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Jackson RT, Marshall PM, Burkhart C, Schneck J, Kelly G, Roberts CP. Risk of invasive waterfowl interaction with poultry production: Understanding potential for avian pathogen transmission via species distribution models. Ecol Evol 2024; 14:e11647. [PMID: 39026949 PMCID: PMC11257698 DOI: 10.1002/ece3.11647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 06/08/2024] [Accepted: 06/14/2024] [Indexed: 07/20/2024] Open
Abstract
Recent outbreaks of highly pathogenic avian influenza have devastated poultry production across the United States, with more than 77 million birds culled in 2022-2024 alone. Wild waterfowl, including various invasive species, host numerous pathogens, including highly pathogenic avian influenza virus (HPAIV), and have been implicated as catalysts of disease outbreaks among native fauna and domestic birds. In major poultry-producing states like Arkansas, USA, where the poultry sector is responsible for significant economic activity (>$4 billion USD in 2022), understanding the risk of invasive waterfowl interactions with domestic poultry is critical. Here, we assessed the risk of invasive waterfowl-poultry interaction in Arkansas by comparing the density of poultry production sites (chicken houses) to areas of high habitat suitability for two invasive waterfowl species, (Egyptian Goose [Alopochen aegyptiaca] and Mute Swan [Cygnus olor]), known to host significant pathogens, including avian influenza viruses. The percentage of urban land cover was the most important habitat characteristic for both invasive waterfowl species. At the 95% confidence interval, chicken house densities in areas highly suitable for both species (Egyptian Goose = 0.91 ± 0.11 chicken houses/km2; Mute Swan = 0.61 ± 0.03 chicken houses/km2) were three to five times higher than chicken house densities across the state (0.17 ± 0.01 chicken houses/km2). We show that northwestern and western Arkansas, both areas of high importance for poultry production, are also at high risk of invasive waterfowl presence. Our results suggest that targeted monitoring efforts for waterfowl-poultry contact in these areas could help mitigate the risk of avian pathogen exposure in Arkansas and similar regions with high poultry production.
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Affiliation(s)
- Reilly T. Jackson
- Department of Biological SciencesUniversity of ArkansasFayettevilleArkansasUSA
| | | | - Chris Burkhart
- Department of Biological SciencesUniversity of ArkansasFayettevilleArkansasUSA
| | - Julia Schneck
- Department of Biological SciencesUniversity of ArkansasFayettevilleArkansasUSA
| | - Grant Kelly
- Department of Biological SciencesUniversity of ArkansasFayettevilleArkansasUSA
| | - Caleb P. Roberts
- U.S. Geological Survey, Arkansas Fish and Wildlife Cooperative Research UnitUniversity of ArkansasFayettevilleArkansasUSA
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2
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Zeng J, Du F, Xiao L, Sun H, Lu L, Lei W, Zheng J, Wang L, Shu S, Li Y, Zhang Q, Tang K, Sun Q, Zhang C, Long H, Qiu Z, Zhai K, Li Z, Zhang G, Sun Y, Wang D, Zhang Z, Lycett SJ, Gao GF, Shu Y, Liu J, Du X, Pu J. Spatiotemporal genotype replacement of H5N8 avian influenza viruses contributed to H5N1 emergence in 2021/2022 panzootic. J Virol 2024; 98:e0140123. [PMID: 38358287 PMCID: PMC10949427 DOI: 10.1128/jvi.01401-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/22/2024] [Indexed: 02/16/2024] Open
Abstract
Since 2020, clade 2.3.4.4b highly pathogenic avian influenza H5N8 and H5N1 viruses have swept through continents, posing serious threats to the world. Through comprehensive analyses of epidemiological, genetic, and bird migration data, we found that the dominant genotype replacement of the H5N8 viruses in 2020 contributed to the H5N1 outbreak in the 2021/2022 wave. The 2020 outbreak of the H5N8 G1 genotype instead of the G0 genotype produced reassortment opportunities and led to the emergence of a new H5N1 virus with G1's HA and MP genes. Despite extensive reassortments in the 2021/2022 wave, the H5N1 virus retained the HA and MP genes, causing a significant outbreak in Europe and North America. Furtherly, through the wild bird migration flyways investigation, we found that the temporal-spatial coincidence between the outbreak of the H5N8 G1 virus and the bird autumn migration may have expanded the H5 viral spread, which may be one of the main drivers of the emergence of the 2020-2022 H5 panzootic.IMPORTANCESince 2020, highly pathogenic avian influenza (HPAI) H5 subtype variants of clade 2.3.4.4b have spread across continents, posing unprecedented threats globally. However, the factors promoting the genesis and spread of H5 HPAI viruses remain unclear. Here, we found that the spatiotemporal genotype replacement of H5N8 HPAI viruses contributed to the emergence of the H5N1 variant that caused the 2021/2022 panzootic, and the viral evolution in poultry of Egypt and surrounding area and autumn bird migration from the Russia-Kazakhstan region to Europe are important drivers of the emergence of the 2020-2022 H5 panzootic. These findings provide important targets for early warning and could help control the current and future HPAI epidemics.
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Affiliation(s)
- Jinfeng Zeng
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Fanshu Du
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Linna Xiao
- Key Laboratory for Biodiversity Science and Ecological Engineering, Demonstration Center for Experimental Life Sciences & Biotechnology Education, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Honglei Sun
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Lu Lu
- The Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Weipan Lei
- Key Laboratory for Biodiversity Science and Ecological Engineering, Demonstration Center for Experimental Life Sciences & Biotechnology Education, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Jialu Zheng
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Lu Wang
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Sicheng Shu
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Yudong Li
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Qiang Zhang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Kang Tang
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Qianru Sun
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Chi Zhang
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Haoyu Long
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Zekai Qiu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Ke Zhai
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Zhichao Li
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Geli Zhang
- College of Land Science and Technology, China Agricultural University, Beijing, China
| | - Yipeng Sun
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Dayan Wang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Zhengwang Zhang
- Key Laboratory for Biodiversity Science and Ecological Engineering, Demonstration Center for Experimental Life Sciences & Biotechnology Education, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Samantha J. Lycett
- The Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - George F. Gao
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing, China
| | - Yuelong Shu
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- National Health Commission Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology of Chinese Academy of Medical Science (CAMS)/Peking Union Medical College (PUMC), Beijing, China
| | - Jinhua Liu
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiangjun Du
- School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, China
- School of Public Health (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
- Key Laboratory of Tropical Disease Control, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Juan Pu
- National Key Laboratory of Veterinary Public Health and Safety, Key Laboratory for Prevention and Control of Avian Influenza and Other Major Poultry Diseases, Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, China Agricultural University, Beijing, China
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3
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Carnegie L, Raghwani J, Fournié G, Hill SC. Phylodynamic approaches to studying avian influenza virus. Avian Pathol 2023; 52:289-308. [PMID: 37565466 DOI: 10.1080/03079457.2023.2236568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 06/23/2023] [Accepted: 07/07/2023] [Indexed: 08/12/2023]
Abstract
Avian influenza viruses can cause severe disease in domestic and wild birds and are a pandemic threat. Phylodynamics is the study of how epidemiological, evolutionary, and immunological processes can interact to shape viral phylogenies. This review summarizes how phylodynamic methods have and could contribute to the study of avian influenza viruses. Specifically, we assess how phylodynamics can be used to examine viral spread within and between wild or domestic bird populations at various geographical scales, identify factors associated with virus dispersal, and determine the order and timing of virus lineage movement between geographic regions or poultry production systems. We discuss factors that can complicate the interpretation of phylodynamic results and identify how future methodological developments could contribute to improved control of the virus.
