Figure 3From: Virulence potential of five major pathogenicity islands (SPI-1 to SPI-5) of Salmonella enterica serovar Enteritidis for chickensHeterophil infiltration in caeca of chickens infected with different SPI mutants of S . Enteritidis. Y axis, average number of heterophils per microscopic view ± SD. a, b, c - ANOVA test different at p < 0.05 in comparison to the group infected with the wild-type S. Enteritidis (a), the ΔSPI1-5 mutant (b), or the non-infected controls (c). Abbreviations: as in Fig. 1.Back to article page