1. There are many toxic factors that cause toadstool rearing caused by toxic factors, such as poor feed quality, long-term feeding or a feed to mold and mildew, feed processing modulation method is not appropriate, and some of the feed containing toxic and harmful substances, Such as cottonseed cakes, rapeseed cakes, potatoes, etc. without detoxification treatment, or unreasonable feeding methods can cause poisoning, causing pig hindquarters. These types of diseases can usually be diagnosed based on medical history, on-site investigations, and clinical manifestations. Such as salt, vinasse poisoning. Symptoms of salt poisoning: The initial symptoms of severe thirst, flushing of the mucous membranes, swelling of the lips, followed by excitement, no purpose of paralysis, circling, muscle spasms, was sitting in dogs, the last four limbs paralyzed, can not stand. Symptoms of vinasse poisoning: elevated body temperature, urge to breathe, skin rash, diarrhea, feces with mucus, odor. The poisoning of rapeseed cakes, cottonseed cakes, and potatoes is caused by excessive intake of toxic substances that have not been detoxified. The clinical manifestation of rapeseed cake poisoning is from time to time urinating sick pigs, increased frequency of urination, mucous membrane cyanosis, pink foamy liquid flowing out of the nostrils, and blood in the feces; after the cottonseed cake poisoning, sick pigs showed like drinking water, but the urine Less or difficulty urinating, often hematuria or hemoglobinuria, conjunctival congestion, post-yellowing, visual disturbances, blindness; potato poisoning mostly nervous system dysfunction, early excitement, drastic dryness, vomiting, abdominal pain symptoms In a short period of time, she became depressed, coma, or convulsions, weakness in the hind limbs, weak breathing, ataxia, dilated pupils, and edema of head, neck, and eyes. Second, biological factors Biological factors caused by pig's hind leg spasm can be divided into infectious and parasitic factors. Infectious factors Contagious factors cause swine morbidity, multiple waves and the entire population, and the group has the same clinical symptoms similar to toxic diseases, but the body temperature of these diseases rises. Some infectious diseases have obvious seasonality. For example, swine epidemic encephalitis B usually occurs in July-September and mainly affects piglets; Rhizoctonia disease mostly occurs in winter or early spring cold season; Bacterial intoxication mostly occurs in hot summers. Pseudorabies in pigs occurs mostly in winter and spring; Pasteurellosis in pigs takes place in the late autumn and early spring climate change seasons. In addition, in clinical practice, besides the general symptoms of epidemic encephalitis, drowsiness, and hibernation, swine epidemic encephalitis showed a sudden miscarriage in pregnant sows, the fetus was mostly stillbirth or mummy. Lateral testicular swelling. Piglet disease manifests as piglets are mostly sepsis, milder symptoms have neurological symptoms, often show movement disorders, do circle movement or walk without goals or head to ground, and some are lying on the ground, swimming in the limbs In the meantime, the larger boars walked with strong gait. The severe performance of the boars hindered both hind limbs and prevented them from standing and mopping. Porcine Clostridium botulinum poisoning is mainly characterized by progressive atrophy and paralysis of the muscles. It develops from the head to the back, causing difficulty swallowing, sagging ears, limb weakness to paralysis and lying. Pseudorabies in pigs is characterized by characteristic neurological symptoms, excitement, and labial fibrillation. There is no purpose to advance or do circle motions, hoarseness, paralysis of limbs, lying in the ground, and swimming in the limbs. However, pigs did not show symptoms of itching. The body temperature of pig Pasteurella was as high as 41Â°C, and the mouth breathed. The mucous membrane was blue-purple, and the nose and mouth flowed out of the foam with a bloody nose. It was a dog sitting posture. Throat pain and swelling in the throat, hard, and can affect the ear and neck. Swine fever and swine erysipelas can also cause rear foot spasms. Swine fever can infect pigs of different ages, sexes, and breeds. It can develop in all four seasons. The incidence and mortality rate are high. The epidemic is fierce and the fever is high. The excrement is dark and hard, such as dung ball, after Diarrhea, all kinds of antibiotic treatment are invalid. The pig erysipelas is now rare. The late stage of pseudorabies in pigs is also characterized by late palsy. The disease is usually sporadic and has no obvious seasonality, but it is more frequent in the warm season. The clinical performance was uneasy, frenzied, rampant, runny, attacking humans and animals, and often plunged into the grass, leaping immediately in the event of a sound, aimless running, swallowing difficulties, the final hindquarters paralyzed, lying in the ground. Infectious myelitis in pigs, the initial body temperature of the disease is as high as 40Â°C~41Â°C. Eye tremors are found in severely ill pigs. The head and neck bend backwards, and the muscles twitch. The dog is sitting or lying on one side. The sound or touch causes uncoordinated movements of the limbs. In addition, there are also some epidemics that have significant age-specificity. For example, edema disease mainly occurs in piglets before and after weaning at 5-15 weeks, and brucellosis mainly infects pregnant sows, and occurs in 30-50 days or 80-110 days after pregnancy. The meningococcal streptococcal disease occurs mostly in finishing pigs and piglets. The clinical manifestations of edema disease are head edema, convulsions, coma, ataxia, skin sensation and hypersensitivity, touching screaming, and dullness. The main symptoms of Brucellosis are the miscarriage of pregnant sows, the appearance of grayish or reddish-brown mucus from the vagina, or purulent mucus secretion from the vagina prior to abortion. The miscarriage fetus is