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Chronic Granulomatous Disease – CGD
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CGD is often diagnosed in childhood. This condition results in phagocytes (a type of white blood cell) being unable to effectively kill bacteria and fungi.
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Recurrent and sometimes severe infections, including skin infections, pneumonia, abscesses in organs, and swollen lymph nodes.
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Cell Deficiencies (e.g., Selective IgA Deficiency, X-linked Agammaglobulinemia):
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This can manifest at any age, depending on the specific deficiency. Characterized by insufficient or absent antibody (immunoglobulin) production by B cells.
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Increased susceptibility to infections, particularly respiratory and gastrointestinal infections. In Selective IgA Deficiency, many individuals may be asymptomatic, whereas X-linked Agammaglobulinemia primarily affects males and results in very low antibody levels, leading to recurrent bacterial infections from infancy.
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Severe Combined Immunodeficiencies (SCIDs):
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This is present from birth and are life-threatening. Involve a deficiency of crucial immune cells, both T cells and often B cells.
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Common Symptoms:
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Highly susceptible to severe and opportunistic infections from bacteria, viruses, and fungi, often beginning within the first few months of life. Additional symptoms may include poor growth and developmental delays.