Volume 17, Number 12—December 2011
Lineage and Virulence of Streptococcus suis Serotype 2 Isolates from North America
|ST||No. strains||Presence of factor-encoding gene
†ST, sequence type; SLY, suilysin; MRP, muraminidase-released protein; ND, no amplification of the mrp gene was detected by PCR under the conditions used; EF, extracellular factor.
‡Variants of the mrp gene are those described by Silva et al. (20).
§Hemolysis of horse erythrocytes by the strains was considered to be an indication of the expression of SLY.
¶Molecular mass MRP variants identified by Western blotting were in agreement with those expected on the basis of the mrp gene variant identified by PCR.