Furthermore, even shielding the virulence roles of short adhesins, virulence test for duck model confirmed that enhancing expression of K1 capsule in autA and autR mutants promoted adaptability during APEC early colonization and septicemia, and this phenomena was consistent with previous study for virulence roles of K1 capsule in APEC/ExPEC infection12, 13, 14, 15. Here, KRT1 is linked to Sepsis.