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Laser scanning confocal microscopy of Rickettsia helvetica AS819-infected L929 cells five days (A) and ten days (B) after infection. F-actin was stained with Alexa Fluor 568 Phalloidin (red), α-tubulin appears green (Alexa Fluor 488), nuclei were stained with DAPI (blue), and rickettsiae are coloured yellow (magnification 40x). The bar indicates 50 μm.
