Immunodeficiency
Immunodeficiency refers to conditions in which the immune system does not function optimally, resulting in increased susceptibility to infections. These conditions may be primary (due to an underlying immune system defect) or secondary to other medical conditions or treatments.
Symptoms and presentation
Patients with immunodeficiency often present with recurrent, severe or unusually persistent infections. These may include recurrent sinus infections, chest infections, pneumonia, ear infections, or infections that require repeated or prolonged courses of antibiotics. Some patients may experience infections that are more severe than expected, occur at an unusually young age, or are caused by uncommon organisms. Others may have a history of poor response to standard treatments or slow recovery from infections. In some cases, immunodeficiency may be suspected due to abnormal blood test results, such as low immunoglobulin levels or impaired vaccine antibody responses.
Causes of immunodeficiency
Immunodeficiency may be primary, where there is an intrinsic problem with immune system development or function, or secondary, where immune function is affected by other factors such as medications, chronic disease or medical treatments. Primary immunodeficiency disorders include a range of conditions affecting antibody production, cellular immunity or combined immune pathways. One of the more recognised conditions in this group is common variable immunodeficiency (CVID), although there are many other forms. Secondary immunodeficiency may occur in association with medications, chronic illness or other systemic conditions that affect immune function.
Specialist assessment
At Queensland Allergy & Immunology Clinic, we provide comprehensive evaluation of suspected immunodeficiency. Assessment begins with a detailed clinical history focusing on infection frequency, severity, type and response to treatment. Targeted immunology investigations may be arranged depending on the clinical scenario. These may include immunoglobulin levels, vaccine antibody responses, lymphocyte subsets and other specialised immune function testing. The aim of assessment is to determine whether immune function is within normal limits or whether further investigation and treatment is required.
Management of immunodeficiency
Management depends on the underlying diagnosis and severity of immune dysfunction. This may include infection prevention strategies, vaccination optimisation, long-term monitoring, or in selected cases immunoglobulin replacement therapy. Where immunodeficiency is confirmed or strongly suspected, ongoing specialist follow-up is often required to monitor infection burden, immune function and treatment response over time.
Queensland Allergy & Immunology Clinic is a specialist allergy and clinical immunology clinic based in Birtinya on the Sunshine Coast, providing expert care for patients across the wider Sunshine Coast region including Kawana, Caloundra, Buderim, Maroochydore, Mooloolaba, Sippy Downs, Coolum, Noosa, Brisbane North, and surrounding areas. We provide both in-person consultations in Birtinya and telehealth appointments across Queensland, with short wait times for specialist allergy and immunology care.