Furthermore, we tested whether BapA1 or Fap1 mediate the colonization of S. parasanguinis in the presence of P. aeruginosa. Co-infection of Drosophila with FRD1 resulted in a ~2 log increase in the number of FW213 cells recovered compared to a single FW213 infection (Figs 7 and S7). Here, PTPN13 is linked to coinfection.