禽流感病毒 z-bo 2020-10-20 748

　　The bird flu that hits many farms in the Midwest can be spread through many ways, including machinery, workers, rodents, and even wind.

　　Researchers from the Animal and Plant Health Testing Department of the Ministry of Agriculture have studied the genetic characteristics of virus samples from more than 80 turkeys and chicken farms. The study concluded that wild birds brought the virus to farms, and the omission of farm biosecurity and environmental factors is likely to contribute to the spread of the disease.

　　In the spring of 2015, the virus spread from Northwest farms to Midwest farms and experienced the most severe epidemic in the United States. In 15 states, more than 49 million poultry were killed or euthanized. Among them, turkey farms in Minnesota (the main state for turkey breeding in the United States) and chicken farms in Iowa (the main spawning country in the United States) were hit hard.

　　According to the United States Department of Agriculture, the staff said that the infected and uninfected farms shared some production facilities, the workers hired moved between them, and the vehicles were disinfected during the shuttle. I found it was not. Allegedly, there are still rodents and small wild birds in the poultry house.

　　The report is as follows: "We will summarize these observations and publish the findings in the form of an upgraded report. Currently, the USDA is working with related industries and related states to implement more stringent biosafety procedures, and at the same time across the country. Continue to search for and eliminate other possible means of transmission of diseases in poultry farms. "Researchers also found virus particles in air samples collected outside the infected poultry farms, and virus particles were found. We have proven that the virus can spread in the air. Preliminary analysis of wind speed data indicated that "there is a correlation between sustained strong winds and the increase in the number of infected farms after about 5 days."

　　The government is conducting more analysis on the environmental factors that may exacerbate the spread of the virus.

　　The US Department of Agriculture stated that it will continue to share its research results with state officials and the agricultural industry, and will hold a meeting in Iowa next month to focus on biosafety issues.