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Affiliation(s)
- L Carnegie
- Department of Pathobiology and Population Sciences, Royal Veterinary College (RVC), Hatfield, UK
| | - J Raghwani
- Department of Pathobiology and Population Sciences, Royal Veterinary College (RVC), Hatfield, UK
| | - G Fournié
- Department of Pathobiology and Population Sciences, Royal Veterinary College (RVC), Hatfield, UK
- Université de Lyon, INRAE, VetAgro Sup, UMR EPIA, Marcy l'Etoile, France
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR EPIA, Saint Genes Champanelle, France
| | - S C Hill
- Department of Pathobiology and Population Sciences, Royal Veterinary College (RVC), Hatfield, UK
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4
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Ahrens AK, Selinka HC, Mettenleiter TC, Beer M, Harder TC. Exploring surface water as a transmission medium of avian influenza viruses - systematic infection studies in mallards. Emerg Microbes Infect 2022; 11:1250-1261. [PMID: 35473641 PMCID: PMC9090351 DOI: 10.1080/22221751.2022.2065937] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mallards (Anas platyrhynchos) are an abundant anseriform migratory wild bird species worldwide and an important reservoir for the maintenance of low pathogenicity (LP) avian influenza viruses (AIV). They have also been implicated in the spread of high pathogenicity (HP) AIV after spill-over events from HPAIV-infected poultry. The spread of HPAIV within wild water bird populations may lead to viral contamination of natural habitats. The role of small shallow water bodies as a transmission medium of AIV among mallards is investigated here in three experimental settings. (i) Delayed onset but rapid progression of infection seeded by two mallards inoculated with either LP or HP AIV to each eight sentinel mallards was observed in groups with access to a small 100 L water pool. In contrast, groups with a bell drinker as the sole source of drinking water showed a rapid onset but lengthened course of infection. (ii) HPAIV infection also set off when virus was dispersed in the water pool; titres as low as 102 TCID50 L-1 (translating to 0.1 TCID50 mL-1) proved to be sufficient. (iii) Substantial loads of viral RNA (and infectivity) were also found on the surface of the birds' breast plumage. "Unloading" of virus infectivity from contaminated plumage into water bodies may be an efficient mechanism of virus spread by infected mallards. However, transposure of HPAIV via the plumage of an uninfected mallard failed. We conclude, surface water in small shallow water bodies may play an important role as a mediator of AIV infection of aquatic wild birds.
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Affiliation(s)
- Ann Kathrin Ahrens
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
| | | | | | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
| | - Timm C Harder
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Isle of Riems, Germany
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5
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Das Gupta S, Barua B, Fournié G, Hoque MA, Henning J. Village and farm-level risk factors for avian influenza infection on backyard chicken farms in Bangladesh. Sci Rep 2022; 12:13009. [PMID: 35906262 PMCID: PMC9338044 DOI: 10.1038/s41598-022-16489-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022] Open
Abstract
A cross-sectional study was conducted with 144 small-scale poultry farmers across 42 Bangladeshi villages to explore risk factors associated with avian influenza H5 and H9 seropositivity on backyard chicken farms. Using mixed-effects logistic regression with village as random effect, we identified crow abundance in garbage dumping places and presence of migratory wild birds within villages to be associated with higher odds of H5 and H9 seropositivity. At farm-level, garbage around poultry houses was also associated with higher odds of H5 and H9 seropositivity. In addition, specific trading practices (such as, purchase of chickens from live bird markets (LBM) and neighboring farms to raise them on their own farms, frequency of visits to LBM, purchase of poultry at LBM for consumption) and contact of backyard chickens with other animals (such as, feeding of different poultry species together, using pond water as drinking source for poultry, access of feral and wild animals to poultry houses) were associated with higher odds of H5 or H9 seropositivity. Resource-constrained small-scale poultry farmers should be able to address risk factors identified in this study without requiring large investments into poultry management, thereby reducing the likelihood of avian influenza virus transmission and ultimately occurrence of avian influenza outbreaks.
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Affiliation(s)
- Suman Das Gupta
- School of Veterinary Science, University of Queensland, Gatton, QLD, 4343, Australia.
| | - Brishti Barua
- Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
| | - Guillaume Fournié
- Department of Pathobiology and Population Sciences, Royal Veterinary College, University of London, London, UK
| | - Md Ahasanul Hoque
- Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
| | - Joerg Henning
- School of Veterinary Science, University of Queensland, Gatton, QLD, 4343, Australia
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6
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Lublin A, Thie N, Shkoda I, Simanov L, Bar-Gal GK, Farnoushi Y, King R, Getz WM, Kamath PL, Bowie RCK, Nathan R. First detection of avian influenza subtype H4N6 in Israel in a wild mallard (Anas platyrhynchos). Transbound Emerg Dis 2022; 69:e3316-e3326. [PMID: 35687561 DOI: 10.1111/tbed.14610] [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: 01/25/2022] [Revised: 05/08/2022] [Accepted: 05/25/2022] [Indexed: 11/27/2022]
Abstract
Avian influenza viruses (AIV) are a worldwide threat to animal and human health. As wild waterfowl circulate and spread these viruses around the world, investigations of AIV prevalence in wild populations are critical for understanding pathogen transmission, as well as predicting disease outbreaks in domestic animals and humans. Surveillance efforts in this study have isolated H4N6 for the first time in Israel from a faecal sample of a wild mallard (Anas platyrhynchos). Phylogenetic analyses of the HA and NA genes revealed that this strain is closely related to isolates from Europe and Asia. This Eurasian origin, together with Israel serving as an important migratory bottleneck of the mid Palearctic-African flyway, suggests a potential introduction of this strain by migratory birds. Additional phylogenetic analysis of the isolate's internal genes (PB1, PB2, PA, NP, M and NS) revealed high levels of phylogenetic relatedness with other AIV subtypes, indicating previous reassortment events. High reassortment rates are characteristic for H4N6 viruses, which, together with this subtype's ability to infect pigs and adaptability to the human receptor binding domain, raises the concern that it would potentially become zoonotic in the future. These results emphasize the importance of continuous AIV monitoring in migratory birds.
