The functional identification of Dps in oxidative stress resistance and virulence of Riemerella anatipestifer CH-1 using a new unmarked gene deletion strategy

•sacB-based markerless gene deletion strategy in Riemerella anatipestifer CH-1.•The dps mutant in stationary phase showed increased sensitivity to H2O2.•Dps prevents H2O2 from damaging cells through iron-binding and DNA-binding activity.•Dps increased the resistance of R. anatipestifer to host clear...

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