First of all, we all know that under normal circumstances, the chicken crown and hair of the chicken are bright red, and the mental state is particularly good, but why in this season, the chickens love to appear the crown of the chicken white, there are needle-like bleeding points, then let's talk in detail about the causes and treatment methods of this disease.
The cockscomb is whitish and has pinprick-like bleeding spots
Chicken white crown disease, also known as chicken leukocytosis, is a protozoal disease caused by the parasitism of chicken leukocytes and red blood cells in chickens.
Chicken white crown disease is caused by blood-sucking mosquitoes, grasshoppers and grasshoppers, which spread the pathogen to healthy chickens after biting sick chickens, resulting in infection in chicken populations. Therefore, some places also call "white crown disease" "mosquito disease".
White crown disease has a distinct seasonality, occurring mainly in the north from July to September and mainly in the south from April to October, and the mortality rate is highest in chickens aged 30-90 days.
Clinical symptoms of white crown disease in chickens
The most obvious feature of all sick chickens is anemia and a pale crown. The symptoms of the onset chicks are obvious, the body temperature is elevated, the appetite is weak, the spirit is depressed, the salivation, the discharge of yellow-white or yellow-green thin feces, the feathers are loose, the gait is unstable, the breathing is difficult, the hemoptysis is hemoptysis, etc., the growth and development are stunted, and the mortality rate is high. After about two weeks of infection in middle chickens or adult chickens, the meat is pale, the appetite becomes worse or abandoned, the spirit becomes worse, the legs are paralyzed and weak, the yellow and green feces are pulled, and in severe cases, the mouth bleeds or the intra-abdominal bleeding suddenly dies. Laying hens generally produce about 10% of eggs, and thin-shelled eggs and soft-shelled eggs increase. Most sick chickens convulse and spasm before death, and individual chickens suffer from nose and mouth bleeding before and after death. Later individual chickens appear paralyzed.
After dissecting the sick and dead chicken, if the following symptoms are found, the chicken can be diagnosed with white crown disease:
(1) After autopsy, it was found that the blood of the sick chicken was thin, the blood clotting was poor, the muscles of the whole body were pale, and the muscles were extensively bleeding.
(2) The more typical symptom is that there are small gray-white nodules on the heart, mesentery, thymus and fallopian tube membranes.
(3) There are blood clots in the mouth, and there are obvious bleeding spots or blood spots in the chest muscles and leg muscles.
(4) Sometimes the spleen of the sick chicken can be seen to be enlarged, and there are gray and white necrosis spots on the spleen.
(5) There are ruptured follicles in the abdominal cavity of laying hens.
How to prevent it
(1) Do a good job in the environmental hygiene of the chicken coop, remove the surrounding weeds, leave no stagnant water area, and the drinking fountain can be cleaned frequently.
(2) In addition, some wormwood and mint can also be planted appropriately around the chicken coop to repel mosquitoes.
(3) The elimination of blood-sucking insects, grasshoppers and grasshoppers is the main link in the prevention of this disease, spraying the chicken coop and the surrounding environment with 0.2% pyrethroid kerosene solution, spraying every 6-7 days.
(4) Sulfamethicazine can also be used, according to 0.0025%-0.0075% mixed feeding or drinking water.
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