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

Authors
  • Zhou, Kang
  • Gui, Meng
  • Li, Pinglan
  • Xing, Shaohua
  • Cui, Tingting
  • Peng, Zhaohui
Type
Published Article
Journal
Brazilian Journal of Microbiology
Publisher
Elsevier
Publication Date
Oct 01, 2012
Volume
43
Issue
4
Pages
1365–1375
Identifiers
DOI: 10.1590/S1517-838220120004000018
PMID: 24031965
Source
Medline
Keywords
License
Unknown

Abstract

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 °C) 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 r(2), 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.

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