High fever, also called high fever syndrome, refers to high fever, high morbidity, high mortality characteristics of high fever syndrome, which can cause a large number of sows and fattening pigs died and eliminated. It is not a disease that breaks out in the high fever season. In addition to the spread of high fever syndrome, the original disease has also occurred in the pig farm re - onset, and the incidence is still very heavy. This is different from the general infectious diseases, because after the general infectious diseases, other pigs may have a certain resistance, the incidence of re infection should be lighter than the first time. Many of the first pigs that had escaped were not spared when the second shock wave arrived.
1 clinical symptoms;
The infection status of different farms is not the same as the clinical symptoms. Some pig farms begin with fattening pigs. Some pig farms begin with conservation, while others begin with sows. But no matter from that stage, all pigs will eventually develop infection, disease and death. The incidence of pigs at first showed elevated body temperature (usually above 41 degrees Celsius, and below 41 degrees Celsius). Because there was no final diagnosis at that time, many people called it "nameless fever". But recently, in some farms, the body temperature may be only 40 degrees.
The disease is characterized by high morbidity, high mortality and high body temperature (three high). All the affected pigs expressed appetite depletion; most of the infected sows suffered from miscarriage, premature delivery, stillbirth, most of which occurred at the later stage of pregnancy, and the condition of the resistant pigs was not ideal.
Some pigs runny nose, swollen eyelids, eye secretions increase; the incidence of days after the skin was blue purple, and even have obvious bleeding symptoms, especially the ears, buttocks and abdominal skin disease; individual pigs showed marked symptoms of central nervous system samples of limbs. The sick pigs also showed signs of respiratory and diarrhea, some of which had yellow water samples. Some pigs vomit, yellow stomach content, vomiting pigs are generally difficult to cure. Fever swine disease is difficult to use drug cooling, even if the temperature drops to normal by Analginum or amidopyrinum, porcine feed intake are not normal, and 2~3 hours after the temperature will rebound.
2 pathological changes
Pathological changes were not completely consistent. The diseased pig showed enlarged and edematous lung stroma and had hemorrhagic spots on the surface or in the section. There are many parts of lung disease of swine meat, especially in front of the leaf tip, leaf and leaf diaphragm, lung and pleural adhesions occurred basically no phenomenon of endotracheal foam mucopurulent more.
The spleen is enlarged or not enlarged, with many infarcts or serrated margins on the margin. Throat congestion and bleeding, foam like liquid inside. There was a dense size of the bleeding point, kidney bladder mucosa congestion, the surface has a lot of needle like bleeding, some pigs kidney surface of white spots, some white infarct size of maize. The whole lymph node was congested, bleeding, and edematous, but marble was not typical. Part of the pig's fundus mucosa bleeding and ulcers, colon and small bowel surface can also be seen serious bleeding spots, the ileocecal valve has a large number of ulcer foci; Meningeal congestion is mild, only the individual meningeal hemorrhage.
3 preventive measures
1 improve feeding management
According to the current serious viral diseases, recommended to choose the better use of virus strains such as iodine disinfectant.
2, strengthen nutrition, prevention of feed poisoning
Mycotoxins can cause poisoning in pigs, so be sure not to buy cheap feed or raw materials. Can be added in the feed to remove mildew static.
3 strengthen immunity
Classical swine fever and Pseudorabies may also be important mixed infection factors, so we must select qualified vaccine immunization, and the immune program should be reasonable. In order to improve the immune effect of classical swine fever or pseudorabies, we can use Astragalus antitoxin as a vaccine dilution.
4 treatment measures
Whether it is a high fever syndrome or other infectious diseases, the treatment is very difficult, so prevention is more important than treatment. Rapid response is also an important measure to reduce the loss, rapid and accurate diagnosis, rapid treatment or eliminated decision. First of all, in time to isolate the incidence of pigs, to determine whether there is no therapeutic value, there is the risk of transmission, the treatment of pigs of little value to resolutely eliminated. Remember, elimination is also an important way to reduce losses.
1) symptomatic treatment
Can not blindly use antipyretic, because the effect is not ideal, even if the fire down, and soon will rebound. The cause of death may be related to heart failure, lung and kidney failure, and injection of low temperature anorexia needle can be used to improve the intelligence.
Some herbal detoxification has a unique role, most of the current antibiotic therapy under the premise of Chinese medicine can try some heat, cooling blood, detoxification, such as muscle gland peptide, mixed tratch fever, high fever mixed serum, may have unexpected effects.
2) due therapy
1. caused by PRRS, circovirus, swine flu and so on
Muscle gland peptide + no di (mixed), the other side of intravenous injection of blood mixed clear,
Prevention and treatment: round blue bacteria poison resistance, high free discharge toxins, amoxicillin fed spices
2. unexplained fever and indigestion caused by various Difficult miscellaneous diseases can be selected
High fever mixed serum and intramuscular injection were respectively done
Prevention and treatment: avoid high row poison, Mycoplasma static, potent mix of feeding high
3. multiple pathogenic infections or secondary infections leading to low resistance and induced anorexia or fasting can be selected
Mixed tratch fever, high fever mixed serum were intramuscular injection can be serious with low temperature anorexia needle
Prevention and treatment: round blue root