FIG 3.

B. anthracis (CFU/mg tissue) in the spleen and lung of mice following rEnvD or PBS administration by the intravenous route (n = 7 to 10; values are means ± 1 standard deviation). PBS controls were culled when the clinical score reached threshold levels as the animals were then close to death (13). Tissues were weighed and homogenized in sterile water, the homogenates were serially diluted in sterile water and plated onto Trypticase soy agar, and the plates were incubated at 37°C for 16 to 24 h.