Table 1. Tick and mammal sampling sites, years and TBEV-RT-PCR and TBEV-IFA results.
| Site, year | Human cases | Ticks TBEV RNA pos/total | Mammal species (n) | Brains TBEV RNA pos/total | Spleens TBEV RNA pos/total | Serology TBEV Ab pos/total |
|---|---|---|---|---|---|---|
| Sipoo archipelago, 2013 | 1 in 2011 2 in 2016 | 5/90 | Myodes glareolus (21) | 0/21 | 0/20 | 1/21 |
| Microtus agrestis (1) | 0/1 | 0/1 | 0/1 | |||
| Apodemus flavicollis (3) | 0/3 | 0/3 | 0/3 | |||
| Sorex sp (2) | 0/1 | 0/2 | 0/2 | |||
| Helsinki Karhusaari, 2013 | 1 in 2016 | 0/9 | Myodes glareolus (1) | N/A | N/A | 0/1 |
| Apodemus flavicollis (1) | 0/1 | 0/1 | 0/1 | |||
| Helsinki Jollas, 2016–18 | 2 in 2014 1 in 2017 | 0/62 | Myodes glareolus (26) | 1/26 | 0/26 | 6/26 |
| Microtus agrestis (4) | 0/4 | 0/4 | 0/4 | |||
| Apodemus flavicollis (3) | 0/2 | 0/3 | 0/3 | |||
| Sorex araneus (2) | 0/2 | 0/2 | 0/2 | |||
| Helsinki Santahamina, 2015–2017 | no cases | 0/18 | Myodes glareolus (30) | 0/27 | 0/29 | 0/30 |
| Microtus agrestis (7) | 0/7 | 0/7 | 0/7 | |||
| Apodemus flavicollis (8) | 0/8 | 0/8 | 0/8 | |||
| Sorex sp (3) | 0/2 | 0/3 | 0/3 | |||
| Helsinki Vallisaari, 2016 | no cases | 0/34 | No samples | |||
| Helsinki Lauttasaari 2016–2017 | no cases | 0/80 | No samples | |||
| Espoo Tontunmäki 2014, 2016 | 1 in 2013 | 0/6 | Myodes glareolus (6) | N/A | N/A | 0/6 |
| Microtus agrestis (2) | N/A | N/A | 0/2 | |||
| Apodemus flavicollis (8) | N/A | N/A | 0/8 | |||
| Espoo and Kauniainen 2016–2017 | see Figure 1 | 14/679 |