Australian authorities might have identified the cause of unusual neurologic signs in horses in New South Wales, Victoria, and South Australia, according to a report from the New Zealand-based website Horsetalk.

Horsetalk indicated that researchers have found two different types of infection in affected horses: alphavirus infection (i.e., Ross River virus) and flavivirus infections (i.e., Murray Valley encephalitis virus or Kunjin virus).

Both alphaviruses and flaviviruses are arbovirus subtypes, meaning they are spread by mosquitoes.

Biosecurity South Australia (SA) indicated that the company has been actively involved in diagnostic testing and that it has tested or is currently in the process of testing about 100 affected horses

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