No fresh cases of equine infectious anaemia have emerged in Britain since two animals were diagnosed with the notifiable virual disease a fortnight ago.
The disease, also known as swamp fever, was detected in two horses in Wiltshire who were imported from Romania through Belgium.
Britain's Department for Environment, Food and Rural Affairs (Defra), in a report to the World Organisation for Animal Health dated January 29, said there had been no fresh cases.
The two infected animals were euthanized on January 20 because of the risk of spreading the disease.
It can be transmitted by the exchange of blood by biting insects. However, the risk from insects spreading it in the depths of the British winter are considered low.
Horses who had contact with the infected animals are undergoing regular testing for the disease.
The infected horses were detected as part of routine post-import testing.
The disease was lasted detected in Britain in 1976.