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Affiliation(s)
- Avishai Lublin
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Nikki Thie
- Movement Ecology Lab, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Irina Shkoda
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Luba Simanov
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Gila Kahila Bar-Gal
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Yigal Farnoushi
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Roni King
- Israel Nature and Parks Authority (INPA), Jerusalem, Israel
| | - Wayne M Getz
- Department of Environmental Science, Policy & Management, University of California, Berkeley, California.,School of Mathematical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Pauline L Kamath
- School of Food and Agriculture, University of Maine, Orono, Maine
| | - Rauri C K Bowie
- Museum of Vertebrate Zoology, University of California, Berkeley, California.,Department of Integrative Biology, University of California, Berkeley, California
| | - Ran Nathan
- Movement Ecology Lab, The Hebrew University of Jerusalem, Jerusalem, Israel
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7
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Elsobky Y, El Afandi G, Salama A, Byomi A, Omar M, Eltholth M. Spatiotemporal analysis of highly pathogenic avian influenza (H5N1) outbreaks in poultry in Egypt (2006 to 2017). BMC Vet Res 2022; 18:174. [PMID: 35550145 PMCID: PMC9097238 DOI: 10.1186/s12917-022-03273-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/26/2022] [Indexed: 11/25/2022] Open
Abstract
Background In Egypt, the highly pathogenic avian influenza (HPAI) subtype H5N1 is endemic and possesses a severe impact on the poultry. To provide a better understanding of the distributional characteristics of HPAI H5N1 outbreaks in Egypt, this study aimed to explore the spatiotemporal pattern and identify clusters of HPAI H5N1 outbreaks in Egypt from 2006 to 2017. Results The Epidemic curve (EC) was constructed through time series analysis; in which six epidemic waves (EWs) were revealed. Outbreaks mainly started in winter peaked in March and ended in summer. However, newly emerged thermostable clades (2.2.1.1 and 2.2.1.2) during the 4th EW enabled the virus to survive and cause infection in warmer months with a clear alteration in the seasonality of the epidemic cycle in the 5th EW. The endemic situation became more complicated by the emergence of new serotypes. As a result, the EC ended up without any specific pattern since the 6th EW to now. The spatial analysis showed that the highest outbreak density was recorded in the Nile Delta considering it as the ‘Hot spot’ region. By the 6th EW, the outbreak extended to include the Nile valley. From spatiotemporal cluster epidemics, clustering in the Delta was a common feature in all EWs with primary clusters consistently detected in the hot-spot region, but the location and size varied with each EW. The highest Relative Risk (RR) regions in an EW were noticed to contain the primary clusters of the next EW and were found to include stopover sites for migratory wild birds. They were in Fayoum, Dakahlia, Qalyobiya, Sharkia, Kafr_Elsheikh, Giza, Behera, Menia, and BeniSuef governorates. Transmission of HPAI H5N1 occurred from one location to another directly resulted in a series of outbreaks forming neighboring secondary clusters. The absence of geographical borders between the governorates in addition to non-restricted movements of poultry and low vaccination and surveillance coverage contributed to the wider spread of infection all over Egypt and to look like one epidemiological unit. Conclusion Our findings can help in better understanding of the characteristics of HPAI H5N1 outbreaks and the distribution of outbreak risk, which can be used for effective disease control strategies. Graphical abstract ![]()
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Affiliation(s)
- Yumna Elsobky
- Department of Hygiene and Zoonosis, Faculty of Veterinary Medicine, University of Sadat City, Menofia, Sadat City, 32897, Egypt.
| | - Gamal El Afandi
- College of Agriculture, Environment and Nutrition Sciences, Tuskegee University, Tuskegee, AL, USA.,Astronomy and Meteorology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Akram Salama
- Department of Animal Medicine and Infectious Diseases, Faculty of Veterinary Medicine, University of Sadat City, Sadat City, Menofia, 32897, Egypt
| | - Ahmed Byomi
- Department of Hygiene and Zoonosis, Faculty of Veterinary Medicine, University of Sadat City, Menofia, Sadat City, 32897, Egypt
| | - Muhammad Omar
- Department of Biomedical Sciences, College of Veterinary Medicine, Tuskegee University, Tuskegee, AL, USA
| | - Mahmoud Eltholth
- Global Academy of Agriculture and Food Security, The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, UK.,Department of Animal Hygiene and Preventive Medicine, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
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8
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Chauhan RP, Gordon ML. A systematic review of influenza A virus prevalence and transmission dynamics in backyard swine populations globally. Porcine Health Manag 2022; 8:10. [PMID: 35287744 PMCID: PMC8919175 DOI: 10.1186/s40813-022-00251-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/25/2022] [Indexed: 01/01/2023] Open
Abstract
Background Backyard swine farming is critical to generating subsistence and food security in rural and peri-urban households in several developing countries. The objective of this systematic review was to analyze the molecular and serological prevalence of influenza A virus (IAV) in backyard swine populations globally. Results We identified 34 full-text research articles in NCBI-PubMed and Google Scholar databases that have reported IAV sero- and/or virological prevalence in backyard swine up to 11 July 2021. The highest number of studies were reported from Asia (n = 11) followed by North America (n = 10), South America (n = 6), Africa (n = 6), and Europe (n = 1). While the maximum number of studies (44.12%) reported human-to-swine transmission of IAV, swine-to-human (5.88%), poultry-to-swine (5.88%), and wild birds-to-swine (2.94%) transmissions were also reported. An overall higher IAV seroprevalence (18.28%) in backyard swine was detected compared to the virological prevalence (1.32%). The human-origin pandemic A(H1N1)pdm09 virus clade 1A.3.3.2 was the more frequently detected IAV subtype in virological studies (27.27%) than serological studies (18.92%). In addition, the avian-origin highly pathogenic H5N1 and H5N8 viruses were also detected, which further substantiated the evidence of avian–swine interactions in the backyards. Conclusion Human–swine and avian–swine interactions in backyards may transmit IAV between species. Monitoring the circulation and evolution of IAV in backyard swine would help stakeholders make informed decisions to ensure sustainable backyard swine farming and public safety.
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9
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Modirihamedan A, Aghajantabar S, King J, Graaf A, Pohlmann A, Aghaiyan L, Ziafati Kafi Z, Mahfoozi Y, Hosseini H, Beer M, Ghalyanchilangeroudi A, Harder T. Wild bird trade at live poultry markets potentiates risks of avian influenza virus introductions in Iran. Infect Ecol Epidemiol 2021; 11:1992083. [PMID: 34777715 PMCID: PMC8583743 DOI: 10.1080/20008686.2021.1992083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Wild aquatic birds are the main natural host reservoir of avian influenza viruses (AIV). Migratory aquatic birds can translocate AI viruses over wide geographic distances. AIV may be transmitted reciprocally at the wild bird–poultry interface, increasing viral variability and potentially driving the zoonotic potential of these viruses. A cross-sectional study on AIV and several further avian viral pathogens conducted in 396 trapped migratory aquatic birds traded at live bird markets (LBM) in northern Iran identified 11 AIV-positive cases. The 10 identified H9N2 viral sequences fell into wild bird H9 lineage Y439; in addition, an H10N3 virus of Eurasian lineage was detected. Ten samples contained low viral loads of avian coronavirus but could not be further characterized. Although traditional trading of live-trapped wild birds provides income for hunters, particularly during fall migration periods, it increases the risk of introducing new AIV strains from the natural reservoir to poultry kept at LBMs and, potentially, to traders and customers. Banning these birds from poultry trading lines would lower such risks considerably.
