Recently, some of the farmer's free-range chickens in Tangxian county developed diseases that mainly consisted of pox spots, pox rashes, and discharge of yellow and white stools. After a comprehensive examination by the author, they were diagnosed as mixed chickenpox and E. coli infections. The specific circumstances are described below. For farmers reference.
1. Incidence. Hwang had more than 500 170-day-old fired chickens. At the beginning, some chickens appeared nose-blowing, sneezing, tearing, and lower eyelid swelling. Later in the day, diarrhea and “breathing†breath sounds occurred and chickens began to die. Hwang thought it was a chronic respiratory disease caused by environmental mutations. After drinking tylosin for 5 days, there was no obvious improvement in the chickens. As more and more chickens became ill, I came to see my doctor.
2. Clinical symptoms. The diseased chickens were apathetic, with their heads closed; the feed intake and water consumption of the chickens decreased significantly; about 20% of the diseased chickens had symptoms such as mouth opening, neck and yellowish white excrement, and obvious pox spots at the corners of the mouth and nostrils. Some diseased chickens showed watery secretions from their eyes and nostrils, and yellow-white nodules appeared on the conjunctiva of the eye. Individual severe diseased chickens could squeeze out the cheese from the eyes. Difficulty in the diseased chicken, oral mucosa, throat, etc., there are obvious yellow pox blocked throat.
3. Pathological changes. Death of chicken corneal conjunctiva, oral mucosa, throat, upper tracheal mucosa there is a pseudomembranous cellulosic necrosis; pseudo-membrane peeling, visible red ulceration surface. Most diseased chickens had swollen eyes in the lower eyelid, and the air sac was severely turbid with severe pericarditis and pericarditis. The gut of some chickens became thin due to diarrhea. According to the above, combined with laboratory tests, diagnosed as a mixed infection of E. coli and fowlpox.
4. Treatment. 1 Add amikacin soluble powder to drinking water and drink for 4 consecutive days. 2 Stir in the diet and mix it with Qingxiebaidu Powder (Daqingye, Banlangen, Honghua, Huangqi, Angelica, Coptis, Bupleurum, etc.) and use it continuously for 7 days. At the same time, add a sufficient dose of cod liver oil and multivitamins to the feed, paying particular attention to the addition of sodium selenite and vitamin C to improve the immunity of the flock. 3 Insulate the diseased chickens with dyspnea, remove the acne and cellulose exudate in the throat cavity with forceps, and then apply the iodine glycerin on the wound surface and put it in a warmer environment for feeding alone. 4 Use iodine-containing, chlorine-containing disinfectant to alternately disinfect the house, in particular, the water tank and trough should be cleaned and disinfected, and the drinking water disinfectant can be used for cleaning. After the above treatment, the condition is controlled and the number of dead chickens is reduced. One week later, the flock returned to normal and feed intake increased gradually.
5. Diagnosis and treatment experience. 1 Chickenpox is mostly caused by infection of the skin with poxviruses. Due to damage to the surface of the skin, E. coli can easily invade and cause mixed infections. 2 chickenpox in accordance with normal procedures for epidemic prevention, chickens rarely infected. In winter and spring, chickenpox is usually immunized at 60 days of age. 3 The scientific method of inoculation is to irritate the skin under the skin: inoculate needles on the inside of the wings without blood vessels to pierce the species, the strength is to see the blood without bleeding, the principle is "kind of left but not right", check the effect after one week. If the vaccination is successful, a wheat-sized pneumothorax appears at the site of inoculation, otherwise it will be immediately re-filled.
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