Wikipedia
African horse sickness
African horse sickness (AHS) is a highly infectious and deadly disease. It commonly affects horses, mules, and donkeys. It is caused by a virus of the genus Orbivirus belonging to the family Reoviridae. This disease can be caused by any of the nine serotypes of this virus. AHS is not directly contagious, but is known to be spread by insect vectors.
Usage examples of "african horse sickness".
And her trainer wrote to me to ask if I wanted to sell them, as of course owing to the African horse sickness quarantine laws we cannot bring South African horses to England.