FIG. 6.
(A) TEM image showing J774A.1 cells labeled with thorium dioxide are shown at 2 h postinfection with viable C. burnetii. Two SCVs of C. burnetii, indicated by small arrows, are visible within unfused vacuoles. Larger arrows indicate lysosomes labeled with thorium. Bar, 500 nm. (B) Thorium dioxide is visible within a vacuole containing an LCV of C. burnetii 6 h after infection. A small arrow indicates C. burnetii, and larger arrows indicate the thorium dioxide label. Bar, 500 nm. (C) Acid phosphatase stain showing lysosomes wrapping around C. burnetii at 4 h postinfection. Bar, 100 nm.