FIG. 1.
(A) Electron micrograph of murine BMM infected with M. avium (M). Note the tight vacuole containing the bacterium (double arrows). Magnification, ×19,800. (B) Electron micrograph of murine BMM infected with C. burnetii (C). Note the large vacuole (V) occupying almost the entire cytoplasm of the cell and eccentric nucleus (N). Magnification, ×3,300. (C) Electron micrograph at 24 h after coinfection of murine BMM with M. avium and C. burnetii. Note colocalization of the two organisms in the same large vacuole (arrows point to the organisms). Magnification, ×8,300.