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Volume 30, Number 8—August 2024
Research

Emergence of Bluetongue Virus Serotype 3, the Netherlands, September 2023

Melle Holwerda1Comments to Author , Inge M.G.A. Santman-Berends1, Frank Harders, Marc Engelsma, Rianka P.M. Vloet, Eveline Dijkstra, Rene G.P. van Gennip, Maria H. Mars, Marcel Spierenburg, Lotte Roos, René van den Brom1, and Piet A. van Rijn1
Author affiliations: Wageningen Bioveterinary Research, Lelystad, the Netherlands (M. Holwerda, F. Harders, M. Engelsma, R.P.M. Vloet, R.G.P. van Gennip, P.A. van Rijn); Royal GD, Deventer, the Netherlands (I.M.G.A. Santman-Berends, E. Dijkstra, M.H. Mars, L. Roos, R. van den Brom); Netherlands Food and Consumer Product Safety Authority, Utrecht, the Netherlands (M. Spierenburg); North-West University, Potchefstroom, South Africa (P.A. van Rijn)

Main Article

Table 3

Herd-level BTV antibody results for 991 cow bulk milk samples collected in August 2023 in study of emergence of BTV-3, the Netherlands*

Compartment No. dairy herds No. herds tested No. negative bulk milk samples No. milk samples with potentially positive or positive result
 Antibody-positive milk samples, % (95% CI)†
Total Evidence of BTV vaccination No evidence of BTV vaccination
1 1,669 49 49 0 0 0 0 (0–5.9)
2 678 49 49 0 0 0 0 (0–5.9)
3 880 51 51 0 0 0 0 (0–5.7)
4 1,040 49 48 1 0 1 2.0 (0.1–10.9)
5 963 47 45 2 2 0 0 (0–6.4)
6 352 49 49 0 0 0 0 (0–5.9)
7 562 52 52 0 0 0 0 (0–5.6)
8 1,332 50 49 1 1 0 0 (0–5.9)
9 610 51 51 0 0 0 0 (0–5.7)
10 546 48 47 1 0 1 2.1 (0.1–11.1)
11 1,412 48 46 2 1 1 2.1 (0.1–11.3)
12 942 50 49 1 0 1 2.0 (0.1–10.6)
13 464 53 52 1 1 0 0 (0–5.6)
14 162 48 44 4 2 2 4.3 (0.1–14.8)
15 96 50 50 0 0 0 0 (0–5.8)
16 457 47 46 1 1 0 0 (0–6.3)
17 293 52 43 9 7 2 4.4 (0.1–15.1)
18 778 52 47 5 5 0 0 (0–6.2)
19 361 48 43 5 3 2 4.4 (0.1–15.1)
20 145 48 45 3 1 2 4.3 (0.1–14.5)
Total 13,742 991 955 36 24 12 1.2 (0.1–2.2)

*Bulk milk samples were collected from dairy cattle herds in 20 compartments of the Netherlands in August 2023 and retrospectively analyzed to determine if BTV infections occurred before the detection of BTV-3 in sheep in September. BTV, bluetongue virus. †Determined for cows that had no evidence of vaccination against BTV.

Main Article

1These authors contributed equally to this article.

Page created: June 13, 2024
Page updated: July 20, 2024
Page reviewed: July 20, 2024
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