How insects domesticate bacteria to live symbiotically: Symbiotic microbes' origin discovered after man impales hand on branch

How insects domesticate bacteria to live symbiotically: Symbiotic microbes' origin discovered after man impales hand on branch: Two years ago, a 71-year-old Indiana man impaled his hand on a branch after cutting down a dead crab apple tree, causing an infection that led scientists to discover a new bacterium and solve a mystery about how bacteria came to live inside insects.