Different stages of raising pigs have different characteristics of the disease, some of which are the most important diseases, as well as secondary infections and abnormal diseases that occur under the pressure of mycotoxins. Some diseases run through all stages of swine production, such as swine fever, foot-and-mouth disease, reproductive and respiratory syndrome, pseudorabies, and mycoplasma pneumonia. Some diseases have different characteristics at different stages, or they have different importance, such as the large intestine. Bacillus can cause jaundice and white diarrhea in suckling piglets. It can also cause diarrhea in weaned piglets. E. coli in sows can cause mastitis, metritis, and lactation disorder syndrome. Pseudorabies virus can cause miscarriage in sows and can also cause Diarrhea, respiratory diseases, and neurological symptoms in piglets. [Suckling piglet stage] The main diseases are red piglets, yellow and white piglets, rotavirus diarrhea, and piglet coccidiosis. Hung Hom mainly occurs within 3 days after delivery, characterized by acute hemorrhagic diarrhea, and the mortality rate of this disease is quite high. The direct cause is Clostridium perfringens infection. The indirect cause is environmental sanitation, incomplete disinfection, etc. It is also related to low ambient temperature. Piglets jaundice and piglet white diarrhea occur from the third to the seventh day post partum, and the direct cause is E. coli infection. The indirect cause is low ambient temperature, sow mastitis, metritis, and lactation disorder syndrome or low feed intake. The amount of lactation is reduced. There is also a direct relationship between the diarrhea of ​​piglets and their birth weight. Sometimes the new cast iron floor has a lot of burrs that can damage the joints and increase the incidence of arthritis. Management points sow management: Before sows enter the farrowing room, the floor and the pens in the delivery room must be thoroughly disinfected and dried for at least one week before entering the pigs. The sow must be cleansed and disinfected whole body, especially the genitals and breasts. The temperature of the delivery room should be appropriate, and the temperature of the delivery room in summer will affect the sow's feed intake, resulting in a decrease in milk production. In winter, if the temperature of the piglets is low, the resistance of the piglets can be reduced, and the incidence of diarrhea can be significantly increased. Piglet management: Piglets should eat colostrum as soon as possible, that is, enough colostrum is eaten within 6 hours of delivery to obtain a large amount of maternal antibodies, reduce diarrhea and other diseases such as swine fever and disease No. 5. Pigtails and cutting instruments should be disinfected to reduce the chance of infection through the wound. After the operation, it is best to inject a single antibiotic to prevent streptococcal infection. Drug prevention: 1 week after prenatal and postpartum sow feeding, adding 100 ppm of chlorogenic acid and 400 ppm of chlortetracycline to the diet will significantly reduce the occurrence of sow uteritis, mastitis, and lactation disorder syndrome, increase milk production, and increase the number of suckling piglets. The feed intake reduces the incidence of diarrhea. If the respiratory disease in the later period is severe, the net raw material of 150 ppm + colistin sulfate 100 ppm may be added to the opening material for 2 weeks. 4-5 days old piglet fed with anticoccidial drugs such as bacillus can prevent diarrhea caused by coccidiosis. [Conservation stage] This stage is the stage where the piglets have the lowest resistance, because the resistance of the piglets is reduced after weaning, switching, reloading, and high-density feeding stress; furthermore, the maternal antibodies before and after weaning have been reduced At the lowest, the active immune response to vaccination has not yet been produced. In order to keep warm, the doors and windows of the pig house are closed, which restricts the circulation of air, greatly increases the concentration of ammonia and other harmful gases in the air, and reduces the resistance of the respiratory tract. Therefore, the nursery piglet stage is the stage most susceptible to disease. Although some diseases do not occur in the nursery stage or occur rarely, most of them are infected at this stage. Numerous diseases that are susceptible to infection at the nursery stage, such as post-weaning diarrhea, reproductive and respiratory syndrome, pseudorabies, type II streptococcal meningoencephalitis, post-weaning multisystemic debilitating syndrome, Haemophilus parasuis, colonic spirochete infection, Ileitis, swine dysentery, and arthritis can cause typical or atypical swine fever. If the amount of mycotoxin in the feed exceeds the standard, the disease at this stage may become more complicated and blurry as if looking at the fog. Once the above problems occur, the nursery is prone to stagnation, generally affecting growth for 3-7 days, and severe pigs may become stagnant pigs. Mortality and elimination rate increased. Frequent vaccination at the nursery stage can also affect piglet growth. Management points Strengthen feeding management: When weaning, piglets should be bred according to their weight, so that piglets in the same column can maintain similar feed intake. Otherwise, the uniformity is poor and the resistance of thin piglets is lower. The ambient temperature of weaned piglets must be controlled above 28oC, especially during the first week after weaning. Increasing the temperature of the environment will help improve the piglet's resistance and increase feed utilization. To ensure air quality, reduce the chance of infection of respiratory diseases. Minimize the rearing density of nursery pigs as density and growth rate are inversely proportional. Creating a comfortable environment can maximize