One of the quarantined horses is seen at the Centennial Parklands Equestrian Centre in Sydney
One of the quarantined horses is seen at the Centennial Parklands Equestrian Centre in Sydney August 25, 2007. Australia's multibillion dollar horseracing industry was in turmoil on Saturday after an outbreak of equine influenza in Sydney triggered a nationwide shutdown on all horse movement.
The unprecedented moves followed confirmation that at least 16 horses had tested positive for equine influenza (EI), a respiratory illness that is rarely fatal but tires horses and is highly contagious. REUTERS/Mick Tsikas (AUSTRALIA)