Saturday, April 23, 2011

Bacterial Growth Curve

Bacterial growth follows a regular pattern that consists of four (4) phases:

Lag Phase
  • Bacteria exhibits little or no growth.
  • Last only a few hours in room temperature and can be decrease by keeping food out of the temperature danger zone.
Log Phase
  • Bacteria double in numbers in every 15 to 30 minutes.

Stationary Phase
  • Number of bacteria is steady as the new organisms being produced is equal to number of organisms that are die.
Death Phase
  • Bacteria die off rapidly because they lack nutrients and are poisoned by their own wastes.

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