[Effects of intravenous and intraperitoneal routes on <i>Babesia microti</i> infections and splenic immune cells in BALB/c mice].

Both intraperitoneal and intravenous routes are effective to induce <i>B. microti</i> infections in BALB/c mice, and the prevalence of <i>B. microti</i> infections is higher in BALB/c mice through the intraperitoneal route than through the intravenous route. Intraperitoneal and intravenous injections with <i>B. microti</i> cause diverse spleen morphologies and proportions of splenic immune cells in mice, indicating routes of <i>B. microti</i> infections cause different impacts on immune response mechanisms in mice.