HOPE is on the horizon for horse owners whose animals suffer from sweet itch.

The condition is a seasonal problem that causes immense distress to horse and owner alike. The problem is caused by an allergic reaction to the saliva of the culicoides midge bites. In turn, the horse starts itching, which results in sores and hair loss (due to the constant rubbing).

But a vaccine is being researched which could help relieve - if not cure - this condition. Currently, the symptoms are managed by over-the-counter products, special rugs and, in extreme cases, anti-inflammatory drugs.

Last year, a control group of horses known to have the condition were given a new drug. Although the testing took place later in the season than intended, early results show that it still helped significantly, relieving the symptoms and in some cases stopping them entirely. The delay in the testing, caused by regulations, meant that the study was incomplete, however, and that prevention of the condition could not be investigated.

This year, the trial will continue, but this time starting before the usual sweet itch season and continuing through to the end. The study hopes to gain information about prevention of the condition, as well as treatment.

Dr Alex Morrow, of the department of veterinary clinical studies at Edinburgh University, said: "If successful, this could revolutionise the treatment of sweet itch and other allergic reactions in the horse."

More information on this condition is available from the National Sweet Itch Helpline on (01352) 771718, by e-mail on horses@sweet-itch.com or by visiting the website at www.sweet-itch.com.

Updated: 10:16 Wednesday, February 25, 2004