Two serotyping schemes (Penner and Laboratory; of Enteric Pathogens [LEP])
based on soluble heat-stable antigens were used to analyze 3,788 Campylobac
ter sp. isolates. A significant percentage (36.6%) was untypeable using LEP
serotyping; greater cross-reaction was also observed. The relative discrim
ination capabilities of the techniques were similar. Penner serotyping fulf
ils more of the requisite criteria for typing methods.