Which type of antibiotics inhibit replication of microorganisms and prevent their growth without killing them?

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Some antibiotics stop bacteria from multiplying rather than killing them directly. This action, called bacteriostatic, means the bacterial population is prevented from growing and replicating, giving the immune system a chance to eliminate the organisms. In contrast, bactericidal drugs actively kill bacteria, reducing the number of viable cells. So the scenario described—hindering replication and growth without outright killing—maps to bacteriostatic agents.