Vitreoscilla filiformis (Vf) (ATCC15551) used in this study is a non-photosynthetic, non-fruiting gliding bacteria as defined according to the classification of Bergey's (1989). This filamentous bacterium belongs to the order of Beggiatoales. It is a micro-organism found in sodic sulphuretted thermal springs recognized for their local anti-pruriginous and anti-inflammatory properties.