Tic spotted fever

Question 1

Etiology/ vector

Answer 1

Boutonneuse fever R.conorii.
Siberian tick typhus 
R.sibirica,
Australian tick typhus
R.autralis,
oriental spotted fever
R.japonica,
Arican tickbite fever
 R.a ricae,etc.

Question 2

Transmission vector

Answer 2

Dermatocentor andersoni/variablis (American dog tick), 
Amblyomma american-num (lone startick),
Rhipicephalus sanguineus(Brown dog tick)
,Ixodesholocyclus/tasmani.
Worldwide
distribution. Attachment often unnoticed

Question 3

Inoculation

Answer 3

Bite;

contact vector feces with open wound

Question 4

Incubation period

Answer 4

Average 7days after tick bite.

Question 5

Manifestation

Answer 5

Onset sudden of symptoms in 50% of patients.
Most common:Headache, fever; also chills, myalgias, arthralgias, malaise, or anorexia.
Tâche noire at inoculation site.
An inoculation eschar:papule forms at the bite site and evolves to a painless, black-crusted ulcer with
red halo in 3 to 7 days. Occurs in all spotted fevers except RMSF.

Question 6

Exanthem

Answer 6

About 3 to 4 days a er appearance o tâchenoire,anerythematousmaculesand papules appear on trunk; may subsequently disseminate,involving ace,extremities, andthepalmsorsoles.Densityo eruption heightensduringnext ewdays.Inseverecases, lesions may become hemorrhagic

Question 7

Distribution

Answer 7

trunk,extremities, face (centriugal)—except RMSF, which

first appears at wrists and ankles and spreads centripetally.