 microarray slide were probed with the sera from mice infected with *R. heilongjiangensis* (*R. hei*), *R. sibirica* (*R. sib*), *R. rickettsii* (*R. ric*), *R. prowazekii* (*R. pro*), *R. typhi* (*R. typ*), *O. tsutsugamushi* (*O. tsu*) or *C. burnetii* (*C. bur*), or 