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Typical lesions can be reproduced in SPF broilers after intravenous, aerosol and oral inoculations.The respiratory route is potentially an infection route for pathogenic bacteria.Co-infections tested in this study or dexamethasone do not exacerbate the proportion of lesions.M.s. in combination with IBV or NDV vaccines exacerbates the proportion of positive reisolations.Immunosuppression induced by early CAV infection increases the proportion of positive reisolations.
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http://dx.doi.org/10.1080/03079457.2025.2450428 | DOI Listing |
Vet Microbiol
September 2025
College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Yunfu Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Xinxing, Yunfu, Guangdong 527400, China. Electronic address:
Avian reovirus (ARV) has emerged as a highly prevalent pathogen in Chinese poultry, characterized by its high mutation rate, environmental resilience, and dual vertical-horizontal transmission routes, leading to rising chick morbidity and substantial economic losses. To evaluate vertical transmission, 945 dead embryos and 58 weak chicks from a Guangdong hatchery between January 2023 and December 2024 were tested, yielding a 9.6 % (96/1003) ARV positivity rate.
View Article and Find Full Text PDFAMB Express
August 2025
College of Veterinary Medicine, Northeast Agricultural University, No.600, Changjiang Road, XiangFang District, Harbin, 150030, Heilongjiang Province, People's Republic of China.
Unlabelled: In the prevention and control of animal diseases, synbiotics combine the principles of probiotics and prebiotics, which play crucial roles in reducing intestinal disorders, such as diarrhea and indigestion, enhancing immune function, and decreasing the incidence of respiratory diseases in livestock and poultry. Following the confirmation of the prebiotic activity of lentinan, this study aimed to use microencapsulation technology to prepare synbiotics composed of () and lentinan. The optimal preparation process for the synbiotic microcapsules was determined through single-factor, orthogonal, and response surface experiments.
View Article and Find Full Text PDFVaccine
August 2025
Hipra Scientific, S.L.U. R&D Department, Avda. La Selva 135, 17170 Amer (Girona), Spain.
Avian metapneumovirus (aMPV) infects turkeys and chickens. It replicates primarily in the upper respiratory tract, causing respiratory disease. Animals may also exhibit lower feed and water consumption and weight loss.
View Article and Find Full Text PDFJ Virol Methods
December 2025
Genera Inc., part of Dechra Limited, Svetonedeljska cesta 2, Rakov potok 10436, Croatia.
The study assessed the suitability of four commercially available IBV ELISA kits for detecting antibodies against the QX strain of IBV in poultry. Two experiments were conducted: one in SPF layers under laboratory conditions and another in broiler chickens under field conditions. Chickens were vaccinated with either a candidate vaccine or existing commercially available vaccines against QX strain of IBV.
View Article and Find Full Text PDFVet World
April 2025
Laboratory of Vaccine and Biomolecules, Institute of Bioscience, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
Background And Aim: Infectious bursal disease (IBD) is an immunosuppressive disease caused by the IBD virus (IBDV), which adversely affects poultry vaccination programs. The novel variant IBDV (nvIBDV) has recently emerged in various regions, including Malaysia, raising concerns about its immunosuppressive potential and impact on Newcastle disease (ND) vaccination. This study aimed to investigate the immunosuppressive effects of the Malaysian nvIBDV strain (UPM1432/2019) in specific-pathogen-free (SPF) and broiler chickens and evaluate its influence on ND vaccine efficacy.
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