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Primary immunodeficiency challenging to diagnose

Symptoms can mimic those of other conditions, says UCI Health allergist

uci health allergist and immunologist dr yesim demirdag wearing a white coat in front of a blue studio background
Dr. Yesim Yilmaz Demirdag, an immunologist and allergist with UCI Health.

IN THE NEWS: Those with one of the hundreds of types of primary immunodeficiency (PI) have a weakened immune system, making them more prone to illness and infection.

Health central logo blue background HC lettersDiagnosing PI is tricky because its symptoms often mimic those of other conditions.

Dr. Yesim Yilmaz Demirdag, an immunologist and allergist with UCI Health, spoke with HealthCentral about how physicians approach it.

“Your doctor will likely first ask you questions that relate to your infection history. They can include the types of infections you get — for example, sinus infections or pneumonia) — and how often and how many courses of antibiotics you need in a year to treat them.”

“They will also ask you questions about your family history, including autoimmune disease or chronic inflammatory conditions, both of which are connected to PI risk.”

Blood tests are also important, she notes.

Demirdag specializes in the diagnosis and treatment of immunodeficiencies in children and adults, as well as asthma, food allergies and eczema in children. Her clinical interests include hives, swelling, rhinitis, sinusitis, drug allergies, eosinophilic esophagitis and stinging insect allergies.

Her research interests include the genetics of primary immune deficiencies, immune deficiencies in chromosomal abnormalities, eczema and food allergies.

Demirdag is an associate professor and director of the Allergy and Immunology Fellowship Program at the UC Irvine School of Medicine.

She sees patients at UCI Health Allergy and Immunology Services. Make an appointment by calling 949-824-8600.

About UCI Health

UCI Health is one of California’s largest academic health systems and the clinical enterprise of the University of California, Irvine. Established on July 1, 1976, UCI Health has grown into a 1,461-bed health system that includes UCI Health — Orange, UCI Health — Irvine, four Community Network hospitals and a growing network of ambulatory care centers across Orange and Los Angeles counties. As Orange County’s only academic health systems, UCI Health is home to the only National Cancer Institute-designated comprehensive cancer center based in the county, the region’s only American College of Surgeons-verified Level I adult and Level II pediatric trauma center, American College of Emergency Physicians Gold Level 1 Geriatric Emergency Department and a nationally recognized regional burn center verified by the American Burn Association. Powered by UC Irvine, UCI Health serves 5.6 million people across Orange County, western Riverside County and southeast Los Angeles County through excellence in patient care, research and medical education. Follow UCI Health on Facebook, Instagram, LinkedIn and X.