What are the clinical manifestations of swine lung disease? What are the symptoms of swine lung dise

A: According to the length of the disease and clinical manifestations, it is divided into the most acute, acute and chronic types. The most acute type.

He did not have any symptoms, became suddenly ill, and died quickly. In the course of the disease, the elderly showed a body temperature of 41 42, loss of appetite, dyspnea, rapid heartbeat, cyanosis of the visible mucosa, and ** purplish erythema. The throat and neck are hot, red, swollen, and hard, and in severe cases, extend to the base of the ears and chest.

Sick pigs have extreme difficulty breathing, often sitting in a canine posture, stretching their heads and necks, sometimes making a wheezing sound, and white foam flows out of their mouths and noses, sometimes with blood. Once severe breathing difficulties occur, the condition often deteriorates rapidly and death occurs quickly. The mortality rate is often as high as 100%, and it is rare to see natural **.

Acute type. This type is the most common. The body temperature of the sick pig is 40 41, and the initial stage is a crampic dry cough, dyspnea, foaming at the mouth and nose, sometimes mixed with blood, and then becomes a wet cough.

As the disease progresses, breathing becomes more difficult, often in a canine sitting position, and palpation of the chest is painful. Lack of energy, loss of appetite or disuse, ** erythema, later weakness, bedridden, mostly due to suffocation. The course of the disease is 5-8 days, and the immortal becomes chronic.

Chronic. The main manifestations are pneumonia and chronic gastroenteritis. Occasionally, there is a persistent cough and dyspnea, and a little moving or purulent nasal discharge.

Swollen joints, often diarrhea, loss of appetite, malnutrition, crusty eczema, growth arrest, extreme emaciation, the course of the disease is more than 2 weeks, and most of them die.

The incubation period of the disease is 1 to 5 days, and the clinical symptoms can be divided into three types: the most acute, acute and chronic.

1) The most acute type.

Onset is sudden, sometimes with no symptoms and sudden death. The course of the disease is slightly older, the body temperature reaches 40 42, the breathing is highly difficult, the appetite is lost, the whole body is weak, lying on the ground, the throat is swollen, there is heat pain, the severe case can be extended to the root of the ear and neck, the mouth and nose flow foam, in a dog sitting position. Because the main symptoms are swelling of the throat and difficulty breathing, it is also called "lock throat wind".

2) Acute type.

The main manifestations are acute pleuropneumonia, the body temperature of the sick pig rises, dry cough, nasal fluid and purulent eye feces, dyspnea, constipation at the beginning, diarrhea after the later stage, purple spots in the later stage, the sick pig is emaciated and weak, bedridden, the course of the disease is 5 8 days, and the immortal becomes chronic.

3) Chronic type.

It is more common in the late epidemic stage, and the main manifestations are symptoms of chronic pneumonia or chronic gastroenteritis, persistent cough, dyspnea, loss of appetite, gradual weight loss, and finally diarrhea, and death due to weakness for more than 2 weeks.

The incubation period of swine fever is 1 3 days. The incidence of piglets and maturing piglets is higher than the incidence. Diseased pigs carry bacteria from pig lung disease in various organs of the body, which are excreted through intestinal secretions and excretions.

The bacteria can spread to healthy pigs through breathing and other means, causing infection. The incidence is higher when healthy pigs are weak.

Porcine lung disease is divided into three types: acute, acute and chronic. The most acute death is relatively rapid and can last for 1 to 2 days. The main manifestation is fibrinous pleuropneumonia.

The symptoms of sepsis are not very obvious. At first, the body temperature is high, dry cough, purulent eye feces, constipation, and later purple diarrhea appears. Acute swine lung disease can last up to 4-6 days.

Chronic porcine lung disease can last up to about 2 weeks. The main manifestations are loss of appetite, dyspnea, depression and hyperthermia.

Through epidemiology, clinical symptoms and pathological changes, we can also make a preliminary judgment on swine lung disease and make an accurate diagnosis through laboratory methods. However, it needs to be differentiated from acute throat disease and swine asthma. Fundamentally, the way to prevent pig lung disease is to pay attention to the environment of the pig farm, pay attention to ventilation, clean up pig manure in time, reduce the density of pigs, and thus improve the resistance of pigs.

At the same time, pigs should be vaccinated in a timely manner. Breeding boars must be vaccinated with inactivated vaccine twice a year, and breeding sows should be vaccinated before breeding. Typically, fattening pigs are injected approximately once a month.

Sick and dead pigs should be buried deep or burned with fire to prevent secondary infection with other pigs.

