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Small Ruminant Lentiviruses and Caseous Lymphadenitis.
Vet Clin North Am Food Anim Pract
November 2024
Wolf Veterinary Services, PO Box 422, Rushford, MN 55971, USA.
Ovine progressive pneumonia and caprine arthritis encephalitis together are referred to as small ruminant lentiviruses (SRLVs). Along with caseous lymphadenitis (CL), SRLV are 2 of the so-called "iceberg diseases" of sheep and goats. In the case of SRLV, healthy tissue can be replaced with unproductive lymphoid tissue causing loss of milk, poor growth in lambs, swollen and painful joints, and shortened productive lives of infected animals.
View Article and Find Full Text PDFThe herd-level prevalence of caprine arthritis-encephalitis and genetic characteristics of small ruminant lentivirus in the Lithuanian goat population.
Prev Vet Med
December 2024
Division of Veterinary Epidemiology and Economics, Institute of Veterinary Medicine, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159c, Warsaw 02-776, Poland. Electronic address:
Caprine arthritis-encephalitis (CAE) is a progressive disease of goats caused by small ruminant lentivirus (SRLV) and is considered as one of the most important threats for goat farming in developed countries. The disease prevalence has never been investigated in the Lithuanian goat population. Therefore, a descriptive cross-sectional study was carried out in 2021-2022 to determine if SRLV infection was present in the Lithuanian goat population and, in the case of a positive result, to estimate the true herd-level prevalence of SRLV infection and specify genotypes and subtypes of SRLV responsible for the infection.
View Article and Find Full Text PDFIdentification of concurrent infection with Jaagsiekte sheep retrovirus and maedi-visna virus in China.
J Vet Sci
September 2024
College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China.
Importance: Ovine pulmonary adenomatosis (OPA) and maedi-visna disease (MVD) are chronic and progressive infectious diseases in sheep caused by Jaagsiekte sheep retrovirus (JSRV) and maedi-visna virus (MVV), respectively.
Objective: To investigate the pathological changes and conduct viral gene analysis of OPA and MVD co-occurrence in Inner Mongolia, China.
Methods: Using gross pathology, histopathology, immunohistochemistry, ultrastructural pathology, PCR, and sequence analysis, we investigated the concurrent infection of JSRV and MVV in 319 Dorper rams slaughtered in a private slaughterhouse in Inner Mongolia, in 2022.
Newly developed peptide-ELISA successfully detected anti-IgG antibodies against Maedi-Visna virus in sheep.
Vet Immunol Immunopathol
August 2024
Ege University Faculty of Science Department of Biology Molecular Biology Section, İzmir, Türkiye; Ege University Vaccine Development Application and Research Center, İzmir, Türkiye.
Maedi Visna Virus (MVV) is a retrovirus that can infect sheep. There is still no effective therapy or vaccine against this virus and timely diagnosis is important to combat the complications of the disease. In this study, we aimed to develop an ELISA using peptides derived from gag protein as antigen.
View Article and Find Full Text PDFInvestigation, management and control of a maedi outbreak in Norway in 2019-2020.
Acta Vet Scand
July 2024
Norwegian Veterinary Institute, Elizabeth Stephansens vei 1, Ås, 1433, Norway.
Article Synopsis
- The Visna-maedi disease is a targeted elimination goal in Norway, with strict movement regulations for sheep to prevent outbreaks.
- In 2019, a national surveillance program identified multiple infected sheep flocks in Trøndelag, leading to restrictions on those flocks and their contacts.
- The findings emphasize the need for better diagnostic methods, a robust surveillance strategy, and enhanced biosecurity measures to prevent disease spread and work toward eradicating maedi from Norwegian sheep.
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