Fig 5. Intracellular acid-fast bacteria within discrete granulomas in Mtb-HT infected mice.
In contrast to the diffuse lung pathology present in Mtb-LT infected mice, granulomas in Mtb-HT infected mice are compact aggregates of macrophages with few intracellular bacteria surrounded by lymphocytes. A fraction of these compact lesions expand and develop necrotic "caseous" centers in Mtb-HT infected mice which erode into the walls of adjacent intact airways, allowing high rates of transmission. Verma et al.
Image Credit: Durbin, J., Verma S. and Salgame, P. (2019)
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