piglet production performance. Feed: Using good quality feed, or adding enough vitamins and minerals can reduce the adverse effects of stress on piglets. Try to stimulate the piglets' appetite and increase feed intake. Tests have shown that after eating 100 grams more per day after weaning, a weight increase of 1.5 kg will be achieved at the end of the nursery period, and the full development of the immune system will be ensured. Adding 3 kg/ton of mycotoxin adsorbent to the feed minimizes the immunosuppression caused by mycotoxin contamination. Drugs: After feeding the weaned diet, net 100 ppm of astragaloside and 400 ppm of aureomycin were added for 2 weeks. It can prevent the infection of Mycoplasma pneumoniae, Haemophilus parasuis, Actinobacillus pleuropneumoniae, Treponema hyodysenteriae, Lactobacillus intracellularis, Helicobacter pylori infection, and improve the health of pigs. If the streptococcal infection after weaning is severe, 175ppm of amoxicillin may be added on the basis of the above formula. This seems to increase the cost of feed, but due to the improvement of the pig's health, it saves the cost of injecting drugs and waste of manpower. And can accelerate growth, and ultimately reduce production costs. Growth and fattening stage The resistance of growing-finishing pigs is stronger than that of nursery pigs. Under normal circumstances, the incidence and mortality are very low, but some diseases will still occur at this stage. Such as respiratory disease syndrome, Actinobacillus pleuropneumonia, swine dysentery, colitis, ileitis and so on. The acute losses caused by these diseases are not significant, but due to the slow growth, the feed conversion rate is reduced, and ultimately the production cost is greatly increased. Most of these diseases are infested during the nursery period. Therefore, if we can improve the husbandry management and drug prevention at the nursery stage, the incidence of growth and fattening will be greatly reduced. Management Points Feeding Management: The density of herds must be reasonable. Practice has shown that the higher the density, the greater the possibility of respiratory diseases in herds. Feed: Add 3 kg/ton mycotoxin adsorbent to feed. Drugs: According to the onset of the farm, one week before the onset of illness, adding 100 ppm of Zhiyuan, 400mg of chlortetracycline, or 150-200ppm of doxycycline to the diet for 7 days can effectively prevent the occurrence of respiratory disease syndrome. , reduce the incidence of pleuropneumonia, but also can prevent swine dysentery, colitis and ileitis. Breeding gilts are the future and hope of a breeding farm, and special attention should therefore be paid to the management of gilts. The gilts are not immune to many diseases and therefore may not be able to protect piglets through colostrum, and may even spread the disease to their offspring. For example, the positive rate of mycoplasma in gilts can reach 70%, the positive rate of 2-4 fetuses in mycoplasma is only 40%, and the incidence of proliferative bowel disease (ileitis) is also significantly higher than that of sows. The main problem of sows is reproductive failure, which can be caused by environmental factors, nutrition, and improper feeding and management. Of course, the main cause is still some infectious diseases. Such as reproductive and respiratory syndrome, pseudorabies, leptospirosis, atypical swine fever, toxoplasmosis, eperythrozoonosis. The gilt management program General gilts need to go through 2 selections to qualify. The percentage of sexually-born piglets born in June-September was more than 23% lower than those born at other times. After the initial selection, the second selection should be completed before the breeding. Pigs that are allergic to the vaccine, pigs that are slow growing and anemic, pigs that have pale skin, back hair that stands upright and trembles when stimulated with cold water should be eliminated. Vaccination and deworming: Vaccination of most vaccines, such as swine fever vaccines, foot-and-mouth disease vaccines, parvovirus vaccines, and sometimes even Japanese encephalitis vaccines, should be completed before breeding. Drugs are used to drive off parasites in and out of gilts. Feeding management and aphrodisiac: control feed intake, control the shape of the gilt, not too thin, nor too fat, otherwise the heat is not normal. Drug purification: Adding 100 ppm of genomics, 400 ppm of chlortetracycline to the gilt diet, and 7-10 days before mating, can purify mycoplasma, ileitis, pleuropneumonia, and swine dysentery. After mating until delivery, the pig production will be very stable. Reproductive disorders caused by infectious diseases rely mainly on taking biosafety measures in combination with vaccination. Reproductive disorders caused by environmental problems can be prevented by improving the environment and strengthening management. For example, an abortion caused by excessive temperature can be achieved by dropping water, reducing the density, increasing ventilation, etc. Sows are particularly sensitive to high temperatures at the stage of mating to embryo implantation, and attention should be paid to cooling at this time. Feeding is strictly as required to maintain the body shape of the pig. Such as 80 days before the feeding, strengthen nutrition later. Nutrition must be balanced, pay attention to supplement vitamins A, D, E and biotin. In short, there are a lot of pig diseases. Effective control of swine disease at different stages cannot rely solely on vaccines and/or drugs, but must be combined with improved feeding and management, and enhanced biosecurity. Any kind of medicine can be used only if it is used reasonably. For continuous production of pig farms, to control the epidemic of infectious diseases, all-in and all-out must be strictly implemented at all stages. Preventing accidents will greatly reduce the production costs of the farm.