Ever heard of Sindbis virus or Middelburg virus? If you haven’t you’re not alone. But you might want to become familiar with them. South African researchers have determined that these “Old World viruses” have been causing considerable neurologic problems in a surprising number of horses—and we’re only just now realizing it.
An “Old World virus,” as opposed to a “New World virus,” is one that originates in the Old World before the Americas were discovered.
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