| national surveillance of spotted fever group rickettsioses in the united states, 2008-2012. | spotted fever group (sfg) rickettsioses are notifiable conditions in the united states caused by the highly pathogenic rickettsia rickettsii and less pathogenic rickettsial species such as rickettsia parkeri and rickettsia sp. 364d. surveillance data from 2008 to 2012 for sfg rickettsioses are summarized. incidence increased from 1.7 cases per million person-years (py) in 2000 to 14.3 cases per million py in 2012. during 2008-2012, cases of sfg rickettsiosis were more frequently reported among m ... | 2016 | 26324732 |