Predictive Modeling for Listeria monocytogenes as a ... - jifsan

Buchanan three-linear phase
• Buchanan et al. (1997) described bacterial growth in a very
simple three-linear phase model. Lag phase:
• For N t = N o
• Exponential growth phase:
• For N t = N o + µ(t-t LAG )
• Stationary phase:
• For N t = N MAX
• Where N t is the log of the population density at time t ; N o
the log of the initial population density; N MAX the log of the
maximum population density; t the elapsed time; t LAG the
time when the lag phase ends; t MAX the time when the
maximum population density is reached; and µ is the specific
growth rate (log cfu ml -1 h -1 ).