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Affiliation(s)
- Amir Modirihamedan
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
| | - Shabnam Aghajantabar
- Department of Avian Medicine, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Jacqueline King
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
| | - Annika Graaf
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
| | - Anne Pohlmann
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
| | - Leila Aghaiyan
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Zahra Ziafati Kafi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Yeganeh Mahfoozi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Hossein Hosseini
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Karaj Branch, Karaj, Iran
| | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
| | - Arash Ghalyanchilangeroudi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Timm Harder
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Germany
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Temporal Dynamics of Influenza A(H5N1) Subtype before and after the Emergence of H5N8. Viruses 2021; 13:v13081565. [PMID: 34452430 PMCID: PMC8412109 DOI: 10.3390/v13081565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 01/10/2023] Open
Abstract
Highly pathogenic avian influenza (HPAI) viruses continue to circulate worldwide, causing numerous outbreaks among bird species and severe public health concerns. H5N1 and H5N8 are the two most fundamental HPAI subtypes detected in birds in the last two decades. The two viruses may compete with each other while sharing the same host population and, thus, suppress the spread of one of the viruses. In this study, we performed a statistical analysis to investigate the temporal correlation of the HPAI H5N1 and HPAI H5N8 subtypes using globally reported data in 2015-2020. This was joined with an in-depth analysis using data generated via our national surveillance program in Egypt. A total of 6412 outbreaks were reported worldwide during this period, with 39% (2529) as H5N1 and 61% (3883) as H5N8. In Egypt, 65% of positive cases were found in backyards, while only 12% were found in farms and 23% in live bird markets. Overall, our findings depict a trade-off between the number of positive H5N1 and H5N8 samples around early 2017, which is suggestive of the potential replacement between the two subtypes. Further research is still required to elucidate the underpinning mechanisms of this competitive dynamic. This, in turn, will implicate the design of effective strategies for disease control.
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11
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El-Moeid AA, EL-Deeb AH, Elsaied MF, Soliman RA, EL-Safty MM, Hussein HA. Discrepancies in the efficacy of H5 inactivated avian influenza vaccines in specific-pathogen-free chickens against challenge with the Egyptian H5N8 clade 2.3.4.4 Group B virus isolated in 2018. Vet World 2021; 14:2131-2141. [PMID: 34566331 PMCID: PMC8448630 DOI: 10.14202/vetworld.2021.2131-2141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/06/2021] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND AND AIM Highly pathogenic avian influenza H5N8 virus of clade 2.3.4.4 was newly emerged to Egypt and firstly detected in carcasses of wild birds in November 2016. This study assessed the protection efficacy and virus shedding reduction of three different inactivated avian influenza (AI) H5 (H5N1, H5N2, and H5N3) commercial vaccines against challenge with two newly emerging highly pathogenic AI virus H5N8 Egyptian isolates in specific-pathogen-free (SPF) chicks. MATERIALS AND METHODS 10-day-old SPF chicks (n=260) were divided into 20 groups (n=13). Groups 1-5 were vaccinated through the subcutaneous route (S/C) with 0.5 mL of H5N1 vaccine, Groups 6-10 were vaccinated (S/C) with 0.5 mL of H5N2 vaccine, and Groups 11-15 were vaccinated (S/C) with 0.5 mL of H5N3 vaccine. Positive control groups (16-19) were challenged at 25 and 31 days old (2 and 3 weeks post-vaccination [PV]) using H5N8 clade 2.3.4.4 A/duck/Egypt/F13666A/2017(H5N8) and H5N8 clade 2.3.4.4 A/chicken/Egypt/18FL6/2018(H5N8). Group 20 was left non-vaccinated as a control. All vaccinated groups were divided and challenged with both viruses at 25 and 31 days of age. The viral challenge dose was 0.1 mL of 106 EID50/0.1 mL titer/chick, and it was administered oronasally. All chicks were kept in isolators for 14 days after each challenge. Sera samples were collected weekly and at 2 weeks post-challenge (PC) to detect a humoral immune response. PC mortalities were recorded daily for 10 days to calculate the protection percentages. Tracheal swabs were collected from the challenged chicks in different groups at 3, 5, 7, and 10 days PC. Kidneys and spleens were collected at 3, 5, 7, and 10 days PC and kept in formalin for histopathological examination to assess lesions and severity scores. Tracheal swabs were inoculated in 10-day-old SPF embryonated chicken eggs for virus titration and to calculate shedding levels. RESULTS All studied vaccines displayed 70-100% protection within 10 days PC. Hemagglutination inhibition results from sera samples revealed antibody titers ranging from 0.6 to 5.4 log2 starting at 1-week PV with the highest titers at 4 weeks PV. Challenged SPF chickens exhibited a notable reduction in virus shedding, with an average of 1.5-2 log10, compared to control birds. Various histopathological lesions with different scores were detected. CONCLUSION Our findings suggest that the inadequate virus shedding reduction and protection efficacy of studied vaccines were variable and that the type of vaccine to be used under field conditions should be reconsidered. Study of the variability between the Egyptian old emerged AI (AIV) 2017 H5N8 strains and the new emerging AIV 2018 H5N8 is required to achieve optimal protection and limit the current economic losses.
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Affiliation(s)
- Amena Abd El-Moeid
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Ayman Hany EL-Deeb
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Marwa Fathy Elsaied
- Central Laboratory for Evaluation of Veterinary Biologics, Abassia, Cairo, Egypt
| | - Reem Ahamed Soliman
- Central Laboratory for Evaluation of Veterinary Biologics, Abassia, Cairo, Egypt
| | | | - Hussein Aly Hussein
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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12
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El-Sayed MM, Arafa AS, Abdelmagid M, Youssef AI. Epidemiological surveillance of H9N2 avian influenza virus infection among chickens in farms and backyards in Egypt 2015-2016. Vet World 2021; 14:949-955. [PMID: 34083945 PMCID: PMC8167522 DOI: 10.14202/vetworld.2021.949-955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 03/02/2021] [Indexed: 11/29/2022] Open
Abstract
Background and Aim: LPAI H9N2 infection among the poultry population in Egypt constitutes an additional risk factor in the poultry industry. This study aimed to determine the prevalence of H9N2 avian influenza virus (AIV) in commercial and backyard chickens in Egypt. A 2-year survey of H9N2 AIV in chickens in farms and backyards was carried out in 2015 and 2016. Materials and Methods: Direct detection of H9N2 AIV was performed by detecting the virus in tracheal and cloacal swabs using real-time polymerase chain reaction assays. A total of 20,421 samples were collected from chickens in farms and backyards in 26 Egyptian governorates. Results: In 2015, cases positive for H9N2 AIV numbered 388 (3.9%) out of 10,016 examined cases. However, in 2016, the total positive cases numbered 447 (4.3%) out of 10,405 examined cases. The prevalence of H9N2 AIV among chickens on commercial farms was 4.6% out of the 16,666 chickens examined. The rates of positive cases in 2015 and 2016 were 4.4% (349/7884) and 4.7% (417/8782), respectively. The prevalence of H9N2 AIV in backyard chickens was 1.8% (69/3755). The rates of positive cases in backyard chickens were 1.8% (39/2132) in 2015 and again 1.8% (30/1623) in 2016. The highest positivity rate of H9N2 in chicken farms was in Beni-Suef (61.5%) (8/13), whereas the highest positivity rate in backyard chickens was in Fayoum (8.2%) (8/97). Conclusion: The analysis of H9N2 infections among chicken farms and in backyard chickens in the different governorates of Egypt over 2 years indicated widespread infection throughout the country. Thus, continuous surveillance and implementation of control programs are warranted.
