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Body weight changes after an i.v. injection of various doses of live E. coli (experiment 2). ●, low dose ([2.5 ± 0.3] × 108); ○, medium dose ([6.8 ± 0.9] × 108); □, high dose ([2.0 ± 5] × 108). With the high dose, only one rat survived until day 4.
