From sticks to balls: The shape of bacteria is evolving to better adapt to the throat

It's no coincidence that the earthworm's slender shape makes it perfect for weaving through narrow tunnels. Evolution moulds the shapes of living creatures according to the benefits they offer. At the microscopic level, do the various shapes of bacteria also contribute to their survival? Does a spherical bacterium (coccus) have a better chance of infecting its host than its stick-shaped neighbour (bacillus)?

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