This farmer says that he usually has a few cuts or abrasions from his work, but this presentation is new. When it began, it was small, painless, but itchy. It then enlarged into a "blister" and eroded into the finding shown above.
This disease can progress to larger involvement with lymphadenopathy and lymphadenitis as shown below:
Challenge: This began about a week after exposure to what?
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bacillus anthracis?
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yes - anthrax. cutaneous is a lot more common than other systemic forms
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Sorting Wool
This is cutaneous anthrax, sometimes called Woolsorter’s disease because it often occurs from contact with infected animals or animal products.
Source: UpToDate.