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Information Journal Paper

Title

THE EFFECTS OF TEMPERATURE AND PH ON GROWTH BEHAVIOR OF STREPTOCOCCUS INIAE

Pages

  113-125

Abstract

 The knowledge of PHysiology of microorganisms such as bacterial pathogens and their growth behavior under various environmental conditions assist not only the prevention and control of bacterial diseases but also help to recognize the optimum condition for producing of their biological productions e.g vaccines. In this study the effect of TEMPERATURE and PH was assessed on growth behavior of Streptococcus iniae the causative agent of Streptococcosis in fish. The experiments were runned at TEMPERATURE 25°C, 30°C, 35°C and PH 5.5, 7 and 8.5. The obtained linear regression showed that the highest growth rate occurred at 35°C and PH 7 as well as at 30°C and PH 5.5 and 8.5, while the lowest growth rate was obtained at 25°C and PH 5.5. Statisticaly the effect of PH on bacterial growth was more effective than TEMPERATURE. Significant differences were seen in the growth behaviour of the bacterium at different TEMPERATURE provided in PH 5.5 (P<0.05). These results showed that with in 24 h growth, the maximum production of live cell was 1.3´109 cfuml-1 and the bacterial biomass was 1.08 g/l. Inaddition lactate production reached in 1.87 g/l and the lowest remaining of glucose was 0.0018 g/l. The glucouse coefficient was 0.438 g.g-1 and the highest specific growth rate at the exponential stage was 0.35 h-1. Also, the shortest generation time of the bacterium was 1.88 h. These findings suggest that under closed condition the highest growth rate S. iniae can occurred for at 30°C and initial PH 8.5.

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  • Cite

    APA: Copy

    SOLTANI, M., SALEHI, F., MIRZARGAR, S., & AMOABEDINY, GH.. (2016). THE EFFECTS OF TEMPERATURE AND PH ON GROWTH BEHAVIOR OF STREPTOCOCCUS INIAE. JOURNAL OF VETERINARY MICROBIOLOGY, 12(1 (32) ), 113-125. SID. https://sid.ir/paper/152096/en

    Vancouver: Copy

    SOLTANI M., SALEHI F., MIRZARGAR S., AMOABEDINY GH.. THE EFFECTS OF TEMPERATURE AND PH ON GROWTH BEHAVIOR OF STREPTOCOCCUS INIAE. JOURNAL OF VETERINARY MICROBIOLOGY[Internet]. 2016;12(1 (32) ):113-125. Available from: https://sid.ir/paper/152096/en

    IEEE: Copy

    M. SOLTANI, F. SALEHI, S. MIRZARGAR, and GH. AMOABEDINY, “THE EFFECTS OF TEMPERATURE AND PH ON GROWTH BEHAVIOR OF STREPTOCOCCUS INIAE,” JOURNAL OF VETERINARY MICROBIOLOGY, vol. 12, no. 1 (32) , pp. 113–125, 2016, [Online]. Available: https://sid.ir/paper/152096/en

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