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Colony forming units (CFUs) from cultured spleen homogenates (a) or peritoneal lavage fluid (b) either 24h or 48h following a peripheral E. coli injection in young and old rats. No differences were found between young and old rats in spleen homogenates. However, young rats showed elevated CFUs in the peritoneal lavage fluid at 24h compared to old rats. However, this difference was no longer significant at 48h. * = p < .05. Error bars indicate ± SEM.
