Demonstration of spotted fever group rickettsiae in the tache noire of a healthy person in Sicily

S. Mansueto, G. Tringali, R. Di Leo, M. Maniscalco, M. R. Montenegro, D. H. Walker

Research output: Contribution to journalArticle

11 Scopus citations


A human case of rickettsial infection occurred in Sicily following tick bite. The patient did not have fever, the typical nodular rash, or other symptoms of illness other than development of a tache noire containing spotted fever group rickettsiae which were demonstrated by immunofluorescence. A high titer of antibodies of the IgG class suggests that the patient may have had previous exposure to Rickettsia conorii, or a related spotted fever group rickettsia. An anamnestic response may be hypothesized to have conferred partial immunity, with resulting containment of rickettsiae at the site of inoculation.

Original languageEnglish (US)
Pages (from-to)479-482
Number of pages4
JournalAmerican Journal of Tropical Medicine and Hygiene
Issue number3
StatePublished - Jan 1 1984
Externally publishedYes


ASJC Scopus subject areas

  • Parasitology
  • Virology
  • Infectious Diseases

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