Fig. 2From: Disseminated mycobacterium genavense infection with central nervous system involvement in an HIV patient: a case report and literature reviewPathology sections of bone marrow biopsy specimen; Low magnification of bone marrow biopsy shows replacement of hematopoietic elements by numerous foamy macrophages (circled area) arranged in sheet (H&E section, x40 & x100). Higher magnification reveals histiocytes (circled area) containing abundant organisms (H&E section x400). Frequent positive acid-fast bacilli (white arrows) were present in foamy macrophages on Ziehl-Nielsen stain (x400)Back to article page