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A US soldier returned from Iraq with a skin lesion on his right upper arm. The lesion was papular then developed into a nodular 4X5 cm crusting with irregular sharp border. Giemsa stain of biopsy showed inclusions with histiocytes. Which is the most likely infecting organism?

A- Leishmania major
B- Strongyloides stercoralis
C- Histoplasma capsulatum
D- Plasmodium vivax
E- Toxoplasma gondii
 
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