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The disease is caused by a nematode parasitizing in the small intestines of the intestines of chickens, turkeys, guinea fowl, sometimes geese and ducks. The causative agent of ascariasis is a fairly large parasite of a yellowish-white color. It has a spindle-shaped body, the length of which is 3-12 cm. Their eggs are oval in shape, 0.08 mm long and 0.05 mm wide. The development of roundworm occurs without the participation of an intermediate host. A fertilized female lays eggs in the small intestine, which from there enter the external environment. Freshly isolated eggs for the bird are not contagious. The invasive properties of the egg acquire after the formation of the larva. For degeneration, the egg needs appropriate conditions - temperature (13-40 °) and humid conditions. At low temperatures, eggs do not develop, but remain viable, direct sunlight is detrimental to them.
The bird becomes infected through the digestive tract, in the internal organs of which the eggs are destroyed and the released larvae penetrate into the walls of the small intestine, where they develop for about three weeks. Then they again enter the intestinal lumen, in which they develop to a sexually mature form. The development cycle in the body of chickens lasts 35-58 days, in monthly chickens - 30-35 days. Ascaris live in the body of birds for 8-14 months.
Ascaridosis is widespread. Infection of chickens with roundworms depends on the method of growing young animals and the content of chickens. Infection is limited to the separate keeping of chickens and hens. With their joint content, both are infected. The spread of the disease contributes to the outdoor content of the bird. Cell rearing of young animals and the maintenance of adult poultry in batteries greatly limit the incidence of the herd.
Clinical signs. Depend on the degree of infection and the nature of feeding. In an adult bird, the disease proceeds without characteristic signs. In infected young animals, the signs are most characteristic: blanching of the mucous membranes of the crest, limbs, growth retardation, loss of appetite, ruffled plumage.
Blood diarrhea is possible. In sick chickens, egg production is markedly reduced. The bird weakens, loses weight with a good appetite.

Pathological changes. At autopsy, birds find a large number of worms in the intestines. Often they form whole tangles, clogging the intestinal lumen. In the initial period of the disease, at the site of localization of Ascaris larvae, the intestinal mucosa is swollen and penetrated by a multitude of point hemorrhages.
The diagnosis is made on the basis of clinical signs, detection of eggs in the litter and post-mortem data.
Control measures and prevention. To combat roundworms, drugs such as piperazine and phenothiosine are used.
With ascariasis, piperazine is administered with feed or water to chickens of 2-3 months of age at a dose of 0.3-0.5 g, for adult birds - 1 g per head. After a day, the treatment is repeated. When giving the drug with drinking water, it is pre-dissolved in warm water at the rate of 5 g per 1 liter of water, taking into account the daily water requirement of the chickens.
Phenothiosin is prescribed in a mixture with food: chickens from 15 days to 2 months of age and adult hens 2-2.2 g per 1 kg of bird weight. Moreover, on the first day they give 2/3 of the therapeutic dose, on the second — 1/3. Preparations with feed to the bird are given in the morning feeding, and the feed mass is reduced for complete eatability.
The preparation tetrachorethylene in a dose of 1-2 ml and butyldene chloride in a dose of 3-5 ml per chicken is highly effective. Raw pumpkin and its seeds have anthelmintic properties during its long-term feeding.
Among the preventive measures, of particular importance is the isolated rearing of young stocks from an adult herd, the systematic cleaning of the house and the yard, followed by treatment with boiling water or a 5% solution of xylonaphth-5, orthochlorophenol.

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  1. Ascariasis
    The causative agent is roundworm, parasitic in the adult stage in the small intestine. Ascaris life expectancy is about a year. At the stage of migration (the first 6-8 weeks after infection), Ascaris larvae exert a mechanical and sensitizing effect, causing eosinophilic infiltrates in the tissues of various organs and causing hemorrhages. In the intestinal phase (8 weeks after the lesion), adult roundworms
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  4. Epizootological data
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