Effect of combined function of temperature and water activity on the growth of Vibrio harveyi

Brazilian Journal of Microbiology

Kang Zhou²  Meng Gui¹  Pinglan Li¹  Shaohua Xing¹  Tingting Cui¹  Zhaohui Peng¹ 

[1] ,Sichuan Agricultural University College of Food Science Yaan,China

关键词: Vibrio harveyi;    modelling;    temperature;    water activity;   

DOI  :  10.1590/S1517-83822012000400018

来源: SciELO

【 摘 要 】

Vibrio harveyi is considered as a causative agent of the systemic disease, vibriosis, which occurs in many biological fields. The effects of temperatures (12.9-27.1 ºC) and water activity (NaCl% 0.6%-3.4%) on V. harveyi were investigated. The behavior and growth characteristics of V. harveyi was studied and modeled. Growth curves were fitted by using Gompertz and Baranyi models, and the Baranyi model showed a better fittness. Then, the maximum growth rates (µmax) and lag phase durations (LPD, λ) obtained from both Gompertz and Baranyi model were modeled as a combination function of temperature and water activity using the response surface and Arrhenius-Davey models for secondary model. The value of r², MSE, bias and accuracy factor suggest Baranyi model has better fitness than Gompertz model. Furthermore, validation of the developed models with independent data from ComBase also shown better interrelationship between observed and predicted growth parameter when using Baranyi model.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License