| presence of rickettsia conorii subsp. israelensis, the causative agent of israeli spotted fever, in sicily, italy, ascertained in a retrospective study. | a retrospective analysis by molecular-sequence-based techniques was performed to correctly identify the etiological agent of 24 mediterranean spotted fever cases occurring in western sicily, italy, from 1987 to 2001. restriction analysis of a 632-bp pcr-amplified portion of the ompa gene allowed presumptive identification of five clinical isolates as belonging to rickettsia conorii subsp. israelensis, the etiological agent of israeli spotted fever (isf). the remaining 19 rickettsial isolates wer ... | 2005 | 16333093 |