Dr. Alan P. Knutsen cares for children and adults with primary immunodeficiency disorders, as well as children with acquired immunodeficiency diseases, such as HIV. In addition, Dr. Knutsen treats allergic conditions, including asthma, allergic rhinitis, allergic conjunctivitis, food allergy, drug allergy, insect allergy, anaphylaxis, sinusitis and fungal sinusitis.

His research interests include primary immune deficiency disorders, allergic bronchopulmonary aspergillosis (ABPA) and fungal-associated asthma.

Dr. Knutsen is a professor at Saint Louis University School of Medicine in the Department of Pediatrics, Division of Allergy and Immunology, where he also serves as division director.

Dr. Knutsen is the author or coauthor of more than 160 peer-reviewed articles and more than 50 book chapters. He serves on editorial boards for several medical journals.