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The article provides information on a study on Salmonella enterica serovar Typhimurium (S. typhimurium). It is stated that L-Cysteine is required for the induced antibiotic resistance in actively swarming S. typhimurium. It is noted that the swarm-cell differentiation in the S. typhimurium leads to a biosynthetic mode of growth, despite thriving on a rich medium, and cells that have elevated antibiotic resistance. The study hypothesized that in the cells, the additional cysteine requirement is for use in pathways not directly associated to cell growth. The research suggested that while swarm medium has sufficient cysteine for the growth of S. typhimurium, it does not contain enough for swarm-cell differentiation.