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Metabolism of Klebsiella pneumoniae freeze‐dried cultures for the design of BOD bioassays

Aims:  The survival rate of freeze‐dried cultures is not enough information for technological applications of micro‐organisms. There could be serious metabolic/structural damage in the survivors, leading to a delay time that can jeopardize the design of a rapid biochemical oxygen demand (BOD) metabolic‐based bioassay. Therefore, we will study the metabolic activity (as ferricyanide reduction activity) and the survival rate (as colony‐forming units, CFU) of different Klebsiella pneumoniae freeze‐dried cultures looking for stable metabolic conditions after 35 days of storage.