The phrase "microbial invaders" refers to tiny organisms called microbes that enter our bodies without permission. These invaders can cause infections and make us sick. Full definition
The hallmark of vertebrate immune systems is their ability to «remember» an infection and mount specific attacks against microbial invaders the next time they come knocking. (sciencemag.org)
In people with CGD, phagocytes lack the hydrogen peroxide they need to kill microbial invaders and instead form areas of swollen tissue known as granulomas. (sciencemag.org)
«Perhaps even more exciting are the implications of the study for microbial ecology, since it suggests our unique microbial residents are tuned to the environment of our body — our genetics, diet, and developmental history — in such a way that they stick with us and help to fend off less - friendly microbial invaders over time.» (sciencedaily.com)