A new study from researchers at the University of Ottawa shows honey to be effective in killing bacteria that cause chronic sinusitis [which] affects millions of people every year. In chronic sinusitis, the mucous membranes in the sinus cavities become inflamed, causing headaches, stuffy nose, and difficulty breathing. Though it can be caused by allergies, chronic sinusitis can also be caused by bacteria that colonize in the nose and sinuses. That's where honey may help. Researchers, led by Tala Alandejani, MD, at the University of Ottawa, tested two honeys, manuka and sidr. [They] singled out three particularly nasty bacteria: two strains of staph bacteria ... and one called Pseudomonas aeriginosa. The two types of honey were effective in killing the bacteria. Even bacteria growing in a biofilm, a thin, slimy layer formed by bacteria that affords resistance to antibiotics, were susceptible to honey. The researchers also found that the two types of honey worked significantly better than an antibiotic against [the staph bacterias]. Scientists hope the results can help lead to a new treatment for people with chronic sinusitis.