7. Rickettsia Flashcards
RMSF treatment
doxy 5-7d, minimum 3d after fever
chloramphenicol for pregnant
sulfonamides may worsen illness
RMSF
rickettsia ricketsiae,
east - dermacentor, west - d andersonii, texas, mexico - rhipicephalus sanguineous (brown dog tick)
mediterranean spotted fever
vector
unique clinical - lymph?, eschar?
boutonneuse fever
rickettsia canorii
brown dog tick, rhipicephalus sanguineus
single inoculation eschar, no lymphadenopathy
african tick bite fever
rickettsia africae
amblyomma variegatum/amblyomma hebraeum
eschar common, regional LAD
American tick bite fever
rickettsia parkeri rickettsiosis
gulf coast tick - Amblyomma maculatum
inoculation eschar
rickettsial pox
rickettsia akari
vector -house mouse mite ( liponyssoides sanguineus)
reservoir - house mouse (mus musculus)
eschar is hallmark, but then diffuse eruption follows.
rickettsiosis
rickettsia phillipi
pacific coast tick, dermacentor occidentalis
single eschar, headache prior to eschar
typhus group?
endemic
murine
scrub
epidemic typhus
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
trench fever
bartonell quintana
human body louse
endemic typhus (murine typhus)
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)
Scrub typhus (japanese river fever)
orientia tsutsugbamushi
chiggers (larval trombiculid mites)
fever, generalized lymphadenopathy, 1/2 w/ eschar
ehrlichoisis
ehrichia
amblyomma americanum (lone star tick), vector: white tail deer
leukopenia, thrombocytopenia
human granocytotrophic anaplasmosis
anaplasma phagocytophilium
ixodes(co infection w/ lyme possible), deer
vasculitis not observed in ehrlichiosis, hga; rash also less common
STARI
amblyomma americanum. lone star tick
rash similar to erythema chronicum migrans
