Immunohistochemical staining of CCR7, CCL19 and CCL21 in spleen. Panels show immunostaining of spleen from mice subjected to R. conorii infection. Left panels show staining of spleen from controls. Right panels show spleen from mice infected with lethal doses of R. conorii. Representative images from three mice in each group obtained with 40X objective. Scale bar: 20 μm.