What Pinworms Look Like In Humans: Larvae And Adults, Eggs

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What Pinworms Look Like In Humans: Larvae And Adults, Eggs
What Pinworms Look Like In Humans: Larvae And Adults, Eggs
Video: What Pinworms Look Like In Humans: Larvae And Adults, Eggs
Video: Pin worms eggs see what they look like and avoid 2023, February

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  • What pinworms look like: appearance
  • Internal structure of pinworms
  • What pinworm eggs and larvae look like
  • What pinworms look like in feces
  • Pinworms on the bottom of a child and an adult
  • You can defeat parasites!

Enterobiasis is a disease that is triggered by infection with pinworms, the most common group of roundworms. They live in the human intestine. Infection can occur anywhere for various reasons.

The parasite has unique structural features that allow it to be in the human body for a long time. More details on how pinworms look will be discussed in this article.

What to do in such a situation? To get started, we recommend reading this article. This article details the methods of dealing with parasites. We also recommend contacting a specialist. Read the article >>>

What pinworms look like: appearance

Pinworms belong to the group of nematodes, are small and white in color. Females grow up to 10 mm in length, males - 5 mm. The back of the female has a pointed end, while in males it is rounded towards the belly.

Pinworm larvae
Pinworm larvae


On the head, around the mouth of the parasite, a vesicle is located - this is a small swelling that allows the pinworm to attach to the intestinal walls.

Internal structure of pinworms

The internal structure of the parasite is characterized by the presence of the following organs:

  • mouth;
  • pharynx;
  • excretory hole;
  • intestines;
  • genital opening;
  • uterus;
  • ovaries;
  • anus.
Internal structure of pinworms
Internal structure of pinworms

What pinworm eggs and larvae look like

Pinworm eggs are oval in shape with a colorless shell. One side of the egg is slightly convex, the other is slightly flattened. Dimensions - about 50 microns.

After entering the intestines, the protective shell of the eggs dissolves, and the larva is released. They begin to spread throughout the intestines.

After two weeks, the larvae grow to mature individuals, active reproduction takes place. Larvae, like eggs, differ in microscopic size, so they cannot be seen without a microscope.

Pinworm eggs
Pinworm eggs

What pinworms look like in feces

Since parasites are cleared from the intestines during bowel movements, they may be present in the stool. Living parasites have a somewhat transparent body. The fertilized female completely fills her body with eggs, which is why she becomes white, grayish in color. Males die after mating, and females die after laying eggs.

Usually dead or severely weakened worms are excreted in the feces, they will be inactive or not moving at all, so it is extremely difficult to see them in the feces.

You can determine the presence of pinworms in the feces by several signs:

  • pinworms grow up to 1.5 cm;
  • outwardly similar to a spindle, with a pointed or rounded end;
  • the color of the parasite is white, grayish;
  • they will look like thin white threads.

Pinworms almost always move. They leave the body in whole or in pieces, so small white fragments may be present in the feces.

Parasites are not constantly removed from the intestines, so not every trip to the toilet will be accompanied by the presence of worms in the feces. At the same time, only adults emerge during defecation, the larvae never leave the intestines, they always develop inside the body.

Pinworms in feces
Pinworms in feces

Pinworms on the bottom of a child and an adult

After fertilization, females need to lay eggs. To do this, she crawls out of the intestines and lays eggs around the anus, in the perineum, inside the folds in the skin. This usually occurs at night when the intestines are relaxed.

Infection occurs by combing the masonry. This is how the eggs fall on the linen, hands, under the nails of a person. Then they apply to household items, dishes. Dust spread throughout the house. Dirty hands are an excellent carrier for pinworms.

After entering the intestines, the larvae need about two weeks to develop to a sexually mature individual. Pinworms in the anus are irritating. This significantly impairs the quality of sleep, and regular scratching causes redness, swelling, and pain.

In addition to itching, infection can be accompanied by:

  • convulsions;
  • headaches;
  • upset stool;
  • blood, mucous impurities appear in the feces;
  • pain and bloating;
  • possible nausea with vomiting;
  • since worms poison the body with the products of their vital activity, allergies develop;
  • the ingestion of eggs on the genitals provokes inflammation.

Pinworms are a common type of helminth that occurs in most infestations. Infection is accompanied by negative symptoms, ignoring which leads to serious consequences.

Enterobiasis is easy to treat, especially with a timely visit to a doctor. Self-medication can significantly aggravate the problem, negatively affect further therapy and the healing process.

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