One or several pigs in the farm will suddenly die without any obvious symptoms. If the onset time is a little longer, the body temperature will rise above 465438 0.5℃. Sick pigs are mentally ill, and their food intake is weakened or even lost. The sick pig opened his mouth and stuck out his tongue, and his breathing was blocked, so he took the posture of a dog sitting. With the development of the disease course, circulatory failure occurs, the skin of nose, ears and upper limbs of sick pigs is cyanotic, and bloody secretions flow out of the nose and mouth in a foam shape, and the sick pigs die after 24 ~ 36 hours. This sick pig is usually transformed from an acute case. The body temperature of sick pigs is generally normal or slightly increased, the appetite of sick pigs decreases, accompanied by sudden or intermittent cough symptoms, and the weight gain rate decreases. However, among the pigs with chronic infection, there will be some pigs with recessive infection. If these recessive infected pigs are attacked by other pathogenic microorganisms, their condition will be aggravated. Pigs suffering from this disease are mostly acute in clinic, which should be differentiated from swine pneumonia, swine erysipelas and multiple serositis.
The disease is mainly caused by acute pigs, which will suddenly occur in clinic, with short course of disease and high mortality. Sick pigs have poor spirits, persistent high fever, loss of eating ability and vomiting symptoms. Conjunctival congestion, fecal excretion and mucus adhesion in pigs. Lactating piglets and newly weaned piglets will suddenly get infected, have obvious neurological symptoms, and die after falling to the ground, with a course of less than one day. Clinically, the most common disease in pigs is acute infection, which is manifested as fibrous pleuropneumonia. In addition to septicemia, the body temperature of sick pigs increased to 40-465438 0℃ at the beginning of the disease, accompanied by spasmodic dry cough, runny nose and purulent conjunctivitis. Sick pigs are constipated at first, then diarrhea and dyspnea, mostly in the sitting position of dogs. They feel pain when touching the sick pig's chest, and there are obvious gongs and rubs when auscultating. Most pigs suffocate. The course of disease is 4~6 days, and the pig will become chronic infection if it does not die.
Neurosis is a human disease, also known as neurosis or neurosis, which belongs to a group of mental disorders, including neurasthenia, anxiety, obsessive-compulsive disorder, phobia, somatoform disorder and so on. Patients feel pain, which hinders their psychological or social functions, but there is no verifiable organic pathological basis. With the development of large-scale pig raising and the popularization of positioning column feeding mode, sows have lived in a monotonous state for a long time. In addition, in order to prevent stress from causing sow abortion, the pig farm will also reduce the stimulation of environmental factors to sows. In the long run, the regulatory function of sow's nervous system, especially the autonomic nervous system, will decline, and the autonomic nervous function of sow will be disordered, showing neurosis. Sow neurosis is a disorder of autonomic nervous system. Some behaviors of sick sows in controlling autonomic nervous system will be abnormal, such as hypothermia (the normal body temperature of pigs is 38℃~39.5℃), gossiping about sows, gossiping with other sick pigs, biting people, bumping into railings and so on. Lactating sows refuse to breastfeed piglets (especially primiparous sows, and may even bite piglets), and boars are frigid.