There is an opinion about seafood as an absolutely safe food for a person. Unfortunately, this is not the case at all. In squid, which are a fairly popular food, there are worms and their larvae that live in all their internal organs. Usually worms in squid( in the photo) are found during cleaning in their belly.
Helminths in squid are related to nematodes of the Anisakidae family. After introduction into the human body, anisakidosis is caused - a disease caused by the aforementioned parasites, which is characterized by a gastrointestinal lesion.
Squids are the hosts of these worms, but non-core, and additional. The larvae of anisakid in the mollusk are on the entire surface, throughout the body, inhabiting internal organs. They are located in the cysts - transparent capsules, or can be without them. The average size of cyst anikazid is 3-7 x 1-2 mm( in the upper photo)
Infection with squamous worms is approximately 28%.Immediately after the squid is caught, most of the worms and their larvae begin to actively move. Usually the parasites located on the surface and in the cavities migrate to the organs of the digestion of the mollusc. Therefore, squid must be cleaned immediately after they are pulled out of the water. Due to the timely evisceration of the mollusk, the risk of infection with the worms of the worms is reduced.
Infection occurs when eating shellfish, which are inhabited by parasites that are capable of development and reproduction.
How not to catch worms from squid?
Decontamination of squid from the larvae of anisakid is done by careful thermal treatment - freezing or heating. In solutions of salt and acetic acid, which are usually used for the preparation of squid, larvae of worms do not immediately die, but continue to exist for a certain amount of time - days, months. In squid, parasites die at a temperature of -40 ° C in 40 minutes, at a temperature of -32 ° C in 1.5 hours, and -20 ° C in just a day. Helminths and their larvae withstand a temperature rise up to + 45 ° C.At a temperature of +60 ° C and higher, parasites die within 10 minutes.
Information about infection with anizakidozom first appeared in the middle of the last century in the Netherlands. Today, infection with anisakidosis is observed in many countries. Recently, people often get sick with anisakidosis, as the popularity of eating sea food( fish, squid and other mollusks) is increasing everywhere.
If a person gets into the digestive tract, the worm larvae begin to attach to the gastric mucosa up to its submucosal layer. The worms are located from the oral cavity to the rectum, that is, they inhabit the entire digestive tract. Their favorite place is the wall of the stomach and small intestine. At the site of penetration of worm larvae, inflammation develops, which in the future can lead to rupture of the intestinal wall and intestinal obstruction. It also happens that the larvae of anisakid can migrate to the gallbladder, liver and pancreas, causing inflammation and granuloma formation in these organs.
Worm disease from squid
The incubation period( from invasion of the worm to squid meat into the body to clinical manifestations) can last from several hours to 7-14 days. Symptoms of the disease directly depend on the location of the parasites. With the intestinal location of the larvae, the symptoms are so insignificant that a person may not even pay attention to them.
Since the beloved site of worms is the stomach, the infected person is concerned about abdominal pain, poor health, can vomit and eventually may begin vomiting with the presence of blood in it or without it. The temperature rises to 37.5-38.5 degrees, there is the development of allergies. The main manifestation of allergies is a rash on the skin, a complication is Quincke's edema.
Parasites from seafood can migrate from the stomach to the esophagus, causing symptoms similar to colds: coughing and unpleasant sensations in the throat.
Intestinal form may be asymptomatic, but it is also likely the manifestation of a number of symptoms:
- abdominal pain;
- abdominal discomfort;
- intestinal rumbling;
- of the exhaust gases.
Larvae entering the intestinal tube can mimic surgical pathology. In time, untreated treatment is fraught with chronization of the process.
To severe complications of this disease is the rupture of the intestinal wall. This results in the ingestion of non-sterile contents into the sterile abdominal cavity, causing irritation there. Further, inflammation of the peritoneum, that is, peritonitis, develops.
In addition to squid worms are also in shrimps. They also parasitize anizakidy, the infection of which can be observed the above described symptoms.
It is very important before eating seafood such as squid and shrimp, to perform their thorough cleaning and heat treatment. If you buy frozen prawns, it is better to boil them for 7-10 minutes to avoid infection with worms and the consequences to which it can lead.