What pig farms are there in Yangzhou? What infectious diseases do pigs in pig farms usually get? It is best to provide some infectious disease data of pigs in recent 5 years. Thank you very much.

Diseases that can lead to sudden death of pigs in Zhong Da

(1) Aspergillus flavus poisoning

Pigs showed symptoms 5- 15 days after eating moldy feed. Acute cases can die during exercise or within two days after onset. The sick pig looks listless. Loss of appetite or failure to eat, weakness of hind limbs, and unsteady walking. Mucosal yellow staining, normal body temperature, dry stool. Death within a few days after onset, or asymptomatic sudden death.

(2) Acute erysipelas

At the beginning of the epidemic, some healthy pigs suddenly died without any symptoms. Most sick pigs have reduced their diet, or vomited and trembled, and their body temperature suddenly rose above 42℃. They often lie down and don't want to walk, and their stools are dry. Some late diarrhea; Erythema of different shapes and sizes appeared on the skin, which disappeared when the finger was pressed. If piglets get erysipelas, they often have neurological symptoms of convulsions.

(3) Intestinal bleeding syndrome

Refers to sudden death syndrome caused by massive intestinal bleeding in pigs. The incidence is more common in SPF and lean-meat pigs, which can occur in pigs of all ages after weaning, but the incidence is higher in young reserve sows, 6-9 month-old boars and 4-8 week-old pigs after weaning. It is explosive and sporadic, and the course of disease is generally short. Stress factors are the inducement of this disease, especially the sudden stress death of sporadic boars and fat pigs aged 6-9 months and the discovery of small intestinal bleeding at autopsy confirmed this. The main clinical manifestation is sudden death, while the dead pigs and sick pigs in the same group mostly show pale skin, loose feces, blood or fibrin tubes, and others are normal. There are many stunts during the growth period, and bloody feces are discharged periodically. Autopsy shows that there is a lot of blood in the small intestine, and the bleeding usually spreads from the ileum to the whole small intestine and large intestine, and no obvious bleeding point can be found. In some cases, intestinal wall thickening changes occurred in different parts of the posterior segment of small intestine 1/3 segment, that is, proliferative hemorrhagic bowel disease. Chronic cases, due to secondary bacterial infection, can develop into necrotizing enteritis. The control method (1) added furazolidone 200mg/kg to the feed. (2) Control the infection of proliferative bowel disease and Campylobacter mucosa by adding 200 mg/kg tylosin or using penicillin 100 mg/kg in feed. (3) The combination of antihistamines, corticosteroids and vitamins in acute cases is successful.

(4) Sudden death stress syndrome

Mainly when stimulated by strong stressors, he died suddenly without any clinical symptoms. For example, boars are too excited and die suddenly during breeding; Pigs are too frightened when chasing, or too crowded when transporting, and so on. It may be because the nerves are too nervous and the activity of the "sympathetic-adrenal" system is too strong when severely stimulated, causing shock or circulatory failure, leading to sudden death. Prevention and treatment methods: According to the nature of stressors and stress syndrome, select specific prevention and treatment measures: (1) Eliminate stressors, improve feeding management, such as well-ventilated pig houses, and prevent hot and humid crowding, uneven cold and heat, noise and scratching. Do not feed or reduce feeding within 0/2-24 hours before slaughter, and drink oral rehydration saline; Pay attention to vehicle and boat transportation or land expulsion to avoid excessive stimulation; Or before transportation, apply anti-stress hormones, anti-stress additives or chlorpromazine and other sedatives to pigs sensitive to shock to prevent stress. For pigs suffering from heat stress and heatstroke, cold water is used for topping and cold water enema. (2) Pay attention to breeding. Pigs that are timid, nervous, difficult to manage, easy to panic, prone to erythema, elevated body temperature and plump appearance are mostly stress-sensitive, so it is best not to choose them as breeding. If necessary, the whole blood or serum CPK (phosphocreatine kinase) and halothane screening test should be carried out with modern technology before these pigs can be scoured out of breeding pigs.

Diseases that may lead to sudden death of piglets

(1) Swine dysentery

Piglets are 49-84 days old, which occur in four seasons, first acute outbreak, then chronic, and it is not easy to remove. At the beginning of the epidemic, she died suddenly without any symptoms. Different degrees of diarrhea mostly start from soft stools and gradually turn into yellow loose stools mixed with mucus or blood. It is mainly the swelling, congestion and bleeding of cecum mucosa, and the intestinal cavity is full of mucus with bran-like pseudomembrane. Microscopic examination revealed a large number of treponema pallidum in intestinal mucosa smear. Lijun Jing is effective both orally and by injection.

(2) Acute piglet yellow dysentery

1-3 days old is the most common and acute piglet that suddenly dies asymptomatic within a few hours after birth. The sick pig excretes yellow thin feces, which contains small pieces of curd and flows down the anus, leaving no traces of feces around, which is easy to be ignored. When diarrhea is severe, the tip and hind limbs of sow's vulva are polluted by feces, sick pigs eat little or no milk, have poor spirit, loose anus, incontinence, dehydration and emaciation, and finally fall to the ground and die in a coma.

(3) Leukemia (muscular dystrophy)

Leukemia mostly occurs in piglets around the age of 20, and the sick piglets are very healthy and suddenly get sick. Normal body temperature, loss of appetite, listlessness, shortness of breath, lying down, often sudden death. The cause of myopathy is selenium deficiency.

(4) Foot-and-mouth disease in suckling piglets

Usually accompanied by acute gastroenteritis and myocarditis and sudden death.

(5) edema disease of piglets

It often happens before and after weaning, and can happen all year round, especially for well-nourished and strong piglets, who suddenly get sick and die. Some have mild diarrhea before constipation, some have edema such as eyelids, or nervous system symptoms such as ataxia. Anatomical manifestations are mainly edema of gastric curvature, cardia mucosa and muscularis, jelly-like edema, and edema of mesentery and subcutaneous tissue.