|   |  |   |  |       Vertebrate (species and organ) and arthropod       |       No. isolations/No. tested       |       No. with antibody/No. tested Test used       |       Country and region       | 
|---|
 
  |  
  |  | *           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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