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1UnitÉ des Rickettsies, FacultÉ de MÉdecine, 27, Boulevard Jean Moulin, 13385 Marseille, France
2Institut Central des Hôpitaux Valaisans, Microbiologie Clinique, 1950 Sion Switzerland
4Institut de Zoologie, UniversitÉ de Neuchâtel, 2000 Neuchâtel Switzerland
3Rocky Mountain Laboratories, National Institutes of Health, Hamilton, Montana 59840
* Corresponding author.
ABSTRACT
We propose the name Rickettsia helvetica sp. nov. for a rickettsial serotype of unknown pathogenicity isolated in 1979 in Switzerland from Ixodes ricinus ticks and designated the Swiss agent. The growth characteristics and the results of microimmunofluorescence serologic typing, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, Western blotting (immunoblotting) with specific mice sera, and a polymerase chain reaction followed by restriction fragment length polymorphism analysis confirmed previously reported preliminary findings which suggested that this rickettsia, to which a name was given provisionally, does represent a new member of the spotted fever group of rickettsiae. The type strain is C3 (Reference Center for Rickettsioses, Marseille, France).
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