Infected mice were imaged weekly from 6 weeks postinfection to detect the emission of bioluminescence. Images were captured using the Lumina XRS series III in vitro imaging system (IVIS; PerkinElmer, MA, USA) and Living Image Software v3.2 with the following settings: field of view, 24; relative aperture, f’1.2; medium binning; and 60-s exposure. Bioluminescence was calculated using the Living Image Software v3.2.
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