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Mohamed RI, Elsamadony HA, Alghamdi RA, Eldin ALAZ, El-Shemy A, Abdel-Moez Amer S, Bahshwan SMA, El-Saadony MT, El-Sayed HS, El-Tarabily KA, Saad ASA. Molecular and pathological screening of the current circulation of fowlpox and pigeon pox virus in backyard birds. Poult Sci 2024; 103:104249. [PMID: 39418793 DOI: 10.1016/j.psj.2024.104249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 08/18/2024] [Accepted: 08/19/2024] [Indexed: 10/19/2024] Open
Abstract
Avian pox is a disease that has devastating impacts on both poultry and wild bird species. Avian pox is caused by various strains of avipoxviruses (APV). Nevertheless, the virus has been detected in pigeons and chickens that are raised in backyard areas, leading to substantial financial damage for small-scale producers. There is a lack of comprehensive information regarding the transmission of APV among birds in the backyards and residential areas. Hence, the present investigation closely monitored and observed APV in domesticated birds residing in backyard areas, with the aim of impeding the transmission of the virus to nearby poultry farms. In 2023, a total of fifty backyard flocks were surveyed for the presence of avian pox disease. Sixteen backyards (14 pigeons and 2 chickens) exhibited warty nodular lesions on their heads and nonfeathered body parts. APV was confirmed in nodular lesions by polymerase chain reaction (PCR) amplification and genetic sequencing. All samples from the lesions showed successful amplification of the p4b locus (core protein p4b). Four confirmed samples were tested for pathogenicity on the chicken embryo chorioallantoic membrane (CAM). Histopathological examination revealed ballooning degeneration and numerous intracytoplasmic inclusion bodies (Bollinger bodies) in the ectoderm of the infected CAM. Phylogenetic analysis revealed that the strains clustered into main clade A, with 11 in subclade A2 and 5 in subclade A1. Amino acid identity showed 100% similarity between the vaccine (fowlpox/VSVRI/Egypt) and some detected strains (PP537574 and PP537575). In addition, the PP537576.1 to PP537580.1 and PP537582.1 to PP537585.1 had 2-point mutations compared to the fowlpox/VSVRI/Egypt vaccine. The overall finding of low biosecurity levels in the investigated backyard birds emphasizes the significance of establishing sanitary measures and control vectors to reduce virus transmission routes and disease severity. In conclusion, it is necessary to emphasize the tracking of APV in backyard birds. Concurrently, we advised enhancing hygiene protocols, vector management, and subsequent vaccination to restrict the occurrence of APV outbreaks and prevent their transmission to neighboring poultry farms. Furthermore, it is crucial to incorporate molecular studies in order to enhance the vaccine seeds for disease management.
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Affiliation(s)
- Rania I Mohamed
- Department of Pathology, Agricultural Research Center (ARC), Animal Health Research Institute- Mansoura Provincial Laboratory (AHRI-Mansoura), Mansoura, 35511, Egypt
| | - Hanaa A Elsamadony
- Department of Poultry Diseases, Animal Health Research Institute (AHRI), Agricultural Research Center (ARC), Giza, 12618, Egypt
| | - Rana A Alghamdi
- Department of Chemistry, Science and Arts College, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
| | | | - Ahmed El-Shemy
- Department of Parasitology and Animal Diseases, Veterinary Research Institute, National Research Centre, Giza, 12622, Egypt
| | - Sameh Abdel-Moez Amer
- Department of Poultry Diseases, Veterinary Research Institute, National Research Centre, Giza, 12622, Egypt
| | - Safia M A Bahshwan
- Biological Sciences Department, College of Science and Arts, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
| | - Mohamed T El-Saadony
- Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt
| | - Hemat S El-Sayed
- Department of Poultry Diseases, Benha-Branch, Agricultural Research Center (ARC), Animal Health Research Institute, Benha, 13511, Egypt
| | - Khaled A El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, Al Ain, 15551, United Arab Emirates.
| | - Aalaa S A Saad
- Department of Biotechnology, Agricultural Research Center (ARC), Animal Health Research Institute (AHRI), Giza, 12618, Egypt
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Santos D, Fagulha T, Duarte MD, Duarte A, Ramos F, Barros SC, Luís T, Henriques AM. Snapshot of the Phylogenetic Relationships among Avian Poxviruses Circulating in Portugal between 2017 and 2023. Vet Sci 2023; 10:693. [PMID: 38133244 PMCID: PMC10747575 DOI: 10.3390/vetsci10120693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/16/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
Avipoxvirus (APV), a linear dsDNA virus belonging to the subfamily Chordopoxvirinae of the family Poxviridae, infects more than 278 species of domestic and wild birds. It is responsible for causing avian pox disease, characterized by its cutaneous and diphtheric forms. With a high transmission capacity, it can cause high economic losses and damage to the ecosystem. Several diagnostic methods are available, and bird vaccination can be an effective preventive measure. Ten APV-positive samples were analyzed to update the molecular characterization and phylogenetic analysis of viruses isolated in Portugal between 2017 and 2023. A P4b gene fragment was amplified using a PCR, and the nucleotide sequence of the amplicons was determined using Sanger sequencing. The sequences obtained were aligned using ClustalW, and a maximum likelihood phylogenetic tree was constructed. With this study, it was possible to verify that the analyzed sequences are distributed in subclades A1, A2, B1, and B3. Since some of them are quite similar to others from different countries and obtained in different years, it is possible to conclude that there have been several viral introductions in Portugal. Finally, it was possible to successfully update the data on Avipoxviruses in Portugal.
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Affiliation(s)
- Daniela Santos
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
| | - Teresa Fagulha
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
| | - Margarida Dias Duarte
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
- Centre for Interdisciplinary Research in Animal Health (CIISA), Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal
| | - Ana Duarte
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
- Centre for Interdisciplinary Research in Animal Health (CIISA), Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal
| | - Fernanda Ramos
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
| | - Sílvia Carla Barros
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
| | - Tiago Luís
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
| | - Ana Margarida Henriques
- Laboratório de Virologia, Instituto Nacional de Investigação Agrária e Veterinária, 2780-157 Oeiras, Portugal; (D.S.); (T.F.); (M.D.D.); (A.D.); (F.R.); (S.C.B.); (T.L.)
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