Recently, the epidemic situation of African swine fever (ASF) and its related swine fever has intensified in many countries and regions around the world, which has caused a serious impact on the global pig breeding industry and caused deep concern about the stability of meat supply chain and food security. The epidemic has spread widely, spread quickly and is difficult to prevent and control, which has become a major animal health challenge faced by the international community.
First, the epidemic situation is multi-point distribution and regional aggregation, and the prevention and control situation is complicated and severe.
According to the latest report of the World Organization for Animal Health (WOAH) and the official reports of various countries, this year, there have been frequent warnings of swine fever in Europe, Asia, Africa and parts of America. In Eastern Europe and the Balkans, African swine fever continues to spread among wild boars and to commercial pig farms. Many countries in Southeast Asia still face the pressure of local epidemic after experiencing large-scale epidemic in the early stage, and sporadic outbreaks occur from time to time. What is even more alarming is that some countries in non-epidemic areas have also reported confirmed cases for the first time, indicating that the risk of cross-border transmission of the epidemic has increased significantly.
The transmission routes of the epidemic are complex and diverse. In addition to the traditional contact transmission, contaminated feed, means of transport, personnel mobility and illegal cross-border smuggling of live pig products are considered to be the key factors leading to the long-distance transmission of the virus. As the natural host of the virus, the expansion of the wild boar population has aggravated the risk of the epidemic spreading to farms. This coexistence of multi-point distribution and regional aggregation makes it extremely difficult to trace the source and block the transmission chain, which puts high demands on veterinary systems and cross-border cooperation mechanisms in various countries.
Second, the industrial chain has been hit hard, with far-reaching economic and social impacts.
The outbreak of swine fever has caused a devastating blow to the global pig industry chain. The first and most direct impact is the sharp decline in the number of live pigs. In order to control the epidemic situation, large-scale culling measures are often taken in epidemic areas and threatened areas, resulting in a sharp decrease in the supply of live pigs in the market in the short term. This not only caused heavy economic losses to farmers, but also caused many small and medium-sized farms to go bankrupt and have no livelihood.
Secondly, pork prices fluctuated sharply. The tight supply directly pushed up the price of pork in the local and international markets, which aggravated the pressure of global food inflation. As the world's largest pork consumer and producer, changes in supply and demand in major markets such as China have a significant impact on the global price index. At the same time, in order to protect domestic industries, many countries have introduced import bans on live pigs and pork products, which has seriously hindered international trade and further disrupted the normal order of the global meat market.
In addition, related industries, such as feed processing, slaughtering, meat processing, logistics and transportation, have been jointly impacted, resulting in fewer jobs and impaired local economic vitality. The uncertainty brought by the epidemic has also seriously hit the confidence of farmers in re-raising, and the industrial recovery cycle may be significantly prolonged.
Third, the international community actively responded and strengthened cooperation and scientific and technological support.
Facing the severe epidemic, governments and relevant international organizations are taking urgent action. On the one hand, strengthen domestic prevention and control measures, including upgrading the biosafety level, strictly supervising the transportation of live pigs and products, carrying out epidemic monitoring and epidemiological investigation, and making reasonable compensation to affected farmers. On the other hand, the intensity of international cooperation has never been higher. WOAH, the Food and Agriculture Organization of the United Nations (FAO) and other institutions continue to issue early warning information, coordinate regional prevention and control actions, and provide assistance to countries with weak technology and resources.
Scientific research is also accelerating. Although there is no commercial African swine fever vaccine on the market, scientific research institutions in many countries have made positive progress in vaccine research and development, and candidate vaccines show good prospects. Rapid and accurate diagnosis technology is also constantly optimized and popularized, which provides a powerful tool for early detection and timely disposal of epidemic situation. In addition, the in-depth basic research on virus variation, transmission mechanism and host immune response has accumulated valuable knowledge for ultimately defeating the epidemic.
Fourth, reflection and prospect: building a more resilient global pig industry system
The global outbreak of swine fever has exposed the fragility of the global pig industry in biosafety, disease monitoring and early warning and cross-border joint prevention and control. The lesson is profound and the warning is long. In the future, countries need to work together to build a more resilient and sustainable pig industry system.
This requires that biosafety must be placed at the core from the national level to a single farm, and a closed-loop management should be established throughout the whole chain of production, transportation and slaughter. At the same time, we must strengthen the construction of global epidemic monitoring network to realize real-time sharing and rapid response of epidemic information. Promoting the modernization and intensive transformation of farming mode and reducing the difficulties in prevention and control brought by small-scale farming are also the key to improving the overall anti-risk ability of the industry. In the long run, accelerating the development and marketing of safe and effective vaccines will be the hope of fundamentally controlling and even eradicating such diseases.
To sum up, the outbreak of classical swine fever in many countries around the world is not only an animal health crisis, but also a comprehensive challenge related to economic development, people's livelihood safety and global supply chain stability. In this critical period, it is very important to build a healthy internal defense line for pigs.
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