Term
| Describe of unique unique features of the Rickettsia group of bacteria. |
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Definition
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Term
| Describe the epidemiology, clinical manifestations, and mode of transmission of the spotted fever group of Rickettsia and the typhus group of Rickettsia. |
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Definition
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Term
| Describe the general features, epidemiology, and clinical manifestations of the diseases associated with Bartonella henselae. |
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Definition
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Term
| What is the vector of Rickettsia and Bartonella? |
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Definition
| arthropod vectors with humans being an accidental host. |
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Term
| are these bacteria or viruses? |
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Definition
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Term
| where is the only place they grow in a host? |
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Definition
| ONLY cytoplasm of eukaryotic cells |
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Term
| how does rickettsia get into the cytoplasm of a eukayote? |
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Definition
| they escape the phagosome (via phospholipase). |
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Term
| can you grow rickettsia on an agar plate? |
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Definition
| NO. Only inside living host cells. |
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Term
| what bug causes Rocky Mountain Spotted Fever (RMSF)? |
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Definition
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Term
| how high is the mortality rate of Rocky Mountain Spotted Fever if untreated? |
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Definition
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Term
| what is the main vector of RMSF in the eastern USA? |
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Definition
| the dog tick. (it is a parasite of various species of ticks) |
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Term
| what area of the USA does the wood tick transmit RMSF? |
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Definition
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Term
| what are the chances a tick is infected with the bacterium? |
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Definition
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Term
| what diagnostic feature do you see on the palms/wrists and soles/ankles of some with RMSF? |
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Definition
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Term
| what is transovarial transmission? |
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Definition
| babies of an infeced arthropod are infected too. |
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Term
| what is the minimum exposure time to an infected tick for transmission to occur? |
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Definition
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Term
| what is meant by "petechial"? |
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Definition
| erythmatous macules caused by bleeding underneath the skin. |
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Term
| why is mortality rate higher in people with dark skin? |
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Definition
| they cant see the red spots. |
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Term
| what bug causes Louse-Borne Typhus Epidemic Fever? |
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Definition
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Term
| how is this disease transmitted? |
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Definition
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Term
| where does the rash start? |
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Definition
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Term
| how does the the Louse-Borne Typhus Epidemic Fever start? |
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Definition
| Epidemic typhus starts with the feeding of the body louse on a patient with an acute febrile infection. |
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Term
| what is the causative agent of Cat Scratch Fever? |
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Definition
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Term
| what is the vector for B. henselae? |
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Definition
| transmitted cat to cat by fleas. (up to 25K cases/year) |
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