Table 2. Bacterial generation time under optimal conditions (Mason, 1935)

Bacteria	Generation time (min)
Escherichia coli	12.5
Bacillus thermophilus	16
Vibrio cholerae	21.2
Salmonella paratyphi	23
Shigella dysenteriae	23
Streptococcus lactis	23.5
Staphylococcus aureus	27
Bacillus subtilis	26-32
Bacillus megaterium	31
Clostridium botulinum	35