FIG. 1.

Sequence comparison of the Szp5058 N terminus with corresponding regions of Szp proteins from three S. equi subsp. zooepidemicus strains. The inverted arrow indicates the predicted signal sequence cleavage site. Shaded segments represent shared identity among at least three of the four proteins. The entire deduced Szp5058 sequence shown was identical to the deduced Szp sequence from strains SS1215 (England PSGN outbreak strain) and SS189 (guinea pig isolate) (Table 1). The bold segment of Szp5058 (Brazil PSGN outbreak strain) indicates a region identical to that deduced from a partial szp gene sequence obtained from a horse pleuritic fluid isolate (GenBank accession no. AF021907). The bold segment of Szp1345 (bovine mastitis isolate) indicates a region identical to that deduced from a partial szp gene from a horse nasal aspirate (GenBank accession no. AF021907).