DOG owners are being alerted to a deadly tick-borne disease that has been found in the UK for the first time.

According to reports, one dog has died and several have been taken seriously ill after contracting babesiosis, caused by a parasite carried in the ticks.

There are now fears the disease could spread from the area of Essex where the dogs were walked, despite measures to contain it.

Speaking to the BBC, Clive Swainsbury, a vet at the Forest Veterinary Centre in Harlow, said he had seen some of the four infected dogs.

The parasite leads a host dog's immune system to attack its own blood cells, causing severe anaemia that requires blood transfusion to treat.

Mr Swainsbury warned that the disease will be hard to detect as vets in the UK are not used to it.

At the same time, efforts to contain the spread could be thwarted by wild animals.

He said: "At present we have a very well-defined area.

"The problem in the future is that every female tick will lay a couple of thousand eggs and all those offspring from that disease will also carry the disease.

"As mammals move around they will start spreading the disease. Although you can advise dog walkers not to go there, it's possible that foxes and other animals will transport these ticks."

In a message to dog owners, Harlow Council said the ticks concerned were "extremely rare" in Britain, but urged them to protect their pets with anti-tick treatments and check for the bugs regularly.

The council has also signposted the area thought to contain the ticks.