KLK4 and Yersinia infectious disease: These genes were mainly involved in the “bacterial secretion system”, “protein secretion”, “biofilm formation—V. cholerae”, “biofilm formation—Pseudomonas aeruginosa”, and “quorum sensing and Yersinia infection.” These differential genes were associated with target genes for the pstS gene to participate in the regulation of V. alginolyticus virulence.