Several common livestock and poultry influenza

Chicken influenza: an acute hemorrhagic infectious disease caused by type An influenza virus of Orthomyxoviridae characterized by dyspnea and decreased egg production. It is easy to occur in four seasons, but it often occurs in cold seasons. Contact infection through the digestive tract and respiratory tract. At present, the popular virus type in China is mild type. 1. Clinical symptoms: (1) increased body temperature, mental depression, loose feathers and reduced diet in diseased chickens; (2) cough, dyspnea, cephalofacial edema, purple crown and horny scale bleeding in hindlimb extension; (3) severe and extensive bleeding in serosa, mucous membrane and parenchyma. (4) the laying population of laying hens decreased sharply, and the number of soft eggs, thin preserved eggs and faded eggs increased. (5) there are white sticky or egg white-like secretions in the fallopian tube. 2. Porcine influenza: it is an acute and highly contagious infectious disease of pigs, characterized by sudden onset and rapid spread of the whole herd, and the main symptom is upper respiratory tract infection. it usually occurs in winter and spring and when the climate changes suddenly, and the disease is often secondary to Haemophilus parasuis in pigs. The incubation period of pig clinical symptoms is very short, from a few hours to a few days, with an average of 4 days at the time of natural onset. The body temperature of diseased pigs increased to 40 ℃ ~ 41.5 ℃, depressed spirit, loss of appetite or lack of food, muscle pain, reluctance to stand, viscous fluid outflow from eyes and nose, conjunctival congestion, dyspnea, wheezing, coughing, abdominal breathing, dog sitting posture, asthma sound of diseased pigs could be heard at night, joint pain of individual diseased pigs, especially in pigs with good fat condition. Autopsy showed that the larynx, trachea and bronchi were filled with mucus containing bubbles, mucous membrane hyperemia, swelling, sometimes mixed with blood, pulmonary interstitial enlargement, lymph node enlargement, congestion, splenomegaly, catarrhal hemorrhagic inflammation in gastrointestinal mucosa, accumulation of cellulosic fluid in chest, abdominal cavity and pericardium. Equine Influenza (Myxovirus inflnenga A-cqui) is an acute epidemic venereal disease caused by equine influenza myxovirus, characterized by sudden outbreaks, frequent dry coughing, fever, clear nose, high morbidity and low mortality. In the past, the so-called equine "influenza" recorded in the literature actually includes a variety of horse diseases that have not been clearly distinguished, so the relevant narration obscures the history of real equine influenza. It is now known that the so-called "equine flu" in the past was not only caused by the real influenza virus, but also rhinopneumonia and equine viral arteritis caused by herpesvirus, and there may also be some other causes to be discovered. 4. Meat influenza: this disease is referred to as influenza. It is an acute, febrile and systemic infectious disease of beef cattle. The disease is characterized by sudden fever, severe catarrhal inflammation in the digestive tract and respiratory tract, and often complicated with arthritis of the extremities. There is subcutaneous emphysema. The pathogen is bovine influenza virus, which exists in the blood, lung and respiratory secretions of diseased boves. it has low resistance to the external environment and can be killed in 10 minutes at 56 degrees Celsius. Ultraviolet radiation, acid and alkali can all inactivate. The disease spreads rapidly, and the incidence rate can reach 40% to 60%. It can be spread mainly through respiratory tract infections, blood-sucking insect bites, appliances, people and other animals. It often occurs in late autumn and early spring when it is wet and rainy and the climate changes suddenly. Beef cattle at the age of 3 to 5 years old are the most prone to the disease, which can be induced by poor feeding and management, improper service and so on. The course of the disease is short, but it is generally good. According to observation for many years, the disease has a pandemic every 3-5 years. The symptom incubation period is 2-4 days, the disease occurs suddenly, and the epidemic is very fast. When the disease occurs, the hair is reversed and the skin temperature is irregular. Local and even systemic muscle tremor, the head and neck is the most significant. Hindlimb joint pain, so paralysis, lying on the ground can not afford. The diagnosis is mainly based on epidemic characteristics and clinical symptoms, but it should be distinguished from the common cold (cold). The common cold is not epidemic, the body temperature is slightly higher or normal, and there are no obvious systemic symptoms. (.)-- the most terrible thing is H5N1, which has caused a large number of poultry infections, H1N1, and caused the current worldwide epidemic. If there is a classification, how to prevent and cure it? can the landlord introduce it more clearly?