reference stock culturestock culture microbiology
stock culture preparation
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stock culture ppt

Guidelines and standards outline how reference stock cultures must be processed and stored. Working Stock Cultures: A working stock culture is growth derived 1. Periodic transfer to fresh media i. Strains can be maintained by periodically preparing a fresh stock culture from the previous stock culture. To provide a stock culture maintenance protocol and relevant regulatory requirements for quality control organisms. Background. Quality control organisms are a Whatever the size of the laboratory 's stock culture collection, it is important that it is properly maintained. Traditionally this has been a matter of Some cultures have to be maintained in continuous culture Distribution, Initial culture. Culture received. Seed stock. Distribution stock. culture from the previous stock culture. The culture medium, the storage temperature, and the time interval at which the transfers.