PMC3892657_01
Computed tomography-scan of the chest shows a cavitary lesion in the right upper lobe.
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F1
A chest computed tomography (CT) done on hospital day 3, showed a right upper lobe cavitary lesion (Figure 1).
Papanicolaou stain of the bronchial washing reveals the elongated bacilli (arrow). Magnification 400x.
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F2
The bronchial washing cytology examination did not reveal malignant cells, but it showed scattered elongated bacilli (Figure 2).
Gram stain of the sputum culture shows Leptotrichia sp. Magnification 400x.
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F3
The Gram-negative bacillus was eventually identified as LS at the North Dakota State Laboratory (Figure 3).