Posted on by Dr. Francis Collins
If you or a loved one has ever struggled with a bacterial infection that seemed to have gone away with antibiotic treatment, but then came back again, you’ll probably be interested to learn about the work of Kyle Allison. What sometimes happens when a person has an infection—for instance, a staph infection of the skin—is that antibiotics kill off the vast majority of bacteria, but a small fraction remain alive. After antibiotic treatment ends, those lurking bacterial “persisters” begin to multiply, and the person develops a chronic infection that may be very difficult and costly to eliminate.
Unlike antibiotic-resistant superbugs, bacterial persisters don’t possess any specific genetic mutations that protect them against the killing power of one particular medication or another. Rather, the survival of these bacteria depends upon their ability to enter a dormant state that allows them to hang on in the face of antibiotic treatment. It isn’t clear exactly how the bugs do it, and that’s where Kyle’s work comes in.