Dairy Science & Technology

, Volume 91, Issue 3, pp 361–372

Effect of milk temperature and flow on the adherence of Staphylococcus epidermidis to stainless steel in amounts capable of biofilm formation

  • Zoran Jaglic
  • Dana Cervinkova
  • Elleni Michu
  • Martina Holasova
  • Petr Roubal
  • Hana Vlkova
  • Vladimir Babak
  • Jarmila Schlegelova
Original Paper

DOI: 10.1007/s13594-011-0017-6

Cite this article as:
Jaglic, Z., Cervinkova, D., Michu, E. et al. Dairy Science & Technol. (2011) 91: 361. doi:10.1007/s13594-011-0017-6
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Abstract

The adherence of microorganisms to surfaces is a critical precondition for biofilm development. In this study, we evaluated the adherence (in amounts capable of biofilm formation) of Staphylococcus epidermidis in milk to stainless steel. During a 6-h time frame, the effect of milk temperature and laminar flow on adherence was analysed. In amounts capable of biofilm formation, the cells adhered within 0.5 h; however, at the milk temperatures promoting cell growth (25 and 28 °C), the cells proceeded to detach from the surface when bacteria started to grow (after 2 h), but only during the milk flow. When the temperatures were below the growth limit (6 and 22 °C) or under static conditions, the cells remained attached during the whole monitoring period. This study showed that temperatures which are suboptimal for growth and static conditions support the adhesion S. epidermidis in amounts capable of biofilm formation. On the contrary, at temperatures allowing the growth, adhered cells of S. epidermidis can easily be washed away from the stainless steel surface when bacteria begin to grow.

Keywords

Food safety Hygiene Dairy Attachment Detachment 

温度和流速对表皮葡萄球菌在不锈钢表面上的粘附以及对生物膜形成的影响

摘要 微生物在表面上粘合是形成生物膜的前提。本文研究了表皮葡萄球菌在不锈钢表面上的粘附作用 (也就是形成生物膜的量)。分析了乳在板框中停留 6h 内乳的温度和层流速度对粘附作用的影响。在 0.5h 内就能发生了细胞粘附和形成生物膜, 然而随着温度升高到 25°C 和 28°C, 微生物的生长速度加快, 2h 后由于细菌的大量繁殖使得细胞随着流动的奶开始从表面上脱附下来。但是当乳的温度低于微生物的生长限 (6°C 和 22°C) 或者是在静态条件下, 在整个检测时间内, 细胞粘附于表面。研究结果表明在不利于微生物生长的温度和静态条件下会导致表皮葡萄球菌的粘附和形成生物膜, 相反, 在有利于微生物生长的温度下, 微生物的大量繁殖则使得粘附的细胞很容易从不锈钢表面上脱附下来。

关键词

食品安全 卫生学 吸附 脱附 

Copyright information

© INRA and Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Zoran Jaglic
    • 1
  • Dana Cervinkova
    • 1
  • Elleni Michu
    • 1
  • Martina Holasova
    • 1
  • Petr Roubal
    • 2
  • Hana Vlkova
    • 1
  • Vladimir Babak
    • 1
  • Jarmila Schlegelova
    • 1
  1. 1.Veterinary Research InstituteBrnoCzech Republic
  2. 2.MILCOM a.s., Dairy Research InstitutePragueCzech Republic