mostly still or weak. The meningococcal streptococcal disease is clinically seen with bilateral or one-sided swelling of the jaw lymph nodes. The body temperature rises above 41Â°C. Conjunctival hyperemia, tearing, serous nose fluid, and lower neck, abdomen, and extremities. Violet, Breathing, èˆ»é¾‹ èˆ»é¾‹ æ° æ° æ° æ° æ° è¢« è¢« br br br / > å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ å¯„ç”Ÿ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ ã€‚ Toxoplasma gondii is more common in pigs and its symptoms are similar to swine fever and swine erysipelas. The difference is that: the erythema on the skin of the affected pig does not protrude from the skin surface, and there are no edges and corners. The inguinal lymph nodes are swollen; in addition, the pigs breathe. Difficulty, abdominal breathing or sitting posture; swine fever mainly affects 3 to 6 months old piglets. When the larvae migrate to the lungs, it can cause swine mite pneumonia, cough, dyspnea, elevated body temperature, and loss of appetite. Absolutely, lying in the ground, more than the formation of stiff pigs, sometimes causing jaundice, intestinal blockage or intestinal rupture. Third, the nutrient metabolic factors Nutritional metabolic factors caused by pig rear tinea more than the amount of dietary feeding or the increase in the amount required, caused by nutritional imbalance in the diet. Among them, the lack of vitamins and minerals is the most common. These diseases can often be differentially diagnosed on the basis of investigations of feeding conditions, understanding of physiological conditions and production performance, and clinical features. Such as delirium and hypoglycemia, they only occur in piglets, and postpartum delirium occurs only in postpartum sows, white muscle disease has a clear regional. The typical symptom of piglet rickets is the large pig bone long bone end, the ribs and ribs cartilage junction was significantly enlarged, and the formation of circular nodules, limbs and joints bone swelling, showed double joints, when standing, the limbs bent, serious showed " X" or "O" limbs. Hypoglycemia is more common in piglets less than one week after birth. It mainly occurs in the winter and spring seasons. It shows weakness in the limbs, instability in the gait, recumbency in the back ground, convulsions in the back, and head reflexes. The sows were postpartum paralysed and showed hard limbs, uneven pace and ataxia, and difficulty in standing. Lying on the ground, pain is reflected gradually, and the anal reflex disappears and relaxes. In addition, copper deficiency in piglets also causes hindquarters spasms, while large pigs rarely occur. When the piglet lacks copper, the hindquarters of the ataxia diverge, the knee is in a squat posture, and it is easy to fall when making a sharp turn, and the hindquarters are paralyzed. Vitamin A, vitamin B1, vitamin K deficiency will cause the onset of pigs of all ages. When vitamin A is lacking, the skin is dry, itchy, and dermatitis and skin rashes often occur. Severe ataxia, unsteady steps, and hindquarters spasms are caused. In the absence of vitamin B1, muscle atrophy is mainly manifested in addition to hindlimbs. In the absence of vitamin K, the subcutaneous hemorrhage area is markedly swollen, lame, anemic, and lying. White muscle disease has obvious regional characteristics. It occurs in piglets of 2 months of age and finishing pigs of 4 to 5 months of age. The diseased pigs are characterized by rough hair, anorexia, diarrhea, hibernation, pale skin, and common forelimbs. Dog sitting posture. The disease is caused by lack of selenium and vitamin E. Fourth, hereditary factors Hereditary factors caused by pig rear trunk are mainly two diseases: one is hereditary rickets, the other is congenital tremor of piglets. Hereditary rickets and dystrophic rickets are similar, the difference being that the former is healthy at birth, followed by hypoglycemia and hyperphosphataemia. Hereditary congenital tremors in piglets are characterized by muscle tremors, ataxia, difficulty standing and screaming. This disease occurs mainly in British white-shoulder pigs and Danish Landrace pigs. Fifth, other factors In addition to the above four can cause pig hindquarters, there are other factors such as damage, etc., can also cause pig hindquarters. For the hind paws of pigs caused by injury factors, the skeleton or tendons are damaged due to external forces such as falling, driving, and colliding. Especially after the external force of the lumbar support is more likely to cause posterior paralysis. It is manifested that after a collision, a healthy pig suddenly suffers from a fracture or nerve injury that causes it to swell, deform, and necrosis, leading to nerve palsy, or structural changes in the mechanics, and hindpaw. Postpartum delirium is a nutritional metabolic disease that occurs suddenly within a few hours to five days after the birth of a sow. (1) The sick pig showed difficulty in standing, swinging his hindquarters, cautious walking, unstable hindquarters, sensitive reflection of muscle pain, sharp decrease in appetite or food refusal, dry or stop row of stool, urine red, normal or slightly lower body temperature. Lack of milk or no milk. (2) There were neurological symptoms such as dullness or disappearance of consciousness, limb paralysis, and mental apathy during the late stage. Prevention programs (1) Pregnant sows should be fed full-rate feed, especially in the late pregnancy must supply vitamins and minerals and other nutrients. (2) Prevent and treat constipation, feed green grass and vegetables, or take 30 to 100 grams of magnesium sulfate or sodium sulfate daily. (3) Intravenous injection of 10% calcium chloride 30-50 ml. (4) Intravenous injection of 10% calcium gluconate 100-150 ml. (5) Vidin gelatin calcium injection 4-8 ml, intramuscularly, once every other day, once every 10-15 times. (6) Choose 10-15 grams of calcium lactate or calcium carbonate, mix and serve orally, once a day for 1 week.
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