Histological lesions in the CNS <*> were mild
caused by oral or intranasal inoculation of the virus
Histological lesions in the CNS caused by oral or intranasal inoculation of the virus were mild compared with those induced by intravenous infection .
Histological lesions in the CNS caused by oral or intranasal inoculation of the virus were mild compared with those induced by intravenous infection .