List labs provide research reagents related to bacteria and their ability to infect. These reagents are important in understanding disease and in providing tools to manipulate living systems. Purified reagents have been used to sort out the mechanisms of bacterial disease by understanding how the virulence factors made by replicating pathogens alter the host. Knowledge of virulence factors is critical to design novel approaches for therapeutics or vaccines. There are many examples of how bacterial research reagents provide both an understanding of disease and tools to counter disease and manipulate living systems. High purity reagents from List Labs are key to research.