Dr. Thomas Johnson practices Allergy and Immunology care in Ocala, FL and in The Villages, FL. Dr. Johnson specializes in the diagnosis and treatment of asthma as well as a wide variety of allergic conditions, including environmental allergies, insect allergies, food allergies, penicillin and caine allergies, allergic conjunctivitis, eosinophilic esophagitis, and contact dermatitis. He performs specialized testing and procedures, including spirometry, patch testing, food challenges, penicillin and local anesthetic skin testing and aspirin desensitizations.