Pathogenesis of a model gammaherpesvirus in a natural host.
Murine gammaherpesvirus 68 (MHV-68) infection of laboratory mice (Mus musculus) is an established model of gammaherpesvirus pathogenesis. The fact that M. musculus is not a host in the wild prompted us to reassess MHV-68 infection in wood mice (Apodemus sylvaticus), a natural host. Here, we report significant differences in MHV-68 infection in the two species: (i) following intranasal inoculation, MHV-68 replicated in the lungs of wood mice to levels approximately 3 log units lower than in BALB/c mice; (ii) in BALB/c mice, virus replication in alveolar epithelial cells was accompanied by a diffuse, T-cell-dominated interstitial pneumonitis, whereas in wood mice it was restricted to focal granulomatous infiltrations; (iii) within wood mice, latently infected lymphocytes were abundant in inducible bronchus-associated lymphoid tissue that was not apparent in BALB/c mice; (iv) splenic latency was established in both species, but well-delineated secondary follicles with germinal centers were present in wood mice, while only poorly delineated follicles were seen in BALB/c mice; and, perhaps as a consequence, (v) production of neutralizing antibody was significantly higher in wood mice. These differences highlight the value of this animal model in the study of MHV-68 pathogenesis.
School of Infection and Host Defence, The University of Liverpool, Duncan Building, Daulby Street, Liverpool L69 3GA, United Kingdom.
David J
DJ
Hughes
Anja
A
Kipar
Jeffery T
JT
Sample
James P
JP
Stewart
D000818:Animals; D057134:Antibodies, Neutralizing / Q000097:blood; D000914:Antibodies, Viral / Q000097:blood; D001980:Bronchi / Q000821:virology; D005260:Female; D006099:Granuloma / Q000473:pathology / Q000821:virology; D006566:Herpesviridae Infections / Q000473:pathology / Q000662:veterinary* / Q000821:virology; D008168:Lung / Q000473:pathology / Q000821:virology; D017563:Lung Diseases, Interstitial / Q000821:virology; D008221:Lymphoid Tissue / Q000821:virology; D051379:Mice; D008807:Mice, Inbred BALB C; D051189:Murinae / Q000821:virology*; D018144:Rhadinovirus / Q000472:pathogenicity*; D013154:Spleen / Q000473:pathology / Q000821:virology; D014412:Tumor Virus Infections / Q000473:pathology / Q000662:veterinary* / Q000821:virology
D057134:Antibodies, Neutralizing; D000914:Antibodies, Viral