Brisbane researchers have developed a blood test that can accurately detect one of the most common causes of hay fever, paving the way for new treatments.

The research, by The University of Queensland and Sullivan Nicolaides Pathology, promises relief to the tens of thousands of sufferers who endure the annual misery of sneezing, runny noses and itchy eyes when the pollen count climbs.

Researchers isolated the allergen responsible in Bahia pollen — the Pas n 1 molecule — then developed and trialled the first accurate test.