| | | | | Vertebrate (species and organ) and arthropod | No. isolations/No. tested | No. with antibody/No. tested Test used | Country and region |
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| | * Strains Puumala (2,3), Hankasalmi (1), Sotkamo (1) | | ** Strain Hallnas | | | | Clethrionomys glareolus | 3/48 * | 155/549 IFA | "Lake Finland", Finland; 1977, 1979, 1981 (1-3) | | Clethrionomys glareolus | 1/25 ** | | West of Umea, Sweden;1981 (5, 6) | | Clethrionomys rufocanus | 1/19 | 1/19 IFA | Sweden (7) | | Clethrionomys glareolus | Several | | European USSR (9, 10) | | Clethrionomys glareolus(lungs) | 1 | | Turnkout, Antwerp Prov., Belgium (11) |
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