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Name the genus and species of each of these. A 12-year-old girl became ill with chills,...

Name the genus and species of each of these.


  1. A 12-year-old girl became ill with chills, headache, and fever (104 F) that lasted three days. After the fever subsided, the girl felt completely well, but twelve days later, she had a febrile episode of two days' duration. Seven days later, she consulted a local physician; physical examination was normal, and no therapy was instituted. The next day her temperature rose briefly to 104 F. She had another episode seven days later and returned to her physician. Loosely coiled spirochetes were noted on a peripheral blood smear taken while she was febrile, and she was placed on tetracycline therapy. The patient and her parents had visited several western National Parks. They had stayed in an old wooden cabin on the North Rim of the Grand Canyon. The girl and her father carried firewood into the cabin, but they noticed no ticks and gave no history of tick bites.

What is the microbe?

The microbe is:


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Answer #1

Ans: The microbe is Borrelia recurrentis. A bacterium associated with spirochaete and nown to cause relapsing fever.

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