FIG. 3.

Replication of Cko^green and Vko^green in thymus and intestinal Peyer's patches. Visualization of infection in Peyer's patches or thymus in a typical infection of hosts inoculated with Cko^green (A to C and G to I) or Vko^green (D to F and J to L). (A and D) Photographs of the peritoneal cavity. (G and J) Photographs of the thymus, which contours an outlined white line. (B, E, H, and K) Same organs as above, but photographed after GFP fluorescence excitation. (C, F, I, and L) Microscopic analysis of the same tissues as the second-row panels.