Lymphadenitis caused by infection with an isoniazid- and rifampin-resistant strain of Mycobacterium bovis BCG in an infant with IFN-γ/IL-12 pathway defect / Linfadenite por Mycobacterium bovis BCG resistente a isoniazida e rifampicina em lactente com defeito no eixo IFN-γ/IL-12