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. 2004 Apr 29;38(3):398–404. doi: 10.1016/0014-4800(83)90079-5

Leptomeningitis and polycaryocyte formation in the CNS of rats inoculated subcutaneously with Herpes simplex virus

DH Percy 1,3, KA Galil 2, LA Hatch 1
PMCID: PMC7130222  PMID: 6852211

Abstract

Wistar rats were inoculated subcutaneously with either type 1 (HSV1) or type 2 (HSV2) Herpes simplex virus at 5 days of age. Animals were killed in extremis or at the end of the 14-day observation period postinoculation. Acute destructive meningoencephalitis with hemorrhage and leukocytic infiltration was observed in both groups. Polycaryocytes comprised of cells of the internal granular layer of the cerebellum were observed in some animals inoculated with HSV1. These multinucleated cells appeared to be formed by fusion of virus-infected cells, and intranuclear inclusion bodies were observed. Lesions in the leptomeninges were particularly striking in animals inoculated with HSV2. Viral replication in resident cells of the leptomeninges was demonstrated by electron microscopy.

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