Achs is actively spread in most parts of China, including the southern part of the country, where large production capacity. Many animals can be infected with a virus, and it is a threat to the United States. The biggest concern, according to experts, are substances that are able to transport myself to Achs. Substances most at risk are food and feed ingredients.

 In 2014, the researchers found, the virus of porcine diarrhea (PED) first came to North America in 2013. Then presents a model of the spread of PED have clearly shown that certain feed ingredients retained the virus during a simulation of travel from Beijing to Shanghai and then to the USA. Except for diarrhea, China could "export" in commercial herds of American pseudoselector, classical swine fever, foot and mouth disease and more recently, ASF.

"We can reduce the risk of transmission of ASF with killing the virus feed additives or, for example, providing the efficient testing of feed on the purity of the epizootic," said Piburn.

Currently, to ensure the full diet of the animals from China to USA there are many amino acids, vitamins and minerals. Not all of them can be produced in the United States, therefore, to abandon the Chinese import of the country is not possible.