Licensed books on medicine
<< Previous || Next >> |
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.
| << Previous || Next >> |
| = Skip to textbook content = |
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
- Parasitic diseases in children (enterobiosis, ascariasis)
Of all the registered parasitoses in people in the republic, enterobiosis, ascariasis are the most significant. Enterobiosis - helminthiasis, challenge. round pinworm. Etiology and epidemiology. Pinworm - a small white nematode parasitic in the human intestines. Helminth life expectancy is from 1 to 3 months; at the end of life, the female helminth creeps out and postpones
The causative agent is roundworm. The transmission path is feck-op. Anthroponosis, geohelmintosis - for the maturation of eggs, their stay in the soil at 24 ° C is necessary. Pathogenesis. Eggs enter the intestine, larvae are released from them, which enter the portal vein through the wall of the intestine, then into the liver (by the 5th day). By the 10th day - hematogenously into the lungs, where they molt 2 times, break through the wall of the alveoli and through the respiratory tract
- Epizootological data
Cattle: 1. fasciosis - infection 30%; 2. dictiocauliasis - 25%; 3. telaziosis - 100%; MRS: 1. fasciosis - 20%; 2. fleas - 50% 3. lice - 40% 4. ticks - 10% Pigs: 1. esophagostomiasis - 30% 2. metastrongylosis - 20% 3. ascariasis - 60% Horses: 1. oxyurosis - 20% 2. ascariasis - 30% 3.strongilatoses -
Helminthiasis is a group of diseases caused by parasitic worms - helminths. More than 250 types of helminths have been described in humans, of which in Russia representatives of the class of roundworms are most important: causative agents of ascariasis, hookworm infections, trichinosis, enterobiasis; trichocephalosis; class of tapeworms: teniosis, diphyllobothriasis, echinococcosis; class of flukes:
Ascaridosis - caused by roundworm parasitizing in the small intestine of a person. These are round worms with pointed ends. The body length of the female is 25–40 cm, the male is 15–20 cm. The only source of causative agents of ascariasis is a sick person. A roundworm female lays up to 200-240 thousand immature eggs per day (their size is 0.06 x 0.04 mm), which enter the environment with human feces. Eggs
- Crib. Infectious diseases, 2010
Typhoid fever. Paratyphoid A and B. cholera. Amoebiasis. Yersiniosis. Ascaridosis. Trichinosis. Typhus fever, Brill-Zinsser batch. Echinococcosis. Enterobiosis. Q fever. Lime borreliosis. Leptospirosis. Tularemia. Anthrax. Meningococcal infection. Plague. Tetanus. Rabies. Ornithosis. Legionellosis. Erysipelas. Influenza. Food.
Ascaridosis Ascaridosis is a human helminthiasis caused by round helminth Ascaris lumbricoides. It is characterized by an allergic syndrome in the early phase of the disease and impaired gastrointestinal function in the late phase. Choice of antimicrobial agents. Drugs of choice: pyrantel, 10 mg / kg once. Alternative drugs: levamisole, mebendazole, albendazole. ANKILOSTOMIDOSIS Ankylostomidosis -
It is characterized by a narrow spectrum of activity. Acts only on some round helminths. It is one of the drugs of choice for the treatment of ascariasis. The mechanism of action The anthelmintic effect is due to a violation of the bio-energy of helminths and a paralyzing effect. The spectrum of activity of roundworm, pinworms and some other nematodes. Pharmacokinetics is well and rapidly absorbed in
- Dispersion and circulation of parasitosis pathogens in the environment
Helminth eggs and larvae The main "suppliers" (sources) of helminth eggs to the environment are sick people, domestic and wild animals, and birds. The power of the source of invasion, and therefore the amount of invasive material released into the environment, depends on the type of invasion, fecundity, number and life of helminths. It has been established that a female roundworm excretes about
Urbanization is the process of concentration of industry and population in large cities. The population from the private sector moves to comfortable apartments in multi-storey buildings (only in 1984, 113.7 million m2 of living space was commissioned in our country, which improved housing conditions for more than 10 million people). This eliminates personal plots, the soil of which is often
Roundworms. Morphology and anatomy. Some features of the nutrition and metabolism of nematodes. Reproduction and life cycles. Parasitic roundworms are causative agents of many dangerous diseases (nematodes) in humans and domestic animals. The economic damage caused by nematodes in agriculture is very large. They pose a serious threat to human health. Nematodoses. Ascariasis
- Differential diagnosis
The above tissue helminthiases must be differentiated from each other, and in some cases (toxocariasis, trichinosis) - with the acute phase of other helminthiases (ascariasis, schistosomiasis, opisthorchiasis) and diseases, including allergic nature, accompanied by high eosinophilia. Toxocariasis, depending on the prevailing organ changes, differentiates with bronchial asthma,
- IRIT AND IRID CYCLES
Iritis is inflammation of the iris, and iridocyclitis is inflammation of the iris and ciliary body. As a rule, iridocyclitis (uveitis) is observed in cats. The disease occurs as a result of injuries, viral, bacterial or toxoplasma infections, systemic fungal diseases, ascariasis, severe intoxication or metabolic disorders. In severe cases, iridocyclitis may
- DISCIPLINE TEST
1. What diseases can be transmitted to humans with meat from sick animals? a) brucellosis; c) tuberculosis; e) hepatitis; h) tularemia; i) cholera. b) syphilis; d) anthrax; g) foot and mouth disease; j) plague; 2. Which animal meat can cause trichinosis infection? a) cattle; d) a ram; b) pigs;