Patients with primary hypogammaglobulinemia, such as X-linked agammaglobulinemia and common variable immunodeficiency, have recurrent infections, predominantly of the respiratory and intestinal tract (1–2). Most respiratory infections in these patients are caused by Haemophilus influenzae and Streptococcus pneumoniae and, without proper treatment, may lead to severe pneumonia, bronchiectasis, decreased pulmonary function, and death (1, 3–6). Recurrent Giardia lamblia infections may result in chronic diarrhea, whereas chronic Campylobacter jejuni infections may cause recurrent bacteremia and cellulitis (1, 3–4, 7–8). In patients with X-linked agammaglobulinemia, persistent enterovirus infections, notably those caused by echovirus, are associated with chronic meningoencephalitis (3, 6).