There are no blue-eared bacteria in pig farms. Will there be nameless high fever?

Is it necessary to vaccinate against highly pathogenic blue ear disease? Dr Cai, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences.

Without the blue-ear virus,

You don't have to worry.

Zhang Xiuwen, technical director of Beijing Xin Dewit Technology Co., Ltd. That's unrealistic. It is best to be immune to blue ear disease. If there is no pathogen of blue ear disease, you can consider using inactivated vaccine.

Su Xiaoqi, manager of biological products business department of Zhongmu Industrial Co., Ltd.

If your pig farm can be free from the pathogen of blue ear disease, of course, you don't need to worry about unknown high fever, and you don't need to get a highly pathogenic blue ear disease vaccine. Only under the current circumstances, we think that the situation of "no pathogen of blue ear disease" is only temporary, or an ideal situation.

Zhou Yongqi, director of the research institute of Nanjing Tianbang Biotechnology Co., Ltd. and manager of Zhang's technical service department, is just one of the reasons for the nameless high fever. Other diseases are as important or frequent as environmental factors such as swine fever and pseudorabies, so we should worry about and prevent nameless high fever in many ways. If the test of blue ear disease in your pig farm is negative, I still suggest that you do a good job in immunizing pigs with highly pathogenic blue ear disease vaccine, because it will be more sensitive to pigs that have not been infected or immunized with a certain pathogen. Once infected with a strong virus, it will often cause disease outbreaks and cause greater losses.

Li Fujin, technical manager of Qilu Animal Health Products Co., Ltd.

Just because there is no pathogen of blue ear disease in pig farms doesn't mean there is no threat. High fever, mainly blue ear disease, is highly contagious and spreads quickly. For the sake of safety, it is necessary to strengthen the epidemic prevention of highly pathogenic blue ear disease vaccine. The highly pathogenic blue ear disease vaccine is inactivated and will not bring new pathogens to pig farms.

Zhu, technical director and manager of technical service department of Ruipu (Baoding) Biopharmaceutical Co., Ltd., can hardly guarantee that there are no pathogens in the pig farm at present, nor can he guarantee that the pigs in the pig farm will not be infected with the virus in the future. Therefore, it is necessary to develop a highly pathogenic blue ear disease vaccine. Only by immunizing the whole country and surrounding areas with blue ear disease vaccine can the probability of PRRSV infection in pigs be reduced.

Li Tang, product manager of Shanghai Lihai Biopharmaceutical Co., Ltd.

Blue ear disease virus is not the only pathogen of "unknown high fever". The so-called "unknown high fever" is actually the result of the joint action of many pathogens, and blue ear disease cannot be equated with "unknown high fever". Therefore, there is no causal relationship between the lack of pathogens of blue ear disease in pig farms and the fear of "unknown high fever". Controlling blue ear disease well does not necessarily guarantee that there will be no "unknown high fever" in pig farms.

At the same time, it is difficult to find a pig farm with negative blue ear disease in China. If it still exists, it will be very dangerous unless the pig farm keeps all possible direct or indirect contact with the outside world and takes all biosafety measures, including introducing and, if possible, not letting flies go. In fact, biological safety measures are good for controlling pig diseases, and must be done well. Vaccination is the most labor-saving and economical method to prevent and control epidemic diseases, and live vaccine is the best means to control blue ear disease.

Bai Chaoyong, Technical Director of Luoyang Pleco Bioengineering Co., Ltd. Unless your farm is SPF or you have enough evidence to show that there is no pathogen of blue ear disease in your farm, no one dares to say that there is no pathogen of blue ear disease in his farm under the current feeding conditions. Prevention and control of highly pathogenic porcine blue ear disease is a long-term work, which needs to be adhered to and must not be taken lightly.

If Li of Mudanjiang Jinyuan Breeding Co., Ltd. does not have the pathogen of blue ear disease, it is a very difficult job. It is difficult for ordinary fields not to be infected with blue ear disease or even highly pathogenic blue ear disease. Unless it is in SPF field, blue ear disease will spread through many ways (pigs, air, birds, etc. ), and the occurrence of the disease is uncertain. Even well-managed fields can't guarantee that blue ear disease won't happen, so we should be less lucky, less negligent, and always be vigilant to prevent some serious infectious diseases.

It should be a highly pathogenic inactivated blue ear disease vaccine produced by a manufacturer designated by the Ministry of Agriculture, which is safe. At the same time, it is necessary to determine whether to make inactivated vaccine of highly pathogenic blue ear disease in time according to the actual situation and surrounding conditions in your field.

At present, domestic pig farms are generally infected with blue ear disease, and there are few pig farms without infection, but it is not without it. Some pig farms that have been closed for a long time are not infected with blue ear disease, and some new pig farms are not infected with blue ear disease.

The absence of blue ear disease in pig farms does not mean that there is no blue ear disease virus in pig farms. Pigs will not get sick immediately after being infected with blue-ear virus, but their immunity will decrease, and pigs will get sick only under certain stress.

Even if there is no blue ear virus infection, pigs will have "unknown high fever" and "unknown high fever". The causes of pig diseases are complicated, and blue ear virus infection is one of the reasons. Others, such as circovirus, can also cause low immunity in pigs.