[WORLD SCIENTIFIC Proceedings of the II International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2007) - University of Seville, Spain (28 November – 1 December 2007)] Current Research Topics in Applied Microbiology and Microbial Biotechnology - The analysis on different SigB concentration in Staphylococcus aureus : ∼High SigB accumulation enhances biofilm formation∼