| rickettsial diseases in russia. | currently, several rickettsioses are officially being reported in the russian federation. these are epidemic typhus and brill-zinsser disease, both caused by rickettsia prowazekii which has a historic prevalence in russia. nowadays only single sporadic cases of r. prowazekii infection are reported. the last significant outbreak occurred in 1997 in a mental nursing home, where 29 cases were identified. registered morbidity of typhus in russia varies from 0 to 0.01 per thousand for the last decade ... | 2006 | 17114680 |