Rickettsia amblyommii Labruna et al. 2004 Stothard D.R. Fuerst P.A. Evolutionary analysis of the spotted fever and typhus groups of Rickettsia using 16S rRNA gene sequences 1995 18 1 52 61 Systematic and Applied Microbiology Syst Appl Microbiol 0723-2020 10.1016/S0723-2020(11)80448-0 Host: Amblyomma americanum.