Heat‐stable serotyping antigens expressed by strains of Campylobacter jejuni are probably capsular and not long‐chain lipopolysaccharide

Abstract
The role of lipopolysaccharide (LPS) in the serotyping of Campylobacter jejuni based on heat-stable antigens was examined using SDS-PAGE and a silver stain for carbohydrate. None of the 32 type strains of Camp. jejuni expressed long-chain LPS. Rabbit antibodies, prepared to 10 selected strains of Camp. jejuni, reacted with surface-exposed carbohydrate antigens, which were not LPS. This study suggests that the heat-stable antigens of Camp. jejuni, which form the basis for the established Penner serotyping scheme, are probably capsular and not LPS.

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