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Youk S, Leyson CM, Parris DJ, Kariithi HM, Suarez DL, Pantin-Jackwood MJ. Phylogenetic analysis, molecular changes, and adaptation to chickens of Mexican lineage H5N2 low-pathogenic avian influenza viruses from 1994 to 2019. Transbound Emerg Dis 2022; 69:e1445-e1459. [PMID: 35150205 PMCID: PMC9365891 DOI: 10.1111/tbed.14476] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/08/2022] [Accepted: 02/08/2022] [Indexed: 11/29/2022]
Abstract
The Mexican lineage H5N2 low pathogenic avian influenza viruses (LPAIVs) were first detected in 1994 and mutated to highly pathogenic avian influenza viruses (HPAIVs) in 1994-1995 causing widespread outbreaks in poultry. By using vaccination and other control measures, the HPAIVs were eradicated but the LPAIVs continued circulating in Mexico and spread to several other countries. To get better resolution of the phylogenetics of this virus, the full genome sequences of 44 H5N2 LPAIVs isolated from 1994 to 2011, and 6 detected in 2017 and 2019, were analysed. Phylogenetic incongruence demonstrated genetic reassortment between two separate groups of the Mexican lineage H5N2 viruses between 2005 and 2010. Moreover, the recent H5N2 viruses reassorted with previously unidentified avian influenza viruses. Bayesian phylogeographic results suggested that mechanical transmission involving human activity is the most probable cause of the virus spillover to Central American, Caribbean, and East Asian countries. Increased infectivity and transmission of a 2011 H5N2 LPAIV in chickens compared to a 1994 virus demonstrates improved adaptation to chickens, while low virus shedding, and limited contact transmission was observed in mallards with the same 2011 virus. The sporadic increase in basic amino acids in the HA cleavage site, changes in potential N-glycosylation sites in the HA, and truncations of PB1-F2 should be further examined in relation to the increased infectivity and transmission in poultry. The genetic changes that occur as this lineage of H5N2 LPAIVs continues circulating in poultry is concerning not only because of the effect of these changes on vaccination efficacy, but also because of the potential of the viruses to mutate to the highly pathogenic form. Continued vigilance and surveillance efforts, and the pathogenic and genetic characterization of circulating viruses, are required for the effective control of this virus.
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Affiliation(s)
- Sungsu Youk
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
| | - Christina M. Leyson
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
| | - Darren J. Parris
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
| | - Henry M. Kariithi
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
- Biotechnology Research Centre, Kenya Agricultural and Livestock Research Organization, Nairobi, Kenya
| | - David L. Suarez
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
| | - Mary J. Pantin-Jackwood
- Exotic and Emerging Avian Diseases Unit, Southeast Poultry Research Laboratory, United States National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture
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Gainor K, Ghosh S. A comprehensive review of viruses in terrestrial animals from the Caribbean islands of Greater and Lesser Antilles. Transbound Emerg Dis 2022; 69:e1299-e1325. [PMID: 35578793 DOI: 10.1111/tbed.14595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/09/2022] [Accepted: 05/09/2022] [Indexed: 11/26/2022]
Abstract
Viruses pose a major threat to animal health worldwide, causing significant mortalities and morbidities in livestock, companion animals and wildlife, with adverse implications on human health, livelihoods, food safety and security, regional/national economies, and biodiversity. The Greater and Lesser Antilles consist of a cluster of islands between the North and South Americas and is habitat to a wide variety of animal species. This review is the first to put together decades of information on different viruses circulating in companion animals, livestock, and wildlife from the Caribbean islands of Greater and Lesser Antilles. Although animal viral diseases have been documented in the Caribbean region since the 1940s, we found that studies on different animal viruses are limited, inconsistent, and scattered. Furthermore, a significant number of the reports were based on serological assays, yielding preliminary data. The available information was assessed to identify knowledge gaps and limitations, and accordingly, recommendations were made, with the overall goal to improve animal health and production, and combat zoonoses in the region. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Kerry Gainor
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, St. Kitts, West Indies
| | - Souvik Ghosh
- Department of Biomedical Sciences, Ross University School of Veterinary Medicine, St. Kitts, West Indies
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Xu W, Navarro-López R, Solis-Hernandez M, Liljehult-Fuentes F, Molina-Montiel M, Lagunas-Ayala M, Rocha-Martinez M, Ferrara-Tijera E, Pérez de la Rosa J, Berhane Y. Evolutionary Dynamics of Mexican Lineage H5N2 Avian Influenza Viruses. Viruses 2022; 14:v14050958. [PMID: 35632700 PMCID: PMC9146523 DOI: 10.3390/v14050958] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022] Open
Abstract
We have demonstrated for the first time a comprehensive evolutionary analysis of the Mexican lineage H5N2 avian influenza virus (AIV) using complete genome sequences (n = 189), from its first isolation in 1993 until 2019. Our study showed that the Mexican lineage H5N2 AIV originated from the North American wild bird gene pool viruses around 1990 and is currently circulating in poultry populations of Mexico, the Dominican Republic, and Taiwan. Since the implementation of vaccination in 1995, the highly pathogenic AIV (HPAIV) H5N2 virus was eradicated from Mexican poultry in mid-1995. However, the low pathogenic AIV (LPAIV) H5N2 virus has continued to circulate in domestic poultry populations in Mexico, eventually evolving into five distinct clades. In the current study, we demonstrate that the evolution of Mexican lineage H5N2 AIVs involves gene reassortments and mutations gained over time. The current circulating Mexican lineage H5N2 AIVs are classified as LPAIV based on the amino acid sequences of the hemagglutinin (HA) protein cleavage site motif as well as the results of the intravenous pathogenicity index (IVPI). The immune pressure from vaccinations most likely has played a significant role in the positive selection of antigenic drift mutants within the Mexican H5N2 AIVs. Most of the identified substitutions in these viruses are located on the critical antigenic residues of the HA protein and as a result, might have contributed to vaccine failures. This study highlights and stresses the need for vaccine updates while emphasizing the importance of continued molecular monitoring of the HA protein for its antigenic changes compared to the vaccines used.
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Affiliation(s)
- Wanhong Xu
- National Centre for Foreign Animal Disease, Winnipeg, MB R3E 3M4, Canada;
| | - Roberto Navarro-López
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - Mario Solis-Hernandez
- United States-Mexico Commission for the Prevention of Foot-and-Mouth Disease and Other Exotic Diseases of Animals, Mexico City 64590, Mexico; (M.S.-H.); (F.L.-F.)
| | - Francisco Liljehult-Fuentes
- United States-Mexico Commission for the Prevention of Foot-and-Mouth Disease and Other Exotic Diseases of Animals, Mexico City 64590, Mexico; (M.S.-H.); (F.L.-F.)
| | - Miguel Molina-Montiel
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - María Lagunas-Ayala
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - Marisol Rocha-Martinez
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - Eduardo Ferrara-Tijera
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - Juan Pérez de la Rosa
- Animal Health General Directorate, Animal and Plant Health, Food Inspection and Food Safety National Services (SENASICA), Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), Mexico City 06470, Mexico; (R.N.-L.); (M.M.-M.); (M.L.-A.); (M.R.-M.); (E.F.-T.); (J.P.d.l.R.)
| | - Yohannes Berhane
- National Centre for Foreign Animal Disease, Winnipeg, MB R3E 3M4, Canada;
- Department of Animal Science, University of Manitoba, Winnipeg, MB R3T 2S2, Canada
- Correspondence: ; Tel.: +1-204-789-7062
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