Consistent with this, many of the infections noted in the homozygous individuals were caused by catalase-positive pathogens, including a mucous membrane infection by Burkholderia cepacia2, candidal septicemia (Candida albicans18), Legionnaires’ disease (Legionella19), and miliary tuberculosis (Mycobacterium tuberculosis20). The gene discussed is CAT; the disease is Legionnaires' disease.