Bacteria can multiply disease-inducing genes to rapidly cause infection

More than 22 years ago, researchers discovered an infection strategy of human pathogenic Yersinia bacteria -- a protein structure in bacterial cell-walls that resembled a syringe. The structure, named "Type III secretion system" or T3SS, makes it possible to transfer bacterial proteins into the host cell and destroy its metabolism. After the discovery, researchers have found T3SS in several other bacteria species and T3SS has proven to be a common infection mechanism that pathogens, i.e. an infectious agent such as a virus or bacterium, use to destroy host cells. Now researchers have found a link between infection and rapid production of the essential proteins needed to form "the poisonous syringe."

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