Hyposensitization therapy with alum-precipitated pyridine extracts in animal dander sensitive patients

Hyposensitization therapy with APP extracts was found to be effective in 80% of 185 patients allergic to animals (96 to cats, 84 to dogs and 5 to horses) with a minimum of reactions (2.5 local and 0.2% constitutional). Lower respiratory symptoms were the most common complaints, followed by nasal, ocular and respiratory, singly or in combination.