Insect bite hypersensitivity (IBH) associated with Culicoides biting midges is the most common allergic skin disease in
horses, seriously reducing welfare of affected horses. The main symptom is severe pruritus, with risk of self-infected
open wounds. The choice for treatment and prevention of this common distressing disease remains a major challenge
for the veterinary profession and horse owners, as there is little evidence-based research for disease management.
While the understanding of the disease at a genetic and immunological level has improved in recent years, studies on
how IBH affects animal welfare and the behaviour of affected animals are lacking, and the welfare of affected animals
would benefit greatly from scientifically-based guidelines for improved prophylaxis and treatment. The aims of this
project are to investigate the effect of IBH in animal welfare and behaviour and to examine the effect of repellent
collars in the prevention of symptoms in IBH susceptible horses.