African Swine Fever virus (ASFv) can be easily transmitted orally through both water as well as feed, according new US research, although doses required for infection are higher in plant-based feed.
That was the conclusion of research by a team of scientists at Kansas State University. The team, led by Dr Megan Niederwerder, assistant professor of diagnostic medicine and pathobiology, researched how ASF virus could spread in feed and feed ingredients. The study was published in Emerging Infectious Diseases, a journal published by the US Centers for Disease Control and Prevention (CDC).
ASF levels needed in liquid are very low
Dr Niederwerder’s team found that the level of virus required to cause infection in liquid was extremely low, demonstrating the high infectivity of ASF through the oral route. Although greater concentrations of virus were required to cause infection through feed, the high frequency of exposure may make contaminated feed a more significant risk factor.
In the abstract of the paper, the team explained that they used a strain that was isolated in the Caucasian country Georgia in 2007, and that they aimed to determine the minimum and median infectious doses of the strain through oral exposure during natural drinking and feeding behaviours.