Breeders should often observe the situation of pigs, and if they find abnormalities, they should be isolated immediately, diagnose them in time, understand the situation of pigs, and detect and improve them as soon as possible to prevent large-scale infections and cause heavy losses. In addition, the combination of traditional Chinese and Western medicine has also achieved good results in pig lung disease. Sick pigs can be treated with a combination of traditional Chinese and Western medicine**, pig lung disease is a common infectious disease.

The slightest carelessness will cause huge losses to the farm, but it can also be prevented by the combination of traditional Chinese and Western medicine. In order to understand the mobility characteristics and clinical symptoms of porcine lung disease and elucidate the pathological changes of porcine lung disease, we can make a preliminary judgment on pigs through some simple medical knowledge, and then make an accurate judgment through laboratory methods.

The most common is the acute form, which presents primarily as acute pleuropneumonia. Elevated body temperature, persistent cough and dyspnea, initially dry cough that turns into a wet cough with pain on cough and rales and friction rubs on auscultation. Mucopurulent discharge from the nose, sometimes mixed with blood.

Constipation in the early stage, diarrhea in the later stage, mostly death due to suffocation, the course of the disease is 5 to 8 days, and the one without death becomes chronic.

Symptoms: the most acute type, eat normally at night, die early the next morning, often do not see the symptoms, the course of the disease is slightly longer, the body temperature rises to 41-42, appetite is lost, the whole body is weak, bedridden, dyspnea, dog sitting posture, foam from the mouth and nose, the course of the disease is 1-2 days, and the mortality rate is 100.

Acute type (pleuropneumonia type), body temperature 40-41, spastic dry cough, mucous or purulent sputum discharge, dyspnea, then wet, painful cough, chest pain, dog sitting, dog lying, constipation at first, diarrhea, and congestive hemorrhagic spots can be seen on **. Chronic type, persistent cough, dyspnea, nasal discharge with a small amount of mucus, sometimes joint swelling, emaciation, diarrhea, and death after more than 2 weeks, the case fatality rate is 60-70%.

Porcine lung disease is also known as swine pasteurellosis, commonly known as throat lock madness or swollen neck plague. It is an acute or sporadic and secondary infectious disease caused by specific serotypes of Pasteurella multocida. Acute cases present with symptoms of hemorrhagic sepsis, pharyngitis, and pneumonia.

It occurs in a sporadic manner and is often a secondary to other diseases.

1。Epidemic characteristics: This disease is common in middle and small pigs, with the most occurring in late autumn and early spring and the season of sudden climate change, and the south is prone to occur in the humid, hot and rainy season.

Due to the upper respiratory tract of some pigs, long-distance transportation, improper feeding management, poor sanitation and environmental mutation are important stress factors for the disease. In northern or northern China, most of the secondary swine lung disease is sporadic, and the south is epidemic swine lung disease.

2。Acute cases of clinical symptoms are generally short-lived, and death can occur suddenly. Typical manifestations are acute pharyngitis, high degree of redness and swelling of the neck, heat and hardness, dyspnea, and symptoms of pneumonia; Sporadic or secondary chronic disease pigs, the symptoms are not obvious, and it is easy to be confused with other infectious diseases.

3。The most acute cases of pathological changes are characterized by sepsis changes and acute inflammation of the throat. Acute cases are mainly edema of the lungs, hepatic lesions of varying degrees, and inflammation of the lymph nodes in the chest. In sporadic cases, pneumonitis foci with fibrinous exudation or pulmonary membrane adhesions.

4。In addition to the differential diagnosis with swine fever and erysipelas, acute pharyngitis cases should be different from acute anthrax pigs with enlarged spleen and pulmonary disease.

5。Prevention and control methodsThe fundamental method of prevention and control of this disease must implement the principle of prevention first, eliminate or reduce all undesirable factors that reduce the resistance of pigs, strengthen feeding management, and do a good job in veterinary health to enhance the resistance of pigs; Vaccinations are given regularly in spring and autumn every year. At present, China uses two kinds of vaccines, one is the swine lung disease aluminum hydroxide formaldehyde vaccine, after weaning the size of the pig will be injected subcutaneously 5 ml, 14 days after the injection to produce immunity, the free banquet limb epidemic period is 6 months.

Oral administration of swine lung disease attenuated freeze-dried vaccines, diluted with cold water according to the head of the bottle label, mixed human feed or water to feed pigs, all oral 1 head, immunization period of 6 months.

