Genotypic identification of seven Rickettsia conorii strains.

Restriction endonuclease fragment length polymorphism (RFLP) analysis and polymerase chain reaction (PCR) were used to characterize the genotypic diversity of 7 strains of Rickettsia conorii from South Africa, Ethiopia, Morocco, India and Russia. The strains of R. conorii were divided into four genotypes by Rsa I or Pst I endonuclease digestion of PCR-amplified rickettsial DNA using primers derived from the R.

[Isolation and identification of the W-88 strain of spotted fever group rickettsiae from a human case in Tongliao City, Inner Mongolia].

One strain of spotted fever group (SFG) rickettsiae was isolated from a patient with febrile and headache who was missdiagnosed as common cold. The rickettsia was isolated by inoculation of yolk sacs of embryonated hen eggs with the patient's blood. The isolate was named as W-88 following the initial letter of the patient's name.