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Expression of bluetongue virus full-length VP7 protein in insect cells and its diagnostic utility for detection of antibodies to the virus infection.
J Immunol Methods
January 2025
ICAR-Indian Veterinary Research Institute, Bangalore, Karnataka 560024, India.
Bluetongue (BT) is a vector-borne viral disease of multiple domestic and wild ruminants across the globe. The VP7 protein of bluetongue virus (BTV) is the major immune-dominant structural protein that is conserved across the BTV serotypes and therefore, targeted for the development of immuno-diagnostics for BT. In this study, full-length recombinant VP7 protein (rVP7) of BTV-1 was expressed in Trochoplusia ni derived insect cells (Tn5) using codon-optimized synthetic gene construct through baculovirus expression system.
View Article and Find Full Text PDFA habitat suitability analysis for three Culicoides species implicated in bluetongue virus transmission in the Southeastern United States.
Med Vet Entomol
January 2025
Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA.
Culicoides biting midges adversely impact animal health through transmission of multiple orbiviruses, such as bluetongue virus (BTV). This study used light trapping data collected in the Southeastern United States for three Culicoides midge species that are confirmed or suspected BTV vectors: Culicoides insignis, Culicoides stellifer and Culicoides venustus. Midge presence datasets were combined with meteorological data and ecological data to model habitat suitability for each species.
View Article and Find Full Text PDFEmergence 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.
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