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Survival of rats in the pneumonia model post-challenge with different titers of A. baumannii strain 307-0294. Rats were challenged with 7.0 × 106 (n = 18), 5.8 × 107 (n = 19), 3.5 × 108 (n = 19), 4.3 × 108 (n = 18), and 7.7 × 109 (n = 18) CFU of 307-0294 by intratracheal instillation, and survival was recorded. There was a trend for increased survival in rats challenged with 7.0 × 106 and 5.8 × 107 CFU compared to rats challenged with 7.7 × 109 CFU (&, P = 0.03).
