scientificamerican.com - Bacterial 'superbugs' are getting ever more potent. Tuberculosis (TB) strains in Russia carry mutations that not only make them resistant to antibiotics but also help them to spread more effectively, according to an analysis of 1,000 genomes from different TB isolates — one of the largest whole-genome study of a single bacterial species so far. TB, which is caused by the bacterium Mycobacterium tuberculosis , exploded in Russia and other former Soviet nations in the early 1990s, after the collapse of the Soviet Union and its health system.
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