The most acute type: commonly known as "lock throat wind", the body temperature is above 41, the throat is swollen, and the severe can affect the root of the ear and neck. Sick pigs have difficulty breathing at a high altitude and open their mouths to breathe.

Cyanosis of the visible mucous membranes, foam from the mouth and nose, often in a canine sitting position. Erythema appeared in the lower part of the body, once respiratory symptoms appeared, the condition deteriorated rapidly, and soon died, with a mortality rate of 100%, and some sick pigs showed symptoms of sepsis, and they did not see the symptoms, and died suddenly.

Acute type: predominantly presents with fibrinous pleuropneumonia symptoms. High body temperature, dry, short, crampy cough, dyspnea, purulent discharge from the nose.

Severe pain in the chest on palpation. **There are erythema or bleeding spots. Generally 4-6 days suffocation to death, immortality turns chronic.

Chronic: Presents with symptoms of chronic pneumonia or chronic gastroenteritis. Sick pigs have persistent cough, dyspnea, loss of appetite, often diarrhea, high and low body temperature, gradual emaciation, some joint swelling, ** crusty eczema, most of them die due to failure, and the case fatality rate is 60% 90%.

Some swine lung disease and swine fever are co-inhabited. It is difficult to diagnose the disease based on clinical symptoms alone, and it is necessary to take heart blood, various exudates and various solid organs to be sent to the veterinary laboratory for examination.

Answer: (1) **The most acute case is often too late due to the acute onset of the disease, and the sick pig has died. Penicillin, streptomycin and tetracycline have certain curative effects on swine lung disease.

Antibiotics are used in combination with sulfonamides, such as tetracycline + sulfadimethazine, tylosin + sulfadimethazine, which is more effective. 914 also has a certain effect on the disease, generally acute cases can be injected once, if necessary, it can be repeated once every 2 3 days.

2) Prophylaxis Preventive immunization. In spring and autumn every year, we regularly use porcine lung disease aluminum hydroxide formaldehyde vaccine or porcine lung disease oral attenuated bacteria for 2 immunizations. It can also be used as a swine erysipelas, porcine lung disease aluminum hydroxide double vaccine, swine fever, swine erysipelas, swine lung disease attenuated triple vaccine.

Antimicrobial drugs are contraindicated for a few days before and for 7 days after vaccination. Improve feeding management. Early weaning is advocated when conditions permit; Adopt all-in, all-out production procedures; Closed herds to reduce the number of pigs drawn from the outside; Reducing the density of pigs, etc., will help to control the disease.

Pharmacological prophylaxis. For frequently ill pig farms, antimicrobial drugs should be added to the feed for prevention.

The prevention and treatment of this disease should be based on prevention, and comprehensive prevention and control measures should be taken. In addition to strengthening feeding management, keeping the pig house clean and disinfecting regularly, preventive injections should also be done to find sick pigs and leave them in time.

1) Planned immunization: breeding boars and breeding sows are injected with swine pneumonic disease vaccine once a year in spring and autumn; Fattening pigs are generally injected with pig lung vaccine once at about 60 days of age, which can produce strong immunity.

2) Sick pigs: penicillin 800,000 1.6 million IU, streptomycin sulfate, vitamin C injection 10 15ml, an intramuscular injection 2 times a day, for 3D (50kg weight pig dose).

3) Traditional Chinese medicine**: Fritillaria, almond, soft winter flower, gardenia, tangerine peel, coria seed, melon ten.

2. Prevention and control of common pig diseases 349 kernels 15g each, 20g of skullcap, 25g of honeysuckle, 10g of licorice, decoction, wait for temperature to take internally, 1 dose per day, several doses.

Porcine lung disease, commonly known as "lock throat wind" and "swollen neck plague", is caused by Pasteurella multocida. In spring and autumn, sudden climate changes often occur, generally sporadic and sometimes endemic. It is pathogenic to a variety of animals and humans.

Acute cases present with high fever, acute pharyngitis, high degree of neck redness and swelling, dyspnea, often in a dog-sitting position, elongated head and neck breathing, and foam from the mouth and nose. Chronic cases are characterized by symptoms of chronic pneumonia and gastritis.

To prevent and control this disease, it is necessary to insist on the vaccination of healthy pigs in spring and autumn every year, and the dual inactivated vaccine of swine erysipelas and swine lung disease or the inactivated vaccine of swine lung disease can be used. Antibiotics**, penicillin, streptomycin, tetracycline and sulfonamides can be used to prevent the disease. In large groups**, antibiotics can be mixed into drinking water or feed and fed.