BioMed Research International / 2015 / Article / Tab 3 / Research Article
Comparison of Primary Models to Predict Microbial Growth by the Plate Count and Absorbance Methods Table 3 Growth parameters and their 95% confidence limits and coefficients of determination (
), SSE, and RMSE of fit obtained with different growth models for the average OD growth curves of
Listeria monocytogenes CECT 4031 at 37°C in TSB+YE inoculating 10
2 , 10
4 , and 10
6 CFU mL
−1 shown in Figure
1(b) .
Growth model Initial concentration (CFU mL−1 ) Lag time (h) Growth rate (OD units h−1 ) (OD units) (OD units)SSE RMSE Three-phase linear 102 19.11 (18.96–19.27) 0.163 (0.154–0.173) 0.142 (0.069–0.214) 0.742 0.994 0.0013 0.0127 104 14.61 (14.42–14.81) 0.173 (0.159–0.187) 0.143 (0.065–0.222) 0.724 0.989 0.0026 0.0181 106 8.79 (8.23–9.35) 0.150 (0.126–0.174) 0.149 (0.072–0.227) 0.712 0.930 0.0490 0.0614 Gompertz 102 18.99 (18.87–19.10) 0.169 (0.161–0.177) 0.132 (0.128–0.136) 0.784 (0.776–0.792) 0.998 0.0221 0.0153 104 14.46 (14.31–14.62) 0.179 (0.167–0.191) 0.133 (0.127–0.139) 0.757 (0.746–0.768) 0.997 0.0353 0.0204 106 9.33 (9.09–9.56) 0.218 (0.190–0.245) 0.141 (0.129–0.154) 0.755 (0.726–0.783) 0.990 0.0491 0.0320 Logistic 102 19.06 (18.99–19.12) 0.168 (0.163–0.171) 0.128 (0.126–0.130) 0.779 (0.775–0.783) 0.999 0.0052 0.0074 104 14.55 (14.43–14.67) 0.178 (0.170–0.186) 0.128 (0.123–0.132) 0.755 (0.748–0.762) 0.999 0.0160 0.0137 106 9.40 (9.22–9.58) 0.217 (0.199–0.235) 0.135 (0.126–0.144) 0.747 (0.730–0.765) 0.996 0.0227 0.0218 Richards 102 19.12 (19.05–19.19) 0.183 (0.175–0.191) 0.126 (0.124–0.128) 0.778 (0.774–0.781) 1.333 (1.152–1.514) 0.999 0.0045 0.0069 104 14.74 (14.61–14.87) 0.219 (0.205–0.233) 0.123 (0.119–0.128) 0.754 (0.748–0.760) 2.040 (1.565–2.515) 0.999 0.0123 0.0121 106 9.93 (9.81–10.06) 0.318 (0.303–0.333) 0.119 (0.115–0.123) 0.748 (0.742–0.754) 6.730 (4.925–8.536) 0.999 0.0028 0.0078 Baranyi 102 18.79 (18.65–18.93) 0.148 (0.142–0.155) 0.120 0.781 (0.776–0.786) 0.998 0.0138 104 14.04 (13.87–14.21) 0.163 (0.153–0.173) 0.130 0.745 (0.739–0.752) 0.997 0.0178 106 8.95 (8.75–9.15) 0.201 (0.183–0.218) 0.139 0.731 (0.718–0.743) 0.995 0.0219