Recurrent Neisseria infections due to factor D deficiency

Recurrent Neisseria infections due to factor D deficiency is a rare, genetic, primary immunodeficiency disorder characterized by an increased susceptibility to <i> Neisseria </i> bacterial infections, resulting from complement factor D deficiency, typically manifesting as recurrent respiratory infections, recurrent meningitis and/or septicemia. Patients typically present fever, purpuric rash, arthralgia, myalgia and undetectable complement factor D plasma concentrations.