NO induction by BMDCs following stimulation with R. conorii and LPS. BMDCs from C3H mice and B6 mice were left untreated or treated with R. conorii (MOI of 5), R. conorii plus L-NMMA (1 mM), LPS (100 ng/ml), or LPS plus R. conorii. After 24 h of stimulation, supernatants were collected for measurement of the concentration of NO2−. Data shown are representative of two independent experiments. *, P < 0.01.