This study (i) establishes the nucleotide sequences of genes in 41 strains, (ii) estimates the amount of variation in each one of the four VRs, (iii) establishes a VR type classification scheme for the PorB protein, (iv) identifies the reactivities of most available serotyping MAbs with those strains, and (v) predicts the locations of serotype-defining MAb binding

This study (i) establishes the nucleotide sequences of genes in 41 strains, (ii) estimates the amount of variation in each one of the four VRs, (iii) establishes a VR type classification scheme for the PorB protein, (iv) identifies the reactivities