| genotypic and antigenic identification of two new strains of spotted fever group rickettsiae isolated from china. | four isolates of spotted fever group rickettsiae isolated from ticks in china were compared with all known species and strains of spotted fever group rickettsiae by immunofluorescence assay, dna polymerase chain reaction followed by restriction endonuclease fragment length polymorphism analysis, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and western immunoblot. the chinese isolates belonged to three types, including a novel serotype which has not been described before. one isolat ... | 1993 | 8093253 |