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Swarming

It is known that Bacillus subtilis (strain 168) which is generally used in the lab is unable to swarm on a solid surface eg. agar plate. This is because of two reasons which are:

1. Strain 168 is unable to produce bacterial cyclic lipopeptide surfactin. Surfactin is a surfactant which helps in reducing surface tension and aids the bacteria to swarm on a solid or semi solid medium.