November at孟州Henan broiler market, have taken place in a completely different with previous respiratory disease, and in a serious condition, the spread of fast, local formation of large-scale pandemic. Go at people more concerned about the lung-type E. coli disease and mild type of influenza, they appear after repeated drug treatment is unsatisfactory and there exacerbations, increase in mortality. More than one month, after many clinical drug trials, summed up the success of a set of control measures, and initial diagnosis of the epidemic are the major cause of infectious laryngotracheitis.
The disease mainly occurred in the subsequent 20-day-old broiler complex with myotonic respiratory symptoms mainly after onset dissemination speed, 2 ~ 3 can be spread to the entire group, and a decline in feed intake, and constantly emerging打蔫,伸颈mouth breathing chickens, and mortality with increasing duration of the extension, a daily average of 1000 chickens died around 20 ~ 30, the mid-and late secondary infection prone diseases such as Newcastle disease and Escherichia coli, thereby increasing the patient's condition to increase the difficulty of clinical treatment .
From the autopsy, the incidence of early symptoms are not obvious, the general type of E. coli in accordance with the lung disease or mild respiratory disease caused by influenza ideas to consider.
After nearly a month of the disease many clinical autopsy, autopsy found that symptoms of the disease mainly manifested in the larynx and trachea, the larynx, trachea severe hyperemia, hemorrhage, the same as the red cloth, using scissors to the blood samples were scraped off the mucus, and some chickens there will be blood bronchial Department of plug material. In the latter half of the disease and Newcastle disease or easily Colibacillosis mixed infections, intestinal lymphoid autopsy will consider bubble swelling, or congestive punctate bleeding symptoms and pathological changes of colibacillosis.
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