title: Modeling and predicting the biofilm formation of Salmonella Virchow with respect to temperature and pH.
abstract: Biofilm formation of Salmonella Virchow was monitored with respect to time at three different temperature (20, 25 and 27.5 °C) and pH (5.2, 5.9 and 6.6) values. As the temperature increased at a constant pH level, biofilm formation decreased while as the pH level increased at a constant temperature, biofilm formation increased. Modified Gompertz equation with high adjusted determination coefficient (Radj(2)) and low mean square error (MSE) values produced reasonable fits for the biofilm formation under all conditions. Parameters of the modified Gompertz equation could be described in terms of temperature and pH by use of a second order polynomial function. In general, as temperature increased maximum biofilm quantity, maximum biofilm formation rate and time of acceleration of biofilm formation decreased; whereas, as pH increased; maximum biofilm quantity, maximum biofilm formation rate and time of acceleration of biofilm formation increased. Two temperature (23 and 26 °C) and pH (5.3 and 6.3) values were used up to 24 h to predict the biofilm formation of S. Virchow. Although the predictions did not perfectly match with the data, reasonable estimates were obtained. In principle, modeling and predicting the biofilm formation of different microorganisms on different surfaces under various conditions could be possible.
authors.affiliation: Biotechnology Institute, Ankara University , 06100 Tandogan, Ankara , Turkey.
authors.forename: M Nima
authors.initials: MN
authors.lastname: Ariafar
authors.affiliation: Tobacco, Tobacco Products and Alcoholic Beverages Market Regulation Board (TAPDK) , Ankara , Turkey.
authors.forename: Sencer
authors.initials: S
authors.lastname: Buzrul
authors.affiliation: Biotechnology Institute, Ankara University , 06100 Tandogan, Ankara , Turkey.
authors.forename: Nefise
authors.initials: N
authors.lastname: Akçelik
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D006863:Hydrogen-Ion Concentration; D008954:Models, Biological; D012475:Salmonella / Q000502:physiology*; D013696:Temperature
keywords: Biofilm; Salmonella Virchow; modeling; pH; temperature