A Weil-Felix test was performed on serial dilutions from a patient bitten by a tick.The results obtained were positive for OX-19 and negative for OX-2 and OX-K.Based on these findings,the organism can be identified as:
A)R.rickettsii.
B)O.tsutsugamushi.
C)Rickettsia prowazekii.
D)Rickettsia typhi.

Question

Quizplus · Accepted Answer

Patients with R.prowazekii (epidemic typhus),R.typhi (murine typhus),and R.rickettsii (Rocky Mountain spotted fever)will be positive for OX-19 and negative for OX-2 and OX-K.However,R.prowazekii is transmitted via lice,and R.typhi is transmitted via fleas.R.rickettsii is transmitted via ticks.O.tsutsugamushi (scrub typhus)will be positive for OX-K and negative for OX-19 and OX-2 and is transmitted by chiggers.

A Weil-Felix Test Was Performed on Serial Dilutions from a Patient