Hendra Test results due today
The initial test results for more than 30 horses at risk of contracting the Hendra virus will be known by Thursday afternoon.
A horse on a central Queensland stud died from the Hendra virus on Saturday and two previous horse deaths on that property are being investigated as possible Hendra cases.
Another horse at J4S Equine Nursery in Cawarral, east of Rockhampton, has since fallen sick.
A Queensland Primary Industries and Fisheries spokesman said the results of blood tests taken from 25 horses remaining on the property and another 11 that were on the property but had since been moved to their eight home properties would be known by late Thursday afternoon.
He said all horses that were on the property and were at risk of being infected have been traced and the owners have been instructed to isolate the horses.
Horses being held in isolation on properties outside of central Queensland include one on the Sunshine Coast, one on the Darling Downs and one in northern NSW.
A second round of testing will occur several weeks after initial tests.
Meanwhile, Queensland Health is offering anti-viral treatment to four people who came into close contact with the Anglo filly that died from the virus.
Treatment involves a five-day intravenous course of Ribavirin, a drug normally used in the treatment of chronic hepatitis.
It is being provided at the Rockhampton Base Hospital.
Symptoms usually appear within five to 16 days of contact with infected horses.
The bat-borne virus can pass from horses and from horses to humans but health authorities say there is no record of human-to-human transmission.
A Hendra outbreak in August last year killed Brisbane vet Ben Cunneen, the first person in Australia to die of the disease in 10 years.