The clinical symptoms and pathological changes of swine flu. Find out which pigs have had it in recent years.

Swine influenza English: swine influenza abbreviation: swine flu [edit this paragraph] A brief introduction to swine influenza, the full name of swine influenza, is an acute, infectious respiratory disease of pigs. It is characterized by sudden onset, cough, dyspnea, fever and rapid recovery. Swine flu is a respiratory disease caused by viruses in pigs. Swine flu is caused by influenza A virus (influenza A virus) and usually breaks out among pigs. It is highly contagious but usually does not cause death. Autumn and winter is a high incidence period, but it can be spread throughout the year. Swine influenza is mostly identified as influenza C virus (influenza C virus), or one of the subspecies of influenza A virus. The virus can cause influenza outbreaks in pigs. Generally speaking, humans are rarely infected with swine flu virus. There are many different types of swine influenza, including H1N1, H1N2, H3N1, H3N2 and H2N3 subtypes of influenza A viruses that can cause swine influenza infection. Unlike bird flu, swine flu can be transmitted from person to person. There have been cases of human infection of swine flu in the past, but there have been no cases of human-to-human transmission. In mid-April 2009, Mexico announced a human-to-human case of swine flu caused by H1N1 swine influenza virus, and genetic analysis revealed that pigs, chickens and genes from Asian, European and American races were found in the gene. Symptoms of human infection with swine flu: patients with swine flu usually have high fever above 39 degrees Celsius, severe headache, muscle pain, cough, stuffy nose, red eye and other symptoms. [edited this paragraph] symptoms, prevention and diagnosis of swine influenza epidemic characteristics of pigs of all ages, genders and breeds are susceptible to the virus. The epidemic of the disease has obvious seasonality, and the weather is changeable in late autumn, early spring and cold winter. The disease spreads rapidly and is often endemic or pandemic. The incidence of the disease is high and the mortality rate is low (4% Murray 10%). Sick pigs and infected pigs were the source of infection of swine influenza, and pigs were infected for 6 to 8 weeks after recovery from the disease. Clinical features the incubation period of the disease is very short, from a few hours to several days, with an average of 4 days when the disease occurs naturally. At the initial stage of the disease, the body temperature of diseased pigs suddenly increased by 40.3 ℃ ~ 41.5 ℃, anorexia or loss of appetite, extreme weakness and even collapse, often lying on the ground. Shortness of breath, abdominal breathing, paroxysmal cough. Mucus flows from the eyes and nose, and nasal secretions are sometimes bloody. Sick pigs lie together, difficult to move, touch muscle stiffness, pain, diaphragm spasm, respiratory setbacks, commonly known as hiccups. If there is a secondary infection, the disease is aggravated, resulting in fibrinous hemorrhagic pneumonia or enteritis. Sows are infected during pregnancy, and piglets are seriously ill 2-5 days after delivery, and some die during lactation and before and after weaning. Pathological changes the pathological changes of porcine influenza are mainly in respiratory organs. The mucous membrane of nose, pharynx, larynx, trachea and bronchus is congested and swollen, the surface is covered with sticky liquid, and the bronchioles and bronchioles are filled with foamy exudate. The chest and pericardium accumulate a large amount of serous mixed with cellulose. The pathological changes of the lungs often occur in the back and base of the apical lobe, cardiac lobe, middle lobe and diaphragmatic lobe, with a clear boundary with the surrounding tissue, the color from red to purple, collapse, solid, toughness like leather, splenomegaly. Cervical lymph nodes, mediastinal lymph nodes, bronchial lymph nodes are enlarged and juicy. Because swine influenza does not always appear in a typical form and is very similar to other respiratory diseases, the clinical diagnosis can only be hypothetical. In autumn or early winter, respiratory diseases in pigs can be suspected of swine influenza. The outbreak of upper respiratory syndrome, including conjunctivitis, sneezing and coughing and low mortality, can distinguish porcine influenza from other upper respiratory diseases of pigs. in differential diagnosis, attention should be paid to the difference between porcine asthma and this disease. the two are the most likely to be confused. Prevention and treatment measures there is no effective vaccine and special treatment for the disease. it is important to take good care of the pig house and keep it clean, dry, warm and free from thieves. Provide an adequate supply of clean drinking water and limit the supply of feed in the first few days of recovery. Do not harass or move sick pigs during the disease in order to reduce stress death. Porcine influenza is characterized by sudden onset, rapid spread of the whole population, the main symptoms are upper respiratory tract infection, generally occurred in winter and spring and sudden climate changes, the disease is also often secondary to Haemophilus parasuis. Clinical symptoms and pathological changes the incidence of the disease is high, the incubation period is 2-7 days, and the course of the disease is about 1 week. In the early stage of the disease, the sick pig suddenly has a fever, lethargy, loss of appetite or abstinence, often lying together, unwilling to move, dyspnea, intense cough and mucus from the eyes and nose. If the disease is not treated in time, it is easy to be complicated with bronchitis, pneumonia and pleurisy, which increases the fatality rate of pigs. 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. Epidemic characteristics pigs of all ages, genders and breeds are susceptible to this virus. The epidemic of the disease has obvious seasonality, and the weather is changeable in late autumn, early spring and cold winter. The disease spreads rapidly and is often endemic or pandemic. The incidence of the disease is high and the mortality rate is low (4% to 10%). Sick pigs and infected pigs were the source of infection of swine influenza, and pigs were infected for 6 to 8 weeks after recovery from the disease. Clinical features the incubation period of the disease is very short, from a few hours to several days, with an average of 4 days when the disease occurs naturally. At the initial stage of the disease, the body temperature of diseased pigs suddenly rose to 40.3 to 41.5 ℃, anorexia or loss of appetite, extreme weakness and even collapse, often lying on the ground. Shortness of breath, abdominal breathing, paroxysmal cough. Mucus flows from the eyes and nose, and nasal secretions are sometimes bloody. Sick pigs lie together, difficult to move, touch muscle stiffness, pain, diaphragm spasm, respiratory setbacks, commonly known as hiccups. If there is a secondary infection, the disease is aggravated, resulting in fibrinous hemorrhagic pneumonia or enteritis. Sows are infected during pregnancy, and piglets are seriously ill 2-5 days after delivery, and some die during lactation and before and after weaning. Pathological changes the pathological changes of swine flu are mainly in respiratory organs. The mucous membrane of nose, pharynx, larynx, trachea and bronchus is congested and swollen, the surface is covered with sticky liquid, and the bronchioles and bronchioles are filled with foamy exudate. The chest and pericardium accumulate a large amount of serous mixed with cellulose. Lung lesions often occur in the apical lobe, cardiac lobe, interlobar lobe, the back and base of the diaphragm lobe, with a clear boundary with the surrounding tissue, the color from red to purple, collapse, solid, toughness like leather, splenomegaly. Cervical lymph nodes, mediastinal lymph nodes, bronchial lymph nodes are enlarged and juicy. It's so detailed. Collect-- thank you, collect.