4 new constructive checks for equine flu have been returned in vaccinated thoroughbreds on the Newmarket yard of flat coach Simon Crisford.
Racing is on maintain till at the very least Wednesday whereas the British Horseracing Authority checks horses nationwide.
The suspension got here after the invention on Thursday of six circumstances of equine flu at Donald McCain’s Cheshire secure.
Crisford’s yard was named so “the Newmarket neighborhood is conscious” the place the an infection has been discovered, the BHA mentioned.
The yard is without doubt one of the 174 to be examined as a result of runners from the secure competed on the fixture at Newcastle on 5 February, which had been recognized as a possible danger fixture.
All of the affected horses are contained inside Crisford’s yard, the BHA mentioned.
The BHA is ready to announce when racing can start once more on Monday night.
The Animal Well being Belief (AHT), which is finishing up testing on behalf of the BHA, is working by means of “a number of 1000’s of samples” acquired from yards throughout Britain.
Earlier on Sunday, the BHA reported that round 1,500 samples had been analysed and not using a constructive take a look at.
The authority additionally confirmed that testing had been carried out on the remaining 27 horses from the yard of Rebecca Menzies – the place testing of three suspected circumstances got here again unfavorable on Saturday.
All horses within the yard have examined unfavorable, however it’ll “stay below shut surveillance and additional testing can be carried out”, the authority mentioned.
Equine flu – not in contrast to human flu – is endemic in Britain, the place racehorses are vaccinated towards it. The virus is mostly not considered life-threatening, however limits the aggressive functionality of horses.
An unvaccinated non-thoroughbred horse was put down in Suffolk after growing problems following an outbreak of equine influenza.
In a separate case, 10 unraced two-year-old thoroughbreds in the identical county had been discovered to have contracted the extremely contagious virus.
There have been outbreaks of equine influenza in 9 English counties for the reason that begin of 2019.
One case entails a vaccinated non-thoroughbred horse in stables at a fee-paying faculty within the south west of England.
Cornelius Lysaght, BBC horse racing correspondent
Simply when individuals had been pondering that the sunshine on the finish of the tunnel was getting brighter…
After two days of no constructive take a look at amongst a whole lot of swabs studied by scientists, the sensation was that the resumption of racing this week, perhaps on Wednesday, was very a lot on the playing cards.
However this would seem to jeopardise that hope, for flat racing on the all-weather tracks anyway.
The Crisford operation at Newmarket is flat racing solely, and there is no apparent reference to the McCain string – actually the 2 stables have had no runners on the identical venues of late.