Question | Answer |
Rickettsia | gram negative obligate intracellular
Transmitted via arthropods
HA, Fever, Doxycycline |
Epidemic typhus | Rickettsia prowazekii
Flying squirrels
Rash moves from trunk to extremities |
Endemic typhus | Rickettsia typhi
Rats and fleas |
RMSF | Rickettsia rickettsii
Rash starts at extremities
Rash involves palms/soles |
Scrub typhus | Orientia tsutsugamushi
Chiggers
No rash |
Q fever | Coxiella burneti
No vector (cattle placenta or tick feces) |
Ehrlichiosis | Deer and tick
Fever, HA, but no rash |
Anaplasmosis | Anaplasma phagocytophila
Ixodes tick
Inclusion bodies in neuts |
Cat scratch fever | Bartonella henselae
Self-limiting
Tx = doxycycline |
Bacillary angiomatosis | B. henselae and quintana
Confused with Kaposi's
Tx = macrolides |
Rabies (bug description) | Family rhabdoviridae
Enveloped, negative RNA virus |
Rabies (clinical) | fever, malaise, agitation, photophbia, hydrophbia, paralysis, coma, death |
Rabies reservoirs/vectors | skunk, raccoon, bat, foxes |
Hantavirus syndromes | Hantavirus fever with renal syndrome (HFRS)
Hantavirus pulmonary syndrome |
Arenaviruses | Enveloped negative sense RNA
Similar to hantavirus |
Filoviridae | Ebola and Marburg
ss negative RNA
Fruit bats |
Henipaviruses | Hendra and Nipah viruses
Systemic vasculitis |
Colorado tick fever virus | Reoviridae coltivirus
Similar to WNV in presentation |
Yellow fever | Flaviviridae flavivirus
Humans are hosts
Jaundice, hemorrhagic symptoms, shock |
Chikungunya virus | Togaviridae alphavirus
Humans can be hosts
Arthritis, myositis, synovitis |
West Nile virus | Flaviviridae flavivirus |
Dengue | Flaviviridae flavivirus |
What arboviruses have humans as hosts? | Dengue, Yellow fever, Chikungunya, alphaviruses |