As most bacteria evolve to a less deatly version of itself to promote spreading, why hasn’t TB evolved to a more harmless bacteria? It’s so old, so there was plenty of time. Killing the host seems pointless in a evolutionary sense.
Thanks!
In: Biology
Your premise is false. Most bacteria *don’t* evolve to a less harmful version. That is an evolutionary path that occasionally happens, when the context suits it to be a favorable mutation. Other bacteria evolve to become *more* harmful; but the vast majority of the time, bacteria evolution makes it neither less nor more harmful to its hosts or its environment.
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