Vet Microbiol
Institute of Pathogen Biology and Immunology, College of Biology, Hunan Provincial Key Laboratory of Medical Virology, Hunan University, Changsha 410082, China. Electronic address:
Published: December 2022
Duck circovirus (DuCV) is an immunosuppressive virus and can induce immunosuppression increasing rates of infection caused by other pathogens, which has resulted in gross economic losses in poultry industries. The genome sizes of DuCVs varied from 1987 to 1996 nucleotides (nt). Up to date two DuCV genotypes/lineages, DuCV1 and DuCV2, have been defined, with genome identities of around 83% between each other. In this study, a novel duck circovirus having a genome size of 1755 nt was identified from laying ducks with a disease of egg production declining or abrogation from Hunan province, China. Two major open reading frames (ORFs) were identified, with ORF1 (882 nt) and ORF2 (738 nt) encoding replicase (Rep) and capsid protein (Cap), respectively. Its genome showed the highest identities of 62.3-63.7% and 66.3%- 67.8% to the known genomes of DuCVs and goose circoviruses (GoCVs) available in GenBank, respectively, while it showed less than 50% identities to the genomes of other circoviruses. The amino acid sequence of capsid of this virus showed the highest identities of 45.4%- 47.3% and 42.9%- 44.5% to capsids of the known DuCVs and GoCVs, respectively, while it showed less than 27% identity to the capsid proteins of other circoviruses available in GenBank. Further phylogenetic analyses based on genomes, amino acid sequences of Rep and Cap proteins demonstrated that the present duck circovirus was clustered in a separate clade, distinct from other DuCVs and GoCVs, corroborating it is a distinct novel circovirus species in ducks, tentatively designated as duck cirovirus 3 (DuCV3). The clinical significance and pathogenesis of this virus needs further investigation.
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http://dx.doi.org/10.1016/j.vetmic.2022.109598 | DOI Listing |
Poult Sci
January 2025
Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Taian, 271017, China; Shandong Provincial Key Laboratory of Zoonoses, Shandong, Taian, 271017, China. Electronic address:
Duck circovirus (DuCV) infected multiple breeds of ducks and was widespread in duck factories worldwide. Infected ducks exhibited feathering disorder, growth retardation and immunosuppression, which lead to secondary infection with other pathogens easily. But till now, there has been little research on the study of DuCV due to the absence of appropriate cultural measures.
View Article and Find Full Text PDFMicroorganisms
November 2024
Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and Technology, Guangxi Grass Station, Guangxi University, Nanning 530004, China.
Duck Tembusu virus (DTMUV), duck hepatitis virus (DHV), Muscovy duck reovirus (MDRV), and Muscovy duck parvovirus (MDPV) represent four emergent infectious diseases impacting waterfowl, which can be challenging to differentiate due to overlapping clinical signs. In response to this, we have developed a one-step multiplex real-time fluorescence quantitative reverse transcription PCR (qRT-PCR) assay, capable of simultaneously detecting DTMUV, DHV, MDRV, and MDPV. This method exhibits high specificity, avoiding cross-reactivity with other viruses such as Fowl adenoviruses (FADV), infectious bursal disease virus (IBDV), infectious bronchitis virus (IBV), infectious laryngotracheitis virus (ILTV), Haemophilus paragallinarum (Hpg), duck circovirus (DUCV), goose astrovirus (GoAstV), and mycoplasma gallisepticum (MG).
View Article and Find Full Text PDFAnimals (Basel)
December 2024
Department of Avian Diseases, College of Veterinary Medicine and Center for Avian Disease, Jeonbuk National University, Iksan 54596, Republic of Korea.
Duck circovirus (DuCV) infections cause immunosuppression in ducks, potentially leading to significant economic losses for the duck farming industry. This study investigates the prevalence, genetic characteristics, and evolutionary trends of DuCV in Korea between 2013 and 2022. Samples from 184 farms across seven provinces were analyzed using polymerase chain reaction (PCR).
View Article and Find Full Text PDFVirology
December 2024
School of Life Sciences, Arizona State University, Tempe, AZ, 85287, USA; The Biodesign Center for Fundamental and Applied Microbiomics, Arizona State University, Tempe, AZ, 85287, USA; Center for Evolution and Medicine, Arizona State University, Tempe, AZ, 85287, USA; Structural Biology Research Unit, Department of Integrative, Biomedical Sciences, University of Cape Town, Observatory, Cape Town, 7925, South Africa. Electronic address:
North America is home to over 40 species of migratory waterfowl. Utilizing tissue and cloacal-swab sampling from hunter-harvested carcasses in 2021-2023, we identified circular DNA viruses associated with 116 waterfowl samples from nine species (American wigeons, Mexican ducks, northern shovelers, northern pintails, canvasbacks, mallards, American black ducks, gadwalls, and green-winged teals). We determined the genome sequences of viruses in the families Circoviridae (n = 18) and Hepadnaviridae (n = 2) from the 13 virus-infected birds.
View Article and Find Full Text PDFVirol J
December 2024
Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.
Background: Duck circovirus (DuCV) infections commonly induce immunosuppression and secondary infections in ducks, resulting in significant economic losses in the duck breeding industry. Currently, effective vaccines and treatments for DuCV have been lacking. Therefore, rapid, specific, and sensitive detection methods are crucial for preventing and controlling DuCV.
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