Volume 28, Number 12—December 2022
Research
Continued Circulation of Tick-Borne Encephalitis Virus Variants and Detection of Novel Transmission Foci, the Netherlands
Table 2
Rodents that tested positive for the presence of tick-borne encephalitis virus antibodies by SNT or viral RNA in tissue samples by PCR, the Netherlands, 2018–2020*
Sample ID | Species | Sex | Serologic result† | SNT | PCR result, Ct value | Nature area | Municipality | Year |
---|---|---|---|---|---|---|---|---|
18–2752 |
Apodemus sylvaticus |
M |
Weak positive |
Negative |
Negative |
National Park de Groote Peel |
Peel en Maas |
2018 |
18–2779 |
A. sylvaticus |
F |
Weak positive |
Not tested‡ |
Negative |
National Park Sallandse Heuvelrug |
Rijssen-Holten |
2018 |
18–2829 |
A. sylvaticus |
M |
Weak positive |
Negative |
Negative |
National Park Sallandse Heuvelrug |
Hellendoorn |
2018 |
18–2830 |
A. sylvaticus |
F |
Positive |
Negative |
Negative |
National Park Sallandse Heuvelrug |
Hellendoorn |
2018 |
19–2893 |
A. sylvaticus |
F |
Positive |
Not tested‡ |
Negative |
National Park Utrechtse Heuvelrug |
Zeist |
2019 |
19–2895 |
A. sylvaticus |
F |
Positive |
Negative |
Negative |
National Park Utrechtse Heuvelrug |
Zeist |
2019 |
19–2896 |
A. sylvaticus |
M |
Positive |
Negative |
Negative |
National Park Utrechtse Heuvelrug |
Zeist |
2019 |
19–2901 |
A. sylvaticus |
M |
Weak positive |
Negative |
Negative |
Springendal |
Tubbergen |
2019 |
19–2916 |
A. sylvaticus |
M |
Positive |
Not tested‡ |
Negative |
Nijverdal Garden |
Hellendoorn |
2019 |
19–2997 |
My. glareolus |
M |
Weak positive |
Negative |
Negative |
Natuurpark de Leemputten |
Oost Gelre |
2019 |
19–3001 |
Microtus arvalis |
F |
Negative |
Not tested |
Spleen 30.74, brain 30.09 |
Natuurpark de Leemputten |
Oost Gelre |
2019 |
19–3002 |
Mi. arvalis |
F |
Weak positive |
Positive |
Spleen 30.57; brain 28.33 |
Natuurpark de Leemputten |
Oost Gelre |
2019 |
19–3053 | Myodes glareolus | F | Negative | Not tested | Spleen 35.68; brain negative | Rijk van Nijmegen | Berg en Dal | 2019 |
*Ct, cycle threshold; SNT, serum neutralization test. †Positive = 3 × ODNC (optical density of the negative control), borderline = 2 × ODNC. ‡Not tested because of too little volume.