Merck Manual

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Some Primary Immunodeficiency Disorders

Some Primary Immunodeficiency Disorders

Part of the Immune System That Is Affected


Humoral immunity: Problems with B cells (lymphocytes) and their production of antibodies

Cellular immunity: Problems with T cells (lymphocytes)

Combined humoral and cellular immunity: Problems with B and T cells

Phagocytes: Problems with the movement or killing activity of these cells

Complement proteins: Deficiency of complement proteins

C2, C3, C4, C5, C6, C7, C8 and/or C9 deficiency