The Gram-negative bacterium Vibrio cholerae (causative agent of cholera) is armed with a nano-speargun, which it uses to combat unwelcome competitors. University of Basel Professor Marek Basler and his colleagues from Switzerland and Germany have now gained insights into the construction, mode of action and recycling of this bacterial weapon. The structure of T6SS during contraction. Image credit: University of Basel, Biozentrum. Vibrio cholerae’s...