Test results from  horses stabled adjacent the Ballina racecourse have cleared the horses of  Hendra virus infection.

Samples taken  from 15 horses have today returned negative results for Hendra virus from a  range of tests.

“All quarantine restrictions at the affected stable have now been lifted,” NSW acting chief veterinary  officer, Ian Roth, said.

“The potential human and animal health implications of this disease are so serious that we could not  afford to take any risks in relaxing quarantine and biosecurity measures until  we received this result.”