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Affiliation(s)
- Moataz Mohamed El-Sayed
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, P.O. Box 264, Dokki, Giza 12618, Egypt
| | - Abdel Satar Arafa
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, P.O. Box 264, Dokki, Giza 12618, Egypt
| | - Marwa Abdelmagid
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, P.O. Box 264, Dokki, Giza 12618, Egypt
| | - Ahmed Ibrahim Youssef
- Animal Hygiene and Zoonoses, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
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13
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Mishra J, Mishra P, Arora NK. Linkages between environmental issues and zoonotic diseases: with reference to COVID-19 pandemic. ENVIRONMENTAL SUSTAINABILITY (SINGAPORE) 2021; 4:455-467. [PMID: 38624661 PMCID: PMC8005368 DOI: 10.1007/s42398-021-00165-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/28/2021] [Accepted: 03/02/2021] [Indexed: 05/05/2023]
Abstract
Coronavirus disease (COVID-19) caused by severe acute respiratory syndrome (SARS) coronavirus 2 (SARS-CoV-2) has taken mankind by surprise with various unprecedented impacts on human life around the globe. This zoonotic pandemic is proving to be the most destructive disease outbreaks since decades. The increasing human population and anthropogenic activities have impacted the environment and have direct linkages with the current and other recent outbreaks of zoonotic diseases. Despite having a difference in their origin, major reasons behind the emergence and spread of zoonotic pandemics are related to activities such as habitat fragmentation, deforestation, biodiversity loss, intensive agriculture and livestock farming, uncontrolled urbanization, pollution, climate change and bushmeat hunting and trading. It is important to focus on environmental and climatic factors that are involved in the emergence of such pandemics involving novel human pathogens and viruses in particular. Research and data analysis, particularly in relation to COVID-19, has shown that meteorological factors along with population density and living conditions (particularly in the urban and semi-urban areas) play a crucial role in the intensity, evolution and spread of SARS-CoV-2. This particular virus is novel but coronaviruses have a long history and are known to cause disease outbreaks earlier as well. COVID-19 pandemic provides learning for the future, in particular the importance of environmental sustainability for controlling such outbreaks. A strategic plan can be developed involving policy-makers, organizations, and governments to control the onset and spread of the novel pathogens. This review-based study recommends that prevention of COVID-19 like pandemics from re-occurring is through tackling the issues related to the environment by controlling anthropogenic activities. It will also be important to track the lineage and future evolution course of such human pathogens so as to determine the nexus of environmental and biological factors in the development and spread of novel strains.
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Affiliation(s)
- Jitendra Mishra
- Department of Environmental Science, School for Earth and Environmental Sciences, Babasaheb Bhimrao Ambedkar (Central) University, Lucknow, 226025 India
| | - Priya Mishra
- Department of Environmental Science, School for Earth and Environmental Sciences, Babasaheb Bhimrao Ambedkar (Central) University, Lucknow, 226025 India
| | - Naveen Kumar Arora
- Department of Environmental Science, School for Earth and Environmental Sciences, Babasaheb Bhimrao Ambedkar (Central) University, Lucknow, 226025 India
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14
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Hill NJ, Smith LM, Muzaffar SB, Nagel JL, Prosser DJ, Sullivan JD, Spragens KA, DeMattos CA, DeMattos CC, El Sayed L, Erciyas-Yavuz K, Davis CT, Jones J, Kis Z, Donis RO, Newman S H, Takekawa JY. Crossroads of highly pathogenic H5N1: overlap between wild and domestic birds in the Black Sea-Mediterranean impacts global transmission. Virus Evol 2021; 7:veaa093. [PMID: 34956648 PMCID: PMC7947991 DOI: 10.1093/ve/veaa093] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Understanding transmission dynamics that link wild and domestic animals is a key element of predicting the emergence of infectious disease, an event that has highest likelihood of occurring wherever human livelihoods depend on agriculture and animal trade. Contact between poultry and wild birds is a key driver of the emergence of highly pathogenic avian influenza (HPAI), a process that allows for host switching and accelerated reassortment, diversification, and spread of virus between otherwise unconnected regions. This study addresses questions relevant to the spillover of HPAI at a transmission hotspot: what is the nature of the wild bird-poultry interface in Egypt and adjacent Black Sea-Mediterranean countries and how has this contributed to outbreaks occurring worldwide? Using a spatiotemporal model of infection risk informed by satellite tracking of waterfowl and viral phylogenetics, this study identified ecological conditions that contribute to spillover in this understudied region. Results indicated that multiple ducks (Northern Shoveler and Northern Pintail) hosted segments that shared ancestry with HPAI H5 from both clade 2.2.1 and clade 2.3.4 supporting the role of Anseriformes in linking viral populations in East Asia and Africa over large distances. Quantifying the overlap between wild ducks and H5N1-infected poultry revealed an increasing interface in late winter peaking in early spring when ducks expanded their range before migration, with key differences in the timing of poultry contact risk between local and long-distance migrants.
