Pathogenic mycobacteria, such as Mycobacterium tuberculosis , Mycobacterium avium subsp. hominissuis (MAH), and Mycobacterium intracellulare , cause pulmonary infections as intracellular parasites of lung macrophages and epithelial cells. Here, using histopathological examinations we found that MAH and M. intracellulare colocalized with erythrocytes in lung infection sites.