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15 Cards in this Set
- Front
- Back
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Arbovirus infections
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-About 500 different viruses
-transmitted by insects |
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Arbovirus infections (yellow fever)
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-passed from human to human by
Aedes mosquito -vaccine available |
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Arbovirus infections (Arbovirus encephalitis)
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-10 encephalitic arboviruses; 6 cause disease in US
-Eastern equine encephalitis (EEE)Maintained in horses, wild birds -Western equine encephalitis (WEE)Maintained in horses, wild birds -West Nile virus Maintained in wild birds -California encephalitis Maintained in small mammals -Dengue fever Maintained in humans, monkeys |
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Rickettsial Infections
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-small bacteria that are obligate intracellular parasites
-transmitted by arthropods |
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Rickettsial Infections (Rocky Mountain spotted fever)
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-Caused by Rickettsia rickettsii; vector =
Dermacentor tick |
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Rickettsial Infections (Rickettsialpox)
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-Caused by R. akari; vector = mite
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Rickettsial Infections (Endemic typhus)
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-Caused by R. typhi; vector = rat flea
-Spread to vasc endothelium in heart, skin, kidney, CNS, muscle |
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Borrelia Infections (Epidemic relapsing fever)
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-Caused by Borrelia recurrentis
-spirochete -transmission by body louse |
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Borrelia Infections (Endemic relapsing fever)
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-Caused by Borrelia recurrentis
-spread by soft ticks -Repeated fevers due to antigenic variation in bacteria |
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Borrelia Infections (Lyme disease)
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-Caused by B. burgdorferi
-transmitted by deer tick -target-shaped rash |
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Malaria
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-Caused by sporozoan, Plasmodium
-Vector is Anopheles mosquito; resistant to insecticides -Relapses can occur months or years after infection |
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Schistosomiasis
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-Schistosoma mansoni blood fluke
-Vector is freshwater snail |
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Leishmaniasis
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-Leishmania donovani sporozoan
-Sandfly is vector |
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African sleeping sickness
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-Trypanosoma brucei gambiense (W. African) and T.b.
rhodesiense (E. African); flagellate -Vector is tsetse fly -Rapid mutation in glycoprotein coat gives waves of infection |
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American sleeping sickness; also called Chagas
disease |
-Trypanosoma cruzi
-Vector is reduviid bugs (kissing bugs); organism shed in bug feces |
