Figure 2.

Growth kinetics of SFGR and TGR in insect, tick, and mammalian cells. Various cultured cells were infected with SFGR alone or TGR alone, and the yield of rickettsiae was monitored. Some of the infected cultures were superinfected with TG or SFGR, respectively, on day three of infection, and the growth of each Rickettsia species was monitored.