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Affiliation(s)
- Nichola J Hill
- Tufts University, Department of Infectious Disease & Global Health, 200 Westboro Rd, North Grafton, MA 01536, USA
- U.S. Geological Survey, 505 Azuar Drive, Vallejo, CA 94592, USA
| | - Lacy M Smith
- U.S. Geological Survey, 505 Azuar Drive, Vallejo, CA 94592, USA
| | - Sabir B Muzaffar
- U.S. Geological Survey, 505 Azuar Drive, Vallejo, CA 94592, USA
- United Arab Emirates University, Department of Biology, PO Box 15551, Al Ain, United Arab Emirates
| | - Jessica L Nagel
- Natural Systems Analysts, 201 West Canton Ave, Winter Park, FL 32790, USA
| | - Diann J Prosser
- U.S. Geological Survey, Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, MD 20708, USA
| | - Jeffery D Sullivan
- U.S. Geological Survey, Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, MD 20708, USA
| | - Kyle A Spragens
- U.S. Geological Survey, 505 Azuar Drive, Vallejo, CA 94592, USA
- Washington Department of Fish & Wildlife, P.O. Box 43141, Olympia, WA 98501, USA
| | - Carlos A DeMattos
- U.S. Naval Medical Research Unit No. 3, 1a Etisalat Club Rd, Ezbet Fahmy, El Basatin Cairo, 11435, Egypt
| | - Cecilia C DeMattos
- U.S. Naval Medical Research Unit No. 3, 1a Etisalat Club Rd, Ezbet Fahmy, El Basatin Cairo, 11435, Egypt
| | - Lu’ay El Sayed
- Egyptian Environmental Affairs Agency, 30 Misr Helwan El-Zyrae Road, Maadi, Cairo, 11728, Egypt
| | | | - C Todd Davis
- Centers for Disease Control and Prevention, 1600 Clifton Rd Atlanta, GA 30333, USA
| | - Joyce Jones
- Centers for Disease Control and Prevention, 1600 Clifton Rd Atlanta, GA 30333, USA
| | - Zoltan Kis
- Centers for Disease Control and Prevention, 1600 Clifton Rd Atlanta, GA 30333, USA
| | - Ruben O Donis
- Centers for Disease Control and Prevention, 1600 Clifton Rd Atlanta, GA 30333, USA
| | - Scott H Newman
- Food & Agriculture Organization of the United Nations, Liberia Rd, Accra, Ghana
| | - John Y Takekawa
- U.S. Geological Survey, 505 Azuar Drive, Vallejo, CA 94592, USA
- Suisun Resource Conservation District, 2544 Grizzly Island Road, Suisun City, CA 94585, USA
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15
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Detection of Novel Goose Parvovirus Disease Associated with Short Beak and Dwarfism Syndrome in Commercial Ducks. Animals (Basel) 2020; 10:ani10101833. [PMID: 33050105 PMCID: PMC7600095 DOI: 10.3390/ani10101833] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/19/2020] [Accepted: 09/29/2020] [Indexed: 12/02/2022] Open
Abstract
Simple Summary Duck short beak and dwarfism syndrome is an emerging infectious disease caused by a novel goose parvovirus that has been detected in Europe and China since 1974. Low performance, slow growth and deaths of young ducklings were the main characteristics of the disease. To the best of our knowledge, such syndrome has not been recorded in Egypt, but since 2019, it was observed in some mule and pekin duck farms that resulted in drastic economic losses for waterfowl producers. Identification of the causative agent through viral and molecular detection of the causative virus was the aim of this study. Also, gene sequence of one of three viral protein genes which are responsible for the virulence was accomplished. The causative virus was isolated on primary cell culture, with partial gene sequence of viral VP1 gene that indicated the viral clustering with Chinese novel goose parvoviruses that may help in new vaccine manufacturing and development of a more sensitive diagnostic assay. Future studies to evaluate potential protection of an available market vaccine against the novel virus will be useful. Abstract Derzsy’s disease causes disastrous losses in domestic waterfowl farms. A genetically variant strain of Muscovy duck parvovirus (MDPV) and goose parvovirus (GPV) was named novel goose parvovirus (NGPV), which causes characteristic syndrome in young ducklings. The syndrome was clinically characterized by deformity in beaks and retarded growth, called short beaks and dwarfism syndrome (SBDS). Ten mule and pekin duck farms were investigated for parvovirus in three Egyptian provinces. Despite low recorded mortality rate (20%), morbidity rate was high (70%), but the economic losses were remarkable as a result of retarded growth and low performance. Isolation of NGPV was successful on primary cell culture of embryonated duck liver cells with a clear cytopathic effect. Partial gene sequence of the VP1 gene showed high amino acids identity among isolated strains and close identity with Chinese strains of NGPV, and low identity with classic GPV and MDPV strains. To the best of our knowledge, this can be considered the first record of NGPV infections in Egypt.
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16
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Ayala AJ, Yabsley MJ, Hernandez SM. A Review of Pathogen Transmission at the Backyard Chicken-Wild Bird Interface. Front Vet Sci 2020; 7:539925. [PMID: 33195512 PMCID: PMC7541960 DOI: 10.3389/fvets.2020.539925] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 08/13/2020] [Indexed: 01/31/2023] Open
Abstract
Habitat conversion and the expansion of domesticated, invasive species into native habitats are increasingly recognized as drivers of pathogen emergence at the agricultural-wildlife interface. Poultry agriculture is one of the largest subsets of this interface, and pathogen spillover events between backyard chickens and wild birds are becoming more commonly reported. Native wild bird species are under numerous anthropogenic pressures, but the risks of pathogen spillover from domestic chickens have been historically underappreciated as a threat to wild birds. Now that the backyard chicken industry is one of the fastest growing industries in the world, it is imperative that the principles of biosecurity, specifically bioexclusion and biocontainment, are legislated and implemented. We reviewed the literature on spillover events of pathogens historically associated with poultry into wild birds. We also reviewed the reasons for biosecurity failures in backyard flocks that lead to those spillover events and provide recommendations for current and future backyard flock owners.
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Affiliation(s)
- Andrea J. Ayala
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, United States
| | - Michael J. Yabsley
- Daniel B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States
- Southeastern Cooperative Wildlife Disease Study, Athens, GA, United States
| | - Sonia M. Hernandez
- Daniel B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, United States
- Southeastern Cooperative Wildlife Disease Study, Athens, GA, United States
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17
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Mostafa A, Mahmoud SH, Shehata M, Müller C, Kandeil A, El-Shesheny R, Nooh HZ, Kayali G, Ali MA, Pleschka S. PA from a Recent H9N2 (G1-Like) Avian Influenza a Virus (AIV) Strain Carrying Lysine 367 Confers Altered Replication Efficiency and Pathogenicity to Contemporaneous H5N1 in Mammalian Systems. Viruses 2020; 12:v12091046. [PMID: 32962203 PMCID: PMC7551781 DOI: 10.3390/v12091046] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 12/03/2022] Open
Abstract
Egypt is a hotspot for H5- and H9-subtype avian influenza A virus (AIV) infections and co-infections in poultry by both subtypes have been frequently reported. However, natural genetic reassortment of these subtypes has not been reported yet. Here, we evaluated the genetic compatibility and replication efficiency of reassortants between recent isolates of an Egyptian H5N1 and a H9N2 AIV (H5N1EGY and H9N2EGY). All internal viral proteins-encoding segments of the contemporaneous G1-like H9N2EGY, expressed individually and in combination in the genetic background of H5N1EGY, were genetically compatible with the other H5N1EGY segments. At 37 °C the replication efficiencies of H5N1EGY reassortants expressing the H9N2EGY polymerase subunits PB2 and PA (H5N1PB2-H9N2EGY, H5N1PA-H9N2EGY) were higher than the wild-type H5N1EGY in Madin-Darby canine kidney (MDCK-II) cells. This could not be correlated to viral polymerase activity as this was found to be improved for H5N1PB2-H9N2EGY, but reduced for H5N1PA-H9N2EGY. At 33 °C and 39 °C, H5N1PB2-H9N2EGY and H5N1PA-H9N2EGY replicated to higher levels than the wild-type H5N1EGY in human Calu-3 and A549 cell lines. Nevertheless, in BALB/c mice both reassortants caused reduced mortality compared to the wild-type H5N1EGY. Genetic analysis of the polymerase-encoding segments revealed that the PAH9N2EGY and PB2H9N2EGY encode for a distinct uncharacterized mammalian-like variation (367K) and a well-known mammalian signature (591K), respectively. Introducing the single substitution 367K into the PA of H5N1EGY enabled the mutant virus H5N1PA-R367K to replicate more efficiently at 37 °C in primary human bronchial epithelial (NHBE) cells and also in A549 and Calu-3 cells at 33 °C and 39 °C. Furthermore, H5N1PA-R367K caused higher mortality in BALB/c mice. These findings demonstrate that H5N1 (Clade 2.2.1.2) reassortants carrying internal proteins-encoding segments of G1-like H9N2 viruses can emerge and may gain improved replication fitness. Thereby such H5N1/H9N2 reassortants could augment the zoonotic potential of H5N1 viruses, especially by acquiring unique mammalian-like aa signatures.
