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Emergence of Bluetongue Virus Serotype 3 in Portugal (2024).
Viruses
November 2024
Virology Laboratory, Nacional Institute of Agrarian and Veterinarian Research, Quinta Do Marquês, Av. da República, 2780-157 Oeiras, Portugal.
Article Synopsis
- Bluetongue virus serotype 3 (BTV-3) was detected in Portugal's Alentejo region in September 2024, first identified in a sheep showing severe symptoms like head swelling and respiratory issues.
- Two cases were confirmed within the same area, leading to high mortality rates in affected livestock.
- In light of the rapid spread of BTV-3, monitoring and vaccination campaigns are underway to protect livestock health and control the virus's transmission.
Challenges of BTV-Group Specific Serology Testing: No One Test Fits All.
Viruses
November 2024
The Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Animal Health Laboratory, Australian Centre for Disease Preparedness, 5 Portarlington Road, East Geelong, VIC 3219, Australia.
A newly formatted enzyme-linked immunosorbent assay (ELISA) for the detection of antibodies to bluetongue virus (BTV) was developed and validated for bovine and ovine sera and plasma. Validation of the new sandwich ELISA (sELISA) was achieved with 949 negative bovine and ovine sera from BTV endemic and non-endemic areas of Australia and 752 BTV positive (field and experimental) sera verified by VNT and/or PCR. The test diagnostic sensitivity (DSe) and diagnostic specificity (DSp) were 99.
View Article and Find Full Text PDFBluetongue virus serotype 12 in sheep and cattle in the Netherlands in 2024 - A BTV serotype reported in Europe for the first time.
Vet Microbiol
February 2025
Wageningen Bioveterinary Research (WBVR), Department of Virology, P.O. Box 65, Lelystad 8200 AB, the Netherlands.
Bluetongue (BT) is a viral vector borne disease primarily affecting ruminants such as sheep, cattle, and goats. On 3 September 2023, the Netherlands reported the first case of bluetongue virus serotype 3 (BTV-3/NET2023)), after being BTV free for eleven years. Vaccination with inactivated BT vaccines for serotype 3 has been applied in the Netherlands since May 2024.
View Article and Find Full Text PDFBackground: Bluetongue virus serotype 3 (BTV-3) was detected for the first time in cattle and sheep in southern England in 2023, the first UK BTV incursion for more than 15 years. Clinical signs were not observed, yet severe clinical disease and mortality were reported during recent BTV-3 outbreaks in northern Europe.
Methods: To investigate the clinical disease and infection kinetics associated with this UK BTV-3 strain, five British sheep were infected with a UK BTV-3 isolate using Culicoides biting midges.
Culicoides and midge-associated arboviruses on cattle farms in Yunnan Province, China.
Parasite
November 2024
Yunnan Tropical and Subtropical Animal Virus Diseases Laboratory, Yunnan Animal Science and Veterinary Institute, Fengyu Road, Panlong District, Kunming 650224, Yunnan, China - Key Laboratory of Transboundary Animal Diseases Prevention and Control (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Fengyu Road, Panlong District, Kunming 650224, Yunnan, China.
Article Synopsis
- - Culicoides spp., small biting midges, are important vectors of viruses like African horse sickness and bluetongue that affect livestock; a study in Yunnan Province, China examined their diversity and abundance on two cattle farms from March 2022 to March 2023.
- - Light traps collected 19 species of Culicoides, with C. oxystoma being the most prevalent, making up over 63% of the total 8,343 specimens; 10 species were screened for several viruses using RT-qPCR.
- - Notably, one strain of Yunnan Orbivirus was isolated from cattle blood, and the first connection between a totivirus (YSToV) and Culicoides was found
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