Rickettsia and Chlamydia
Among spotted fever group of rickettsial infections: (AIIMS Nov 2012)
|A||All are transmitted by ticks|
|B||Ticks usually die after passing over the infection|
|C||Rickettsial pox is self-limited|
|D||In rocky mountain spotted fever rash starts from neck|
|E||All are true|
a. All members of spotted fever are transmitted by hard ticks except R. akari, which is transmitted by gamasid mite.
b. Ticks usually have transovarial infection therefore acts as vectors as well as reservoirs of infection and are not killed by the infection.
c. Rickettsial pox is a least severe variety.
d. Rash in RMSF begins at the extremities and subsequently spreads to the trunk.