Abstract
Bacterial secreted proteases are the key factors that increase the virulence potential of different pathogens. Extraintestinal pathogenic E. coli (ExPEC) is a distinct pathotype that has unique ability to infect various body sites apart from the gastrointestinal tract causing several life-threatening diseases both in human and animals. Thus, understanding of ExPEC pathogenesis is crucial in effective management of disease caused by these pathogens. It is known that ExPEC possesses a broad spectrum of virulence factors including the secreted proteases which elude the host defence system. Recent studies have shown that high prevalence as well as the action of the secreted proteases influence the pathogenesis of ExPEC. However, literature on the secreted proteases present in ExPEC and their role in promoting virulence of ExPEC is rather limited. This review describes the distribution, characterization and the role of serine and metalloproteases secreted by diverse pathotypes of ExPEC, highlighting the significance of secreted proteases of ExPEC in pathogenesis.
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