Under normal conditions (without bacterial infection), we found that when miR-7 was overexpressed or AjPAK1 was silenced, the content of LZM in coelomic fluid increased significantly (P < 0.01), while when the expression of miR-7 was inhibited, the content of LZM in coelomic fluid decreased significantly (P < 0.01) (Figure 5A). Here, LYZ is linked to bacterial infectious disease.