Correlative light, electron, and ion microscopy (CLEIM) offers huge potential to track the intracellular fate of antibiotics, with organelle-level resolution. However, a correlative approach that enables subcellular antibiotic visualisation in pathogen-infected tissue is lacking. Here, Fearns et al. developed correlative light, electron, and ion microscopy in tissue (CLEIMiT) and used it to identify the cell type-specific accumulation of an antibiotic in lung lesions of mice infected with Mycobacterium tuberculosis. Using CLEIMiT, the authors found that the anti-tuberculosis drug bedaquiline is localised not only in foamy macrophages in the lungs during infection but also accumulates in polymorphonuclear cells. The image shows a photomontage in four different pseudo-colors of micro-computed tomography of whole lung from a mouse aerosol-infected with Mycobacterium tuberculosis.
Image Credit: Antony Fearns and Angela Rodgers
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