The pig infectious gastroenteritis

Pathogenic characteristics

Pig infectious gastroenteritis (TGE) is caused by the pig infectious gastroenteritis virus (TGEV), belonging to coronavirus coronavirus genera. Virus particles assumes the circular, oval, or polygon, the diameter is about 90-200 nm, double membrane, petal sample protrusions on the outer membrane. For single strands of RNA, the virus nucleic acid complete TGE virus in sucrose density of 1.19 1.218 g/ml. TGE virus is sensitive to a variety of chemicals, such as ethyl ether, chloroform, etc., but for bile resistance, acid resistance, virus is sensitive to heat, 56 ℃ for 30 minutes can quickly inactivated.

epidemic

Illinois found in the United States since 1933, TGE has reported in many countries and regions in the world, especially in the north latitude 30 degrees north temperate zone and frigid zone area. China's jilin, shaanxi, sichuan, hubei, Taiwan, Beijing, guangzhou and other places also have occurred. Globally, TGE often endemic or distributing features, occasionally there will be a pandemic.

Route of transmission

TGE mainly spread through the digestive tract, or respiratory tract and vertical transmission. Virus exists in the faeces of sick pigs, spread through contaminated feed and water. The clinical manifestations of the infection after including the symptom such as vomiting, diarrhea and dehydration.

clinical signs and symptoms

TGE typical clinical manifestations of a sudden vomiting, then a sharp watery diarrhoea, manure yellow, weak green or white. Sick pigs quickly become dehydrated, lose weight, become listless, and have rough, shaggy coats. For adult male sow feeder pig, pig, and mainly anorexia or disappear, watery diarrhoea, waste water was yellow green, light gray or brown, mixed with air bubbles; Nursing sow lactation to reduce or stop, 3 ~ 7 days after get better immediately restore, rare death.

Pathological changes

The main lesions are in the stomach and small intestine. Stomach is full of curd piece, gastric mucosal hyperemia, sometimes have haemorrhage; Small intestinal wall thinning, intestinal yellow-green or pale liquid, which contain bubbles and curd. Lack of chyle in small intestine mesenteric lymphatic vessels.

Diagnostic Methods

Diagnosis usually requires laboratory testing, such as collection of stool samples for TGE virus nucleic acid testing or antigen testing. In addition, the doctor may recommend routine blood examination to evaluate inflammatory response level.

Prevention and control measures

There is no effects of drugs for treatment. The recommended treatment measures include stopping or reducing food intake, giving more clean water or easily digestible feed, and rehydration or rehydration salts for piglets. Because the disease incidence rate is very high, transmission is fast, once the onset, isolation and disinfection measures ineffective. Rehabilitated pigs can develop some immunity, and the epidemic can be stopped after the pig population. Can try TGE weak poison vaccine for prevention.

conclusion

To sum up, the pig infectious gastroenteritis is a global epidemic caused by TGE virus, its clinical features is vomiting, watery diarrhea and dehydration. The virus is sensitive to a variety of chemicals, but has resistance to the bile, and is sensitive to heat. There is currently no specific medicine for the treatment of, but can be weak poison vaccine for prevention. On the diagnosis, rely mainly on laboratory nucleic acid detection and blood routine examination. Given the highly contagious, prevention and control measures need to improving management and sanitary conditions.