STICKY, A NOVEL PHENOTYPE OF CAMPYLOBACTER-RECTUS

A new group of clinical isolates of Campylobacter rectus has been isol ated, which in liquid culture form a biofilm on the walls of glass and polystyrene culture vessels, yet are highly motile when removed as cl umps or single cells from the substratum. A free-swimming variant of s uch a sticky variant has been selected. However, no differences (other than behavioural) were detected between sticky and free-swimming form s by Western immunoblotting with various patient sera or by enzyme act ivity tests. Both expressed a dominant protein of c. 150 kDa, a major component of the S-layer, which is lost in many laboratory lines of C, rectus. Alteration between sessile and motile growth modes may expand the habitat range of this proposed periodontopathogen.