In this study, the content of SPLUNC1 mRNA in lungs of Bbs was 4.71 times higher than that of Ahs in 4th-dpi group and the content of SPLUNC1 mRNA in lungs of Bbs was 9.72 times higher than that of Ahs in 14th-dpi group, which indicates that the resistance that Bbs possesses to Mo infection may be associated closely with the high expression of SPLUNC1 gene. This evidence concerns the gene AHSG and infection.