Detection of Influenza D-Specific Antibodies in Bulk Tank Milk from Swedish Dairy Farms
2023
Alvarez, Ignacio | Hägglund, Sara | Näslund, Katarina | Eriksson, Axel | Ahlgren, Evelina | Ohlson, Anna | Ducatez, Mariette, F | Meyer, Gilles | Valarcher, Jean-Francois | Zohari, Siamak | Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) | Department of Clinical Sciences ; Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) | National Veterinary Institute [Uppsala] (SVA) | Växa Sverige AB | Interactions hôtes-agents pathogènes [Toulouse] (IHAP) ; Ecole Nationale Vétérinaire de Toulouse (ENVT) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | This research was funded partly by the European Food Safety Authority (Grant Agreement Numbers GP/EFSA/2017/01-GA04 and GP/EFSA/ENCO/2020/03) and by ICRAD FORMAS, grant number 2020-02742.
International audience
Mostrar más [+] Menos [-]Inglés. Influenza D virus (IDV) has been detected in bovine respiratory disease (BRD) outbreaks, and experimental studies demonstrated this virus's capacity to cause lesions in the respiratory tract. In addition, IDV-specific antibodies were detected in human sera, which indicated that this virus plays a potential zoonotic role. The present study aimed to extend our knowledge about the epidemiologic situation of IDV in Swedish dairy farms, using bulk tank milk (BTM) samples for the detection of IDV antibodies. A total of 461 and 338 BTM samples collected during 2019 and 2020, respectively, were analyzed with an in-house indirect ELISA. In total, 147 (32%) and 135 (40%) samples were IDV-antibody-positive in 2019 and 2020, respectively. Overall, 2/125 (2%), 11/157 (7%) and 269/517 (52%) of the samples were IDV-antibody-positive in the northern, middle and southern regions of Sweden. The highest proportion of positive samples was repeatedly detected in the south, in the county of Halland, which is one of the counties with the highest cattle density in the country. In order to understand the epidemiology of IDV, further research in different cattle populations and in humans is required.
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