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Microimmunofluorescence detection of R. rickettsii (Texas red staining) and actin (fluorescein phalloidin staining) in infected human endothelial cells at 72 h after inoculation. (a) Without α-lipoic acid treatment; (b) treatment with 100 μM α-lipoic acid; (c) treatment with 500 μM α-lipoic acid.
