Figure 2.

Contribution of SPI1 to the colonization of chicken cecum (A) and spleen (B) by Typhimurium. Competitive indexes are from mixed oral infections in chickens with the wild type and the Δspi1 (deletion of SPI1) strains. Each point represents an organ from an individual bird at the indicated day following the infection. The table summarizes the number of animals sampled (n), the geometric mean of the competitive indexes (mean CI), and the P value from a two-tailed T-test.

Dieye et al. BMC Microbiology 2009 9:3   doi:10.1186/1471-2180-9-3
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