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Old 08-02-2011
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Question Tick bite and erythrocytes arranged in a tetrad structure

A 27-year-old man complains of fevers and fatigue following a recent camping trip. He reports having to remove a tick from his leg. A blood smear reveals erythrocytes arranged in a tetrad structure. However, when he doesn't respond well to atovaquone and azithromycin, what's the appropriate next step in treating his illness?

A. Clindamycin and quinine
B. Clindamycin
C. Malarone
D. Quinine
E. None of the above
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Old 08-02-2011
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the pt suffering frm babesia n if the regimen doesnt work then may b E
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Old 08-03-2011
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Default answer

The correct answer is A.
The patient has babesiosis, caused by a protozoa found within erythrocytes, and transmitted by the Ixodes tick. Symptoms include fever, hemolytic anemia, and hemoglobinuria. Blood smear reveals a characteristic "Maltese cross" or tetrad formation. Most people infected with Babesia experience mild-to-moderate disease and can be successfully treated with a combination of atovaquone and azithromycin, administered for 7 to 10 days. However, when patients do not respond well to atovaquone and azithromycin—or in cases of severe disease—clindamycin and quinine should be substituted for atovaquone and azithromycin. (Tip: Quinine is often used, sometimes in conjunction with other agents, to treat infectious organisms that reside within erythrocytes.)
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Old 08-03-2011
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Quote:
Originally Posted by ricko335 View Post
The correct answer is A.
The patient has babesiosis, caused by a protozoa found within erythrocytes, and transmitted by the Ixodes tick. Symptoms include fever, hemolytic anemia, and hemoglobinuria. Blood smear reveals a characteristic "Maltese cross" or tetrad formation. Most people infected with Babesia experience mild-to-moderate disease and can be successfully treated with a combination of atovaquone and azithromycin, administered for 7 to 10 days. However, when patients do not respond well to atovaquone and azithromycin—or in cases of severe disease—clindamycin and quinine should be substituted for atovaquone and azithromycin. (Tip: Quinine is often used, sometimes in conjunction with other agents, to treat infectious organisms that reside within erythrocytes.)
hey i came across on wikipedia tht atovaquone n azithromycin is the new treatment the older one is clindamycin n quinine n in resistant cases u go thru hemodialysis to reduce the virus load .. must check..sorry dnt ve time to post it here
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Old 09-19-2011
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it s babesiosis ,biten by ixodes tick, so ans s A. CINDAMYCI N QUININE .,
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