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Optical microscopy observation of Mycobacterium leprae in the stool specimens of a leprosy patient in Burkina Faso. A) Ziehl-Neelsen staining; B) fluorescence in situ hybridization. No mycobacteria were observed inside the Entamoeba coli cysts (C). Scale bars represent 10 (A), 20 (B), and 20 (C) microns.
