Cytoplasmic Inclusions in Neurones of Cercopithecus Monkeys

Abstract

DURING the examination of spinal dorsal root ganglia from a large number of South African vervet monkeys (Cercopithecus aethiops pygerythrus) we have observed that eosinophilic cytoplasmic bodies are usually present in a high proportion of ganglion neurones at all levels of the cord. These bodies may be single or multiple, are commonly round but may appear discoid when seen on edge (Fig. 1) and may have basophilic internal structures (Fig. 2). Inoculation of ganglion suspensions into monkey kidney tissue cultures has not produced changes in these cultures.