Neurotropism of swine haemagglutinating encephalomyelitis virus (coronavirus) in mice depending upon host age and route of infection

N. Hirano, Ryuji Nomura, T. Tawara, K. Tohyama

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Mice aged 1, 4 or 8 weeks were inoculated with haemagglutinating encephalomyelitis virus (HEV), strain 67N, by the intracerebral (i.e.), intranasal (i.n.), intraperitoneal (i.p.), subcutaneous (s.c.), intravenous (i.v.) or oral route, with different doses. In 1-week-old mice, mortality and mean time to death were mostly the same regardless of the inoculation route, except for the oral route, which appeared to be the least effective. The virus killed 4-week-old mice readily by all routes of inoculation except the oral, and 8-week-old mice by i.e., i.n. or s.c. inoculation. In descending order of efficacy, the routes of HEV infection were: i.e., i.n., s.c., i.p., i.v. and oral. To follow the spread of HEV from peripheral nerves to the central nervous system (CNS), the virus was inoculated subcutaneously into the right hind leg of 4-week-old mice. The virus was first detected in the spinal cord on day 2, and in the brain on day 3. The brain litres became higher than those of the spinal cord, reaching a maximum of 107PFU/0.2 g when the animals were showing CNS signs. Viral antigen was first detected immunohistochemically in the lumbar spinal cord and the dorsal root ganglion ipsilateral to the inoculated leg; it was detected later in the pyramidal cells of the hippocampus and cerebral cortex, and in the Purkinje cells of the cerebellum but not in the ependymal cells, choroid plexus cells or other glial cells. The infected neurons showed no cytopathological changes.

Original languageEnglish
Pages (from-to)58-65
Number of pages8
JournalJournal of Comparative Pathology
Volume130
Issue number1
DOIs
Publication statusPublished - 01-01-2004

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Encephalomyelitis
Coronavirus
Coronavirinae
encephalitis
Swine
Viruses
Spinal Cord
viruses
swine
mice
Infection
spinal cord
infection
mouth
Leg
Central Nervous System
central nervous system
legs
Choroid Plexus
cells

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • veterinary(all)

Cite this

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Neurotropism of swine haemagglutinating encephalomyelitis virus (coronavirus) in mice depending upon host age and route of infection. / Hirano, N.; Nomura, Ryuji; Tawara, T.; Tohyama, K.

In: Journal of Comparative Pathology, Vol. 130, No. 1, 01.01.2004, p. 58-65.

Research output: Contribution to journalArticle

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