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Which of the following lesions/conditions is not caused by virus?

 # Which of the following lesions/conditions is not caused by virus?
A. Koplik’s spots
B. Herpetiform ulcers
C. Herpes labialis
D. Ramsay-Hunt syndrome



The correct answer is B. Herpetiform ulcers.

Koplik's spots are seen in the buccal mucosa in patients with measles, which is an infection caused by paramyxovirus. Herpes labialis is caused by the herpes simplex virus and Ramsay-Hunt syndrome is due to herpes zoster of the geniculate ganglion. Herpetiform ulcers are a type of aphthous ulcer and are not caused by a virus. Lyme disease is caused by Borrelia burgdorferi, a spirochaetal bacterium, and is spread via ticks. 

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