7. Rickettsia

Question 0

RMSF treatment

Answer 0

doxy 5-7d, minimum 3d after fever
chloramphenicol for pregnant
sulfonamides may worsen illness

Question 1

RMSF

Answer 1

rickettsia ricketsiae,

east - dermacentor, west - d andersonii, texas, mexico - rhipicephalus sanguineous (brown dog tick)

Question 2

mediterranean spotted fever

vector

unique clinical - lymph?, eschar?

Answer 2

boutonneuse fever

rickettsia canorii

brown dog tick, rhipicephalus sanguineus

single inoculation eschar, no lymphadenopathy

Question 3

african tick bite fever

Answer 3

rickettsia africae

amblyomma variegatum/amblyomma hebraeum

eschar common, regional LAD

Question 4

American tick bite fever

Answer 4

rickettsia parkeri rickettsiosis

gulf coast tick - Amblyomma maculatum

inoculation eschar

Question 5

rickettsial pox

Answer 5

rickettsia akari

vector -house mouse mite ( liponyssoides sanguineus)
reservoir - house mouse (mus musculus)

eschar is hallmark, but then diffuse eruption follows.

Question 6

rickettsiosis

Answer 6

rickettsia phillipi

pacific coast tick, dermacentor occidentalis

single eschar, headache prior to eschar

Question 7

typhus group?

Answer 7

endemic

murine

scrub

Question 8

epidemic typhus

Answer 8

rickettsia prowazekii

body louse, pediculus humanus (reservoir human), southern flying squarrel - less severe disease

sudden high fever; headache, limb pain, vomiting, skin findings after 3 days. can be hemorrhagic

Question 9

trench fever

Answer 9

bartonell quintana

human body louse

Question 10

endemic typhus (murine typhus)

Answer 10

rickettsia typhi

rat flea Xenopsylla cheopsis (reservoir rats)

mild clinical disease, subtle macular lesions on trunk, can progress to purpuric lesions

texas? r felis, cat flea(cat, opossum)

Question 11

Scrub typhus (japanese river fever)

Answer 11

orientia tsutsugbamushi

chiggers (larval trombiculid mites)

fever, generalized lymphadenopathy, 1/2 w/ eschar

Question 12

ehrlichoisis

Answer 12

ehrichia

amblyomma americanum (lone star tick), vector: white tail deer

leukopenia, thrombocytopenia

Question 13

human granocytotrophic anaplasmosis

Answer 13

anaplasma phagocytophilium

ixodes(co infection w/ lyme possible), deer

vasculitis not observed in ehrlichiosis, hga; rash also less common

Question 14

STARI

Answer 14

amblyomma americanum. lone star tick

rash similar to erythema chronicum migrans

Question 15

Q fever

Answer 15

coxiella burnetii

cattle, camels

no skin manifestation