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Affiliation(s)
- Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
- Institute of Medical Virology, Justus Liebig University Giessen, Schubertstrasse 81, 35390 Giessen, Germany;
- Correspondence: (A.M); (M.A.A.); (S.P.)
| | - Sara H. Mahmoud
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
| | - Mahmoud Shehata
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
| | - Christin Müller
- Institute of Medical Virology, Justus Liebig University Giessen, Schubertstrasse 81, 35390 Giessen, Germany;
| | - Ahmed Kandeil
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
| | - Rabeh El-Shesheny
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
- St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Hanaa Z. Nooh
- Anatomy and Embryology Department, Faculty of Medicine, Jouf University, Sakaka 2014, Saudi Arabia;
| | - Ghazi Kayali
- Department of Epidemiology, Human Genetics, and Environmental Sciences, University of Texas, Houston, TX 77030, USA;
- Human Link, Baabda 1109, Lebanon
| | - Mohamed A. Ali
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), 12622 Giza, Egypt; (S.H.M.); (M.S.); (A.K.); (R.E.-S.)
- Correspondence: (A.M); (M.A.A.); (S.P.)
| | - Stephan Pleschka
- Institute of Medical Virology, Justus Liebig University Giessen, Schubertstrasse 81, 35390 Giessen, Germany;
- Correspondence: (A.M); (M.A.A.); (S.P.)
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18
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Kalonda A, Saasa N, Nkhoma P, Kajihara M, Sawa H, Takada A, Simulundu E. Avian Influenza Viruses Detected in Birds in Sub-Saharan Africa: A Systematic Review. Viruses 2020; 12:v12090993. [PMID: 32906666 PMCID: PMC7552061 DOI: 10.3390/v12090993] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/03/2020] [Accepted: 09/05/2020] [Indexed: 12/20/2022] Open
Abstract
In the recent past, sub-Saharan Africa has not escaped the devastating effects of avian influenza virus (AIV) in poultry and wild birds. This systematic review describes the prevalence, spatiotemporal distribution, and virus subtypes detected in domestic and wild birds for the past two decades (2000–2019). We collected data from three electronic databases, PubMed, SpringerLink electronic journals and African Journals Online, using the Preferred Reporting Items for Systematic reviews and Meta-Analyses protocol. A total of 1656 articles were reviewed, from which 68 were selected. An overall prevalence of 3.0% AIV in birds was observed. The prevalence varied between regions and ranged from 1.1% to 7.1%. The Kruskal–Wallis and Wilcoxon signed-rank sum test showed no significant difference in the prevalence of AIV across regions, χ2(3) = 5.237, p = 0.1553 and seasons, T = 820, z = −1.244, p = 0.2136. Nineteen hemagglutinin/neuraminidase subtype combinations were detected during the reviewed period, with southern Africa recording more diverse AIV subtypes than other regions. The most detected subtype was H5N1, followed by H9N2, H5N2, H5N8 and H6N2. Whilst these predominant subtypes were mostly detected in domestic poultry, H1N6, H3N6, H4N6, H4N8, H9N1 and H11N9 were exclusively detected in wild birds. Meanwhile, H5N1, H5N2 and H5N8 were detected in both wild and domestic birds suggesting circulation of these subtypes among wild and domestic birds. Our findings provide critical information on the eco-epidemiology of AIVs that can be used to improve surveillance strategies for the prevention and control of avian influenza in sub-Saharan Africa.
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Affiliation(s)
- Annie Kalonda
- Department of Biomedical Sciences, School of Health Sciences, University of Zambia, Lusaka 10101, Zambia; (A.K.); (P.N.)
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka 10101, Zambia; (N.S.); (H.S.); (A.T.)
- Africa Centre of Excellence for Infectious Disease of Humans and Animals, School of Veterinary Medicine, Lusaka 10101, Zambia
| | - Ngonda Saasa
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka 10101, Zambia; (N.S.); (H.S.); (A.T.)
| | - Panji Nkhoma
- Department of Biomedical Sciences, School of Health Sciences, University of Zambia, Lusaka 10101, Zambia; (A.K.); (P.N.)
| | - Masahiro Kajihara
- Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan;
| | - Hirofumi Sawa
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka 10101, Zambia; (N.S.); (H.S.); (A.T.)
- Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan;
| | - Ayato Takada
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka 10101, Zambia; (N.S.); (H.S.); (A.T.)
- Research Center for Zoonosis Control, Hokkaido University, Sapporo 001-0020, Japan;
- Global Station for Zoonosis Control, Global Institution for Collaborative Research and Education (GI-CoRE), Hokkaido University Kita-ku, Sapporo 001-0020, Japan
| | - Edgar Simulundu
- Department of Disease Control, School of Veterinary Medicine, University of Zambia, Lusaka 10101, Zambia; (N.S.); (H.S.); (A.T.)
- Macha Research Trust, Choma 20100, Zambia
- Correspondence: ; Tel.: +260-977469479
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19
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Chauhan RP, Gordon ML. A Systematic Review Analyzing the Prevalence and Circulation of Influenza Viruses in Swine Population Worldwide. Pathogens 2020; 9:pathogens9050355. [PMID: 32397138 PMCID: PMC7281378 DOI: 10.3390/pathogens9050355] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/02/2020] [Accepted: 04/09/2020] [Indexed: 01/04/2023] Open
Abstract
The global anxiety and a significant threat to public health due to the current COVID-19 pandemic reiterate the need for active surveillance for the zoonotic virus diseases of pandemic potential. Influenza virus due to its wide host range and zoonotic potential poses such a significant threat to public health. Swine serve as a “mixing vessel” for influenza virus reassortment and evolution which as a result may facilitate the emergence of new strains or subtypes of zoonotic potential. In this context, the currently available scientific data hold a high significance to unravel influenza virus epidemiology and evolution. With this objective, the current systematic review summarizes the original research articles and case reports of all the four types of influenza viruses reported in swine populations worldwide. A total of 281 articles were found eligible through screening of PubMed and Google Scholar databases and hence were included in this systematic review. The highest number of research articles (n = 107) were reported from Asia, followed by Americas (n = 97), Europe (n = 55), Africa (n = 18), and Australia (n = 4). The H1N1, H1N2, H3N2, and A(H1N1)pdm09 viruses were the most common influenza A virus subtypes reported in swine in most countries across the globe, however, few strains of influenza B, C, and D viruses were also reported in certain countries. Multiple reports of the avian influenza virus strains documented in the last two decades in swine in China, the United States, Canada, South Korea, Nigeria, and Egypt provided the evidence of interspecies transmission of influenza viruses from birds to swine. Inter-species transmission of equine influenza virus H3N8 from horse to swine in China expanded the genetic diversity of swine influenza viruses. Additionally, numerous reports of the double and triple-reassortant strains which emerged due to reassortments among avian, human, and swine strains within swine further increased the genetic diversity of swine influenza viruses. These findings are alarming hence active surveillance should be in place to prevent future influenza pandemics.
