“Don’t suspect that a herd is caused by a virus or bacteria.†Zhang Guihong, a professor at the College of Veterinary Medicine, South China Agricultural University, reminds farmers that the incidence of herds is more likely to be from the perspective of nutrition or management in addition to pathogenic reasons. To analyze, the epidemic is only a small part of the farming process. “Now we only pay attention to whether pigs eat or not, and don’t care whether pigs eat well or not.†Dr. Fan Fuhao, director of the Center of Laboratory for Determining the Breeding of the Ministry of Agriculture, also said that in recent years, some farmers have put the cart before the horse, only concerned about the disease and lack of nutrition. demand.
“Pigs have always considered epidemic control as a veterinary issue and rely too much on vaccines and drugs.†Professor Liu Dewu of the Faculty of Animal Science at South China Agricultural University believes that vaccine immunization is an effective means of controlling diseases, but it is not effective for all diseases. . In the current complex culture environment, drugs are no longer the "miraculous cure" for diseases. He believes that husbandry management and environmental control are key factors in the prevention and control of large-scale swine farm epidemics.
"We have found that many pigs have a high poisoning index in the affected pigs." Fan Fuhao used the pig farm to report that the sow had a serious miscarriage. Initially, she was suspected to have blue ear disease, but the blue ear was inoculated in an emergency. After the vaccine, the phenomenon of miscarriage has not only been reduced but has intensified. After laboratory etiological surveillance, the blue-ear virus and pseudorabies virus were excluded, and the level of swine fever antibody was also within the scope of protection. At the end of the inspection of the health index, it was found that the pig's poisoning index was very high. After the feed was changed on the farm, the abortion of the pig was controlled.
Indeed, farmers tend to focus only on clinical conditions and forget about the original nutritional needs of the pig's body itself. For example, in the absence of certain trace elements, amino acids or vitamins in the body, the disease is easily invaded, and the sow is one of the vulnerable groups.
“The sow's reproductive performance is declining, and sometimes it is not only the cause of the disease,†said Zhang Ruohan, chief technical officer of Techno Nutrition, VA, VE, folic acid, VC, arginine, proline, carnitine, carotene, betaine. Both are trace elements that affect sow reproductive performance. When VE is absent, the sows have no obvious estrus or low fertilization rates, abnormal embryonic development, miscarriage, stillbirths, and weak fetuses, and can cause fetal ablation when severely deficient. The lack of valine will lead to a decrease in the lactating power of the sow, prolonged empty period, and decreased immunity. “The pig farms often think that the combination of these trace elements has been considered in the feed formulation. However, it is not taken into consideration that the trace elements in the feed are only enough to supply healthy pigs. When the pigs have stress or the disease is complex, the vitamin needs The amount will increase greatly."
“Weigh the weight to prevent and prevent it from governing.†Zhang Guihong said that although this concept has been advocated long ago, many farmers still stay at the level of governance. She believes that it is best to eliminate diseased pigs instead of treating them, because continuing to raise sick pigs will increase the risk of disease spread.
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