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Lung sections from SCID mice 28 days post infection. Lung sections were stained with haematoxylin and eosin (H&E) (a-c) (Magnification ×20). Ziehl-Neelsen staining detected for the presence of acid fast bacilli (AFB) in the lungs of the three groups of infected SCID mice (d-f) (Magnification ×1000).
