GM2A and infection: In a study on the oral RHE model, SAP1 and SAP3 were initially expressed, followed by SAP6, and finally SAP2 and SAP8 during the late phase of infection [50]; in the vaginal RHE model, the initial expression of the SAP2, SAP10, and SAP9 genes was followed by the appearance of the SAP1, SAP4 and SAP5 transcripts, and finally the expression of SAP6 and SAP7 [49].