One of the symptoms of swine influenza
Symptoms of swine influenza
Swine influenza has a short incubation period of a few hours to a few days, spreading rapidly, and the whole group of pigs is infected with the disease at about the same time in about a week. Sick pigs body temperature rises to 40-41 ℃, the high case can reach 42 ℃. Sick pigs loss of appetite or abolition, depressed, muscle, joint pain, often lying down, unwilling to walk, forced to walk often limp, catching squeals. Sick pigs breathing rapidly, abdominal breathing, accompanied by paroxysmal, spasmodic cough.
Individual pigs have difficulty breathing, wheezing, coughing, abdominal respiration, canine sitting posture, can be heard at night asthmatic sound, individual pigs joint pain, especially the better-fed pigs more serious.
Second, the treatment of swine influenza
The treatment of swine influenza
1, swine influenza no special effective drugs, only the use of symptomatic treatment of drugs to reduce the condition, to avoid the occurrence of secondary infection.
2, take antibiotics or sulfonamides to prevent bacterial infection.
3, on the sick pigs available penicillin and streptomycin, plus virus spirit at the same time intramuscular injection, 2 times a day, for 5 days. A lot of people ask what drugs are used in the occurrence of swine flu with some good results, probably these drugs.
4, in the feed add antibiotics and antimicrobials, the proportion of 0.2%, can also make the disease effectively controlled.
Three, swine influenza epidemic characteristics
Swine influenza
Pigs are the natural host of siv, different breeds and age of pigs can be infected, the incidence rate is up to 100%, the lethality rate is low (1%), but piglets have a higher mortality rate. In addition, humans and birds such as turkeys can be infected with siv, and influenza viruses from both birds and humans can also infect pigs.
In recent years, there has been increasing evidence that influenza viruses of human and avian origin form new virus particles after viral gene exchange and rearrangement in swine, which in turn infects humans. In addition, pigs are intermediate hosts for human influenza viruses, and early human influenza viruses can be stored in pigs and re-infect people after a certain period of time.
Four, the laboratory diagnosis of swine influenza
The laboratory diagnosis of swine influenza
(1) In addition to the conventional diagnosis of clinical symptoms and pathological changes, the definitive diagnosis must be carried out to isolate the virus or the use of other means of proving the existence of pathogens, but also can be diagnosed by serological methods.
(2) For live cases, the virus is usually isolated from laryngotracheal or nasopharyngeal swabs after aseptic processing; for dead cases, lung and brain tissue are the preferred material. Diagnosis can also be made by hemagglutination (ha) and hemagglutination inhibition test (hi), neuraminidase inhibition test (ni), neutralization test, agar gel diffusion test, immunofluorescence assay, enzyme-linked immunosorbent assay (elisa), immunoperoxidase monolayer cell test as well as polymerase chain reaction (pcr), real-time fluorescence quantitative pcr technology.
The main lesions of the disease are in the respiratory organs. The mucous membranes of the nostrils, trachea and bronchi are congested and swollen, with a large amount of foamy mucus on the surface, and sometimes the mucus is bloody. The small bronchi and fine bronchioles were filled with foam-like exudate; the lesions in the apical, cardiac and middle lobes of the lungs ranged from red to purplish, collapsed, atrophied and solid, with obvious boundaries between diseased and healthy tissues; the hilar, bronchial, and cervical lymph nodes were edematous, and the sections were ectopic and succulent; and there was mucous and fibrous exudate in the thoracic cavity. The gastric mucosa was severely congested, patchy congestion occurred in the large intestine, and the spleen was slightly enlarged.