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\section{Results}  \subsection{Infection of \textit{B. dubia} with \textit{F. tularensis} LVS}  To determine if OS cockroach survival was proportional to the number of bacteria present in the infection inoculum, serial dilutions of \textit{F. tularensis} LVS were injected into into the hemocoel of juvenile cockroaches that measured greater than 1.5 cm in length. Infected Following infection,  cockroaches were housed at 37$^{\circ}$C and survival was monitored for over the course of  7 days. The Overall, the  percentage of cockroaches in  each group that survived infection and the rate rates  of death were dose-dependent; no OS dose-dependent. No  cockroaches survived infection with 10^{5} 10^5  CFU of \textit{F. tularensis} LVS and LVS, with  all cockroaches died in this group dead  by day five post-infection; post-infection (Figure 2). In comparison,  60 percent of cockroaches infected with 10^{4} CFU of \textit{F. tularensis} LVS survived through day seven post-infection; post-infection (p=0.0141; compared to 10^5 CFU group)  and 90 percent of cockroaches infected with 10^{3} CFU of \textit{F. tularensis} LVS survived through day seven (Figure post-infection (p<0.001; compared to 10^5 CFU group; Figure  2). Injection of PBS alone did not result in any cockroach  deaths.