| detection of a typhus group rickettsia in amblyomma ticks in the state of nuevo leon, mexico. | the state of nuevo leon, mexico has had outbreaks of typhus group rickettsiosis, most recently recognized in 1997. evaluation of the sera of 345 patients with a dengue-like illness revealed that 25.5% had antibodies reactive with typhus group rickettsiae and 16% had antibodies to rickettsia parkeri. rickettsiae were detected by pcr and shell-vial isolations in the field-collected amblyomma ticks. molecular characterization by dna sequence analysis of the glta, ompb, and 17-kda gene identified th ... | 2005 | 16481535 |