We report Rickettsia parkeri and Candidatus Rickettsia andeanae in ticks of the Amblyomma maculatum group collected from dogs in Sonora, Mexico. Molecular characterization of these bacteria was accomplished by DNA amplification and sequence analysis of portions of the rickettsial genes gltA, htrA, ompA, and ompB.
Keywords: Candidatus Rickettsia andeanae; Mexico; Rickettsia parkeri; bacteria; rickettsia; spotted fever group rickettsiae; ticks; vector-borne infections.