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8 Cards in this Set
- Front
- Back
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Primary geographic distribution of Lyme disease? |
Northeastern United States |
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What is the vector? |
tick - Ixodes Scapularis species most common (Robin of Ixodes... robinhood playing in archery competition) |
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Ticks larvae feasts on which animal? How about the adult form? |
Mouse is the reservoir (and host of larvae)-> larvae. Obligatory host is the Deer -> host of adult tick |
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Do humans play an obligatory role? |
no, we are considered incidental or 'dead end' host |
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Do spirochetes gram stain? |
no because they have very thin walls. |
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_________ is the only spirochete that can be visualized under a microscope. The others you cant. |
Borrelia. use wright stain and giemsa stain. Treponema and leptosperia are the other two that you cant see. |
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What are the stages of Borrelia? Hint: progressively more challenging... |
1: characteristic rash - erythema migrans (bulls eye) - usually occurs within a month of tick bite. Also have flu-like illness (fever and chills) 2: Heart block - caused by myocarditis; bilateral facial nerve palsy (idiopathic ones are called bell's palsy) 3: arthritis of large joints (ex: knee) Migratory polyarthritis (swinging straw man); can also have memory difficulty, and confusion caused by subtle encephalopathy. |
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Treatment? |
Doxycycline (unicycle) Ceftriaxone (three axes) - used for more severe and later stages of infection |
