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Phagocytosis and bacterial proliferation in macrophages in 6 hpi germ-free zebrafish after brain ventricle injection with L. monocytogenes EGDe. (A): Injection site at low magnification; (B): High magnification of the injection site (red area) showing recruitment of macrophages (white arrows) to the brain ventricle in response to bacterial infection; (C–F): GFP-expressing bacteria were engulfed by macrophages.
