The distribution of toxocara larvae in the central nervous system of the mouse

The distribution of T. canis and T. cati larvae in the brains of experimentally infected mice were examined. Larvae were found within the brains of all mice infected with the former species, whereas, they were present in only 8·3% of those infected with the latter. The larvae of T. canis showed a predilection for the cerebellum, more per unit weight of tissue being found in this region than in either the cerebral hemispheres or the brain-stem. A few mice also contained larvae within the spinal cord. The incidence of eye involvement was 4·5%.