期刊
VIRUS RESEARCH
卷 160, 期 1-2, 页码 108-119出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.virusres.2011.05.021
关键词
Hantavirus; Puumala virus; Animal model; Persistent infection; Hamster
类别
资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology
- Japanese Ministry of Health, Labour and Welfare
- Hokkaido University
- Grants-in-Aid for Scientific Research [22780268] Funding Source: KAKEN
The mechanism of hantavirus persistent infection in natural hosts is poorly understood due to a lack of laboratory animal models. Herein, we report that Syrian hamsters (Mesocricetus auratus) infected with Puumala virus (PUUV) at 4 weeks old show persistent infection without clinical symptoms for more than 2 months. IgG and IgM antibodies against the viral nucleocapsid protein and neutralizing antibody were first detectable at 14 days postinoculation (dpi) and maintained through 70 dpi. Viral RNA was first detected from 3 dpi in lungs and blood clots, and was detected in all tissues tested at 7 dpi. The viral RNA persisted for at least 70 days in the lungs, kidney, spleen, heart, and brain. The highest level of RNA copies was observed at 14 dpi in the lungs. Slight inflammatory reactions were observed in the lungs, adrenal glands, and brain. Immunohistochemical analysis revealed that PUUV antigen persisted until 56 dpi in the kidneys and adrenal glands. Infected hamsters showed no body weight loss or clinical signs. These results indicate that PUUV infection in hamsters is quite similar to the hantavirus infection of natural host rodents. (C) 2011 Elsevier B.V. All rights reserved.
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