


  1. An X-ray or an endoscopy can be used to determine whether there is an infection with the herring worm. The larvae can be removed with the aid of a gastroscope. When the larvae have caused ulcers or swelling, surgery will be necessary. In most cases, however, the larvae will disappear on their own in the stool or the body's immune system kills the larvae.

Rules in the Netherlands

  1. In the Netherlands, all herring caught must, since the year 1968, be frozen at least 20 degrees Celsius for at least 24 hours. This will kill the larvae. In other countries it is maintained for 7 days or fifteen hours at -35 degrees Celsius. In the Netherlands, all herring must in any case be treated in this way. As a result, contamination with the herring worm rarely occurs. Brining the raw fish (salts) does not kill the larva.


  1. Raw fish must be well cooked or fried so that the larvae die. Be careful not to eat raw fish in other countries, where it is not known whether it is also frozen before being sold. In Japan, this contamination is fairly common after knowing about sushi, which is raw fish in the form of mackerel cod, squid or whale meat. By the way, marine mammals are also often infected with the herring worm, because they eat infected fish and shellfish.

Donate - Crypto: 0x742DF91e06acb998e03F1313a692FFBA4638f407