Roundworms: Size, Color, Life Cycle, Nature Of Movements And Shape Of Eggs (photo And Video)

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Roundworms: Size, Color, Life Cycle, Nature Of Movements And Shape Of Eggs (photo And Video)
Roundworms: Size, Color, Life Cycle, Nature Of Movements And Shape Of Eggs (photo And Video)

Video: Roundworms: Size, Color, Life Cycle, Nature Of Movements And Shape Of Eggs (photo And Video)

Отличия серверных жестких дисков от десктопных
Video: Diagnostic Features of Intestinal Nematodes 2023, February

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  • Life cycle
  • Symptoms and signs of ascaris
  • Treatment and prevention
  • You can defeat parasites!

Ascariasis is one of the most common types of parasitic diseases in the world. This is due to the high degree of susceptibility to the disease, because even after the cure, immunity to it is not developed.

Ascariasis is caused by roundworms - worms of the genus Ascaris lumbricoides, belonging to the family of roundworms (nematodes), parasitizing mainly in the intestines.

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 >>>

Their smooth spindle-shaped body has a diameter of 2 to 6 mm, color - from pale pink to reddish (see photo).

Ascaris: sizes
Ascaris: sizes

A feature of this worm is the presence of a cuticle - a characteristic multilayer shell that protects roundworms from the adverse effects of enzymes and toxins in the intestines.

Unlike other worms that have special hooks for attaching to the intestinal walls, roundworms have to constantly move so as not to leave the human body along with feces (only roundworm eggs and dead worms are excreted this way).

The nature of movements is always directed in the direction opposite to the movement of food and exit from the body.

As a rule, during infection in the human body, roundworms of both sexes develop.

Ascaris themselves, if this helminthiasis is not treated, safely survive to "old age" and die at the age of 1, maximum 2 years.

Life cycle

The life cycle of the roundworm is closed, and it begins in the human intestine, where the female produces eggs.

Fertilized ascaris eggs enter the external environment along with feces and, in the presence of favorable conditions, turn into a larva.

For their maturation, the optimum temperature range is from +12 to +37 ° C and moist soil rich in oxygen.

The size of the roundworm eggs can only be seen under a microscope. Their sizes are hundredths of a millimeter: from 0.05 to 0.07. Despite their microscopic size, they have an enviable vitality.

Even at temperatures below -20 ° C, they can survive for up to 24 days and die only at -30 ° C. Temperatures above + 50 ° C are also destructive for them, and the boiling point causes instant death.

When eggs enter the intestines, they break and larvae appear. Their small size allows them to enter the bloodstream through the intestinal mucosa, and from there they are carried throughout the body and localized mainly in the liver and lungs, where their development continues. This so-called early (migratory) stage takes about 2-3 weeks.

The small size allows the larvae to move through the capillaries until they again enter the oral cavity, and from there again into the intestine, where they develop to adults, since the ascaris larvae, the size of which has increased, are no longer able to penetrate the mucous membrane.

The whole process takes 2 months, after which roundworm eggs appear in the feces, and the life cycle begins anew.

Ascaris life cycle
Ascaris life cycle

Symptoms and signs of ascaris

Symptoms depend on the location of the parasites. As a rule, at the early (larval) stage of the roundworm, there are complaints associated with the respiratory organs, and at the late, intestinal stage, adult roundworms localized in the gastrointestinal tract cause complaints about its work.

In addition, the allergic component comes into play, since human roundworm releases waste products that are toxic to humans.

In adults, ascariasis in the early stages is most often manifested by the following symptoms:

  • weakness, lethargy, fatigue, decreased appetite and performance;
  • the appearance of a cough, dry or wet, with mucous sputum;
  • discomfort in the abdomen;
  • low-grade fever, sometimes with chills;
  • the occurrence of pain in muscles and joints;
  • allergic phenomena (the appearance of itching and rashes such as urticaria).

At a later stage, these symptoms are added:

  • nausea and vomiting;
  • bloating (flatulence) accompanied by rumbling;
  • the occurrence of cramping or dull pain in the upper abdomen and near the navel;
  • diarrhea alternating with constipation;
  • losing weight;
  • neurological phenomena (insomnia, headaches, sometimes dizziness).

In children, most often suffering from ascariasis at the age of 3 to 10 years, the following symptoms may be added to this:

  • lag in weight gain and physical development;
  • vitamin deficiency due to the consumption of roundworms of a significant part of the nutrients in the incoming food;
  • more severe allergic reaction;
  • chest pains, pus in sputum;
  • often the occurrence of bacterial complications (bronchitis, pneumonia, etc.).

Take a test for ascaris

Symptoms Answer Itching in the anal area Yes Not Intestinal dysbiosis Yes Not General weakness Yes Not Dry cough Yes Not The appearance of allergic reactions Yes Not Weight loss Yes Not Headaches Yes Not Dizziness Yes Not Increased irritability Yes Not Swelling of the face and eyelids Yes Not

Treatment and prevention

It should be noted right away that the whole family must undergo treatment. Before proceeding with the treatment of ascariasis, it is necessary, along with the study of feces, to carry out hematological, immunological and X-ray studies.

Vegetative resonance testing is an effective diagnostic method for identifying the type of helminth infection, the area of ​​localization of ascaris and the period of development of the disease.

First of all, you need to prepare the body. For this, along with medicines (allochol, enterosgel), traditional medicine (pumpkin oil, flax oil) are used.

To destroy ascaris, drugs such as decaris, vormil, Evalar triad, pyrantel, etc. are used, the dosage of which is determined by the doctor.


And, finally, the completion of treatment will be the intake of drugs to eliminate the consequences of helminthic invasion: relieve inflammation, heal damaged walls of blood vessels and capillaries. To strengthen the immune system, immunomodulators are also prescribed.

For the prevention of ascariasis it is necessary:

  • strictly adhere to hygiene requirements (be sure to wash your hands after using the toilet, before eating, after city transport, and for children after walking and playing in the fresh air);
  • wash vegetables and fruits thoroughly;
  • do not leave food open, as roundworms are carried by flies and cockroaches.

Pets, or rather fleas that parasitize them, are also carriers of ascaris eggs and larvae, therefore, anthelmintic therapy is recommended for cats and dogs.

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