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20
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Nabil NM, Erfan AM, Tawakol MM, Haggag NM, Naguib MM, Samy A. Wild Birds in Live Birds Markets: Potential Reservoirs of Enzootic Avian Influenza Viruses and Antimicrobial Resistant Enterobacteriaceae in Northern Egypt. Pathogens 2020; 9:pathogens9030196. [PMID: 32155863 PMCID: PMC7157678 DOI: 10.3390/pathogens9030196] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 12/20/2022] Open
Abstract
Wild migratory birds are often implicated in the introduction, maintenance, and global dissemination of different pathogens, such as influenza A viruses (IAV) and antimicrobial-resistant (AMR) bacteria. Trapping of migratory birds during their resting periods at the northern coast of Egypt is a common and ancient practice performed mainly for selling in live bird markets (LBM). In the present study, samples were collected from 148 wild birds, representing 14 species, which were being offered for sale in LBM. All birds were tested for the presence of AIV and enterobacteriaceae. Ten samples collected from Northern Shoveler birds (Spatula clypeata) were positive for IAV and PCR sub-typing and pan HA/NA sequencing assays detected H5N8, H9N2, and H6N2 viruses in four, four, and one birds, respectively. Sequencing of the full haemagglutinin (HA) gene revealed a high similarity with currently circulating IAV in Egypt. From all the birds, E.coli was recovered from 37.2% and Salmonella from 20.2%, with 66%-96% and 23%-43% isolates being resistant to at least one of seven selected critically important antimicrobials (CIA), respectively. The presence of enzootic IAV and the wide prevalence of AMR enterobacteriaceae in wild birds highlight the potential role of LBM in the spread of different pathogens from and to wild birds. Continued surveillance of both AIV and antimicrobial-resistant enterobacteriaceae in wild birds' habitats is urgently needed.
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Affiliation(s)
- Nehal M. Nabil
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
| | - Ahmed M. Erfan
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
| | - Maram M. Tawakol
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
| | - Naglaa M. Haggag
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
| | - Mahmoud M. Naguib
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
- Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala SE-75185, Sweden
| | - Ahmed Samy
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt; (N.M.N.); (A.M.E.); (M.M.T.); (N.M.H.); (M.M.N.)
- Immunogenetics, The Pirbright Institute, Surrey GU24 0NF, UK
- Correspondence: or
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21
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Matilda AA, Juergen M, Krumkamp R, Timm H, Eva M. Molecular and serological prevalence of influenza A viruses in poultry and poultry farmers in the Ashanti region, Ghana. Infect Ecol Epidemiol 2019; 9:1698904. [PMID: 32002146 PMCID: PMC6968574 DOI: 10.1080/20008686.2019.1698904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 11/15/2019] [Indexed: 12/18/2022] Open
Abstract
For an analysis of the prevalence of influenza A viruses (IAVs) circulating in chickens and their farmers in the Ashanti region, Ghana, we examined 2,400 trachea and cloaca swabs (chickens) and 102 oropharyngeal swabs (farmers) by qRT-PCR. Sera from 1,200 (chickens) and 102 (farmers) were analysed for IAV antibodies by ELISA and haemagglutination inhibition (HI). Avian influenza virus (AIV) was detected in 0.2% (n = 5) of chickens but not farmers. Virus detection was more pronounced in the cloacal (n = 4, 0.3%) than in tracheal swabs (n = 1, 0.1%). AIV antibodies were not detected in chickens. Two farmers (2.0%) tested positive to human seasonal IAV H1N1pdm09. Sixteen (15.7%) farmers tested seropositive to IAV of which 68.8% (n = 11) were due to H1N1pdm09-specific antibodies. AIV H5- or H7-specific antibodies were not detected in the farmers. Questionnaire evaluation indicated the rare usage of basic personal protective equipment by farmers when handling poultry. In light of previous outbreaks of zoonotic AIV in poultry in Ghana the open human-animal interface raises concern from a OneHealth perspective and calls for continued targeted surveillance.
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Affiliation(s)
- Ayim-Akonor Matilda
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,Department of Animal Health and Food safety, Council for Scientific and Industrial Research-Animal Research Institute, Accra, Ghana
| | - May Juergen
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Ralf Krumkamp
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Harder Timm
- Friedrich-Loeffler-Institut, Institute for Diagnostic Virology, Insel Riems, Germany
| | - Mertens Eva
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
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22
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Disentangling the role of Africa in the global spread of H5 highly pathogenic avian influenza. Nat Commun 2019; 10:5310. [PMID: 31757953 PMCID: PMC6874648 DOI: 10.1038/s41467-019-13287-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 10/08/2019] [Indexed: 12/30/2022] Open
Abstract
The role of Africa in the dynamics of the global spread of a zoonotic and economically-important virus, such as the highly pathogenic avian influenza (HPAI) H5Nx of the Gs/GD lineage, remains unexplored. Here we characterise the spatiotemporal patterns of virus diffusion during three HPAI H5Nx intercontinental epidemic waves and demonstrate that Africa mainly acted as an ecological sink of the HPAI H5Nx viruses. A joint analysis of host dynamics and continuous spatial diffusion indicates that poultry trade as well as wild bird migrations have contributed to the virus spreading into Africa, with West Africa acting as a crucial hotspot for virus introduction and dissemination into the continent. We demonstrate varying paths of avian influenza incursions into Africa as well as virus spread within Africa over time, which reveal that virus expansion is a complex phenomenon, shaped by an intricate interplay between avian host ecology, virus characteristics and environmental variables.
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23
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Samir A, Adel A, Arafa A, Sultan H, Hussein Ahmed HA. Molecular pathogenic and host range determinants of reassortant Egyptian low pathogenic avian influenza H9N2 viruses from backyard chicken. Int J Vet Sci Med 2019; 7:10-19. [PMID: 31620483 PMCID: PMC6776986 DOI: 10.1080/23144599.2019.1637046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 06/10/2019] [Accepted: 06/13/2019] [Indexed: 01/19/2023] Open
Abstract
Since the introduction of H9N2 low pathogenic avian influenza virus in Egypt, it became an endemic disease causing considerable economic losses in different poultry sectors especially in the presence of other secondary bacterial and viral infections. The H9N2 viruses in Egypt are in continuous evolution that needs deep analysis for their evolution pattern based on the genetic constitutions of the pathogenic determinant genes (HA, PB2, PB1, PA, and NS). In this work, samples were collected from the backyard chickens from 3 Egyptian governorates. Five selected viruses were sequenced and analyzed for the hemagglutinin gene which showed genetic relatedness to the Asian G1 lineage group B, similar to the circulating H9N2 viruses in Egypt since 2013. The sequence for PB2, PB1, PA, HA and NS genes of the selected five viruses indicate a natural re-assortment event with recent Eurasian subtypes and similar to Egyptian H9N2 virus isolated from pigeon in Egypt during 2014. The Egyptian viruses of our study possess amino acids signatures including S42, V127, L550, L672 and V504 in the internal genes NS1, PA, and PB2, of respectively of an impact on virus transmission and replication. This work indicates that the H9N2 is in continuous evolution with alarming to the reassortment occurrence.
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Affiliation(s)
- Abdelhafez Samir
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
| | - Amany Adel
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
| | - Abdelsatar Arafa
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
| | - Hesham Sultan
- Avian and Rabbit Diseases Dept., Faculty of Veterinary Medicine, University of Sadat, City Sadat, Minoufiya, Egypt
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