Muscle Weakness and Fatigue in a Woman With Recurrent Upper Respiratory and Urinary Tract Infections

History of Present Illness The patient had been admitted to an outlying facility for complications stemming from an upper respiratory infection (URI) beginning 3 weeks previously, for which a course of oral antibiotics was prescribed. In addition, the patient complained of symptoms attributable to a previously diagnosed urinary tract infection (UTI), which had since recurred. Multiple therapeutic modalities, including administration of steroids, intravenous immunoglobulin (IVIG), cyclophosphamide (Cytoxan), and plasmapheresis were implemented; however, her anemia and respiratory status worsened and progressed to multisystem organ failure.