Genetic relationship between 88 S. suis serotype 2 isolates as estimated by clustering analysis of RAPD patterns obtained with three primers. The tree was generated by the unweighted pair group method with arithmetic means. The geographic origin, the host health status, and the phenotype regarding hemolysin, MRP, and EF are indicated for each strain. ∗, related proteins with a higher-molecular-mass form; s, MRP-like protein with a lower molecular mass.