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Soudani S, Mafi A, Al Mayahi Z, Al Balushi S, Dbaibo G, Al Awaidy S, Amiche A. A Systematic Review of Influenza Epidemiology and Surveillance in the Eastern Mediterranean and North African Region. Infect Dis Ther 2022; 11:15-52. [PMID: 34997913 PMCID: PMC8742167 DOI: 10.1007/s40121-021-00534-3] [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: 06/11/2021] [Accepted: 08/27/2021] [Indexed: 11/24/2022] Open
Abstract
Seasonal influenza represents a huge health burden, resulting in significant mortality and morbidity. Following the 2009 H1N1 pandemic, focus has been directed on the burden of influenza globally. Country and regional disease burden estimates play important roles in helping inform decisions on national influenza intervention programmes. Despite improvements in influenza surveillance following the 2009 pandemic, many opportunities remain unexplored in the Eastern Mediterranean and North African (EMNA) region, which has a high prevalence of patients with chronic disease and thus a population at high risk of influenza complications. We conducted a systematic literature review of Embase, Medline, Scopus and the Cochrane Database of Systematic Reviews from 1 January 1998 to 31 January 2020 covering the EMNA region with the aim to describe the epidemiology of influenza in the region and assess the influenza epidemiological surveillance research landscape. Relevant data on study characteristics, population, clinical/virology characteristics and epidemiology were extracted and summarised descriptively. Of the 112 studies identified for inclusion, 90 were conducted in the Eastern Mediterranean region, 19 in North Africa and three across the EMNA region. Data were reported on 314,058 laboratory-confirmed influenza cases, 96 of which were derived from surveillance systems. Amongst the surveillance studies, the percentage of positive cases reported ranged from 1% to 100%. The predominantly identified influenza strain was strain A; H1N1 was the most prominent circulating subtype. Typing was performed in approximately 75% and subtyping in 50% of studies, respectively. Data on those considered most at risk for influenza complications were collected in 21% of studies, highlighting a regional gap for these data. Our review reveals existing gaps in regional estimates of influenza health and economic burden, hospitalisation rates and duration, and highlights the need for robust and high-quality epidemiology data to help inform public health interventions.
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Affiliation(s)
| | | | | | | | - Ghassan Dbaibo
- Center for Infectious Diseases Research, American University of Beirut, Beirut, Lebanon
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Singh RK, Dhama K, Karthik K, Khandia R, Munjal A, Khurana SK, Chakraborty S, Malik YS, Virmani N, Singh R, Tripathi BN, Munir M, van der Kolk JH. A Comprehensive Review on Equine Influenza Virus: Etiology, Epidemiology, Pathobiology, Advances in Developing Diagnostics, Vaccines, and Control Strategies. Front Microbiol 2018; 9:1941. [PMID: 30237788 PMCID: PMC6135912 DOI: 10.3389/fmicb.2018.01941] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 07/31/2018] [Indexed: 01/23/2023] Open
Abstract
Among all the emerging and re-emerging animal diseases, influenza group is the prototype member associated with severe respiratory infections in wide host species. Wherein, Equine influenza (EI) is the main cause of respiratory illness in equines across globe and is caused by equine influenza A virus (EIV-A) which has impacted the equine industry internationally due to high morbidity and marginal morality. The virus transmits easily by direct contact and inhalation making its spread global and leaving only limited areas untouched. Hitherto reports confirm that this virus crosses the species barriers and found to affect canines and few other animal species (cat and camel). EIV is continuously evolving with changes at the amino acid level wreaking the control program a tedious task. Until now, no natural EI origin infections have been reported explicitly in humans. Recent advances in the diagnostics have led to efficient surveillance and rapid detection of EIV infections at the onset of outbreaks. Incessant surveillance programs will aid in opting a better control strategy for this virus by updating the circulating vaccine strains. Recurrent vaccination failures against this virus due to antigenic drift and shift have been disappointing, however better understanding of the virus pathogenesis would make it easier to design effective vaccines predominantly targeting the conserved epitopes (HA glycoprotein). Additionally, the cold adapted and canarypox vectored vaccines are proving effective in ceasing the severity of disease. Furthermore, better understanding of its genetics and molecular biology will help in estimating the rate of evolution and occurrence of pandemics in future. Here, we highlight the advances occurred in understanding the etiology, epidemiology and pathobiology of EIV and a special focus is on designing and developing effective diagnostics, vaccines and control strategies for mitigating the emerging menace by EIV.
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Affiliation(s)
- Raj K. Singh
- ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Kumaragurubaran Karthik
- Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Chennai, India
| | - Rekha Khandia
- Department of Biochemistry and Genetics, Barkatullah University, Bhopal, India
| | - Ashok Munjal
- Department of Biochemistry and Genetics, Barkatullah University, Bhopal, India
| | | | - Sandip Chakraborty
- Department of Veterinary Microbiology, College of Veterinary Sciences and Animal Husbandry, West Tripura, India
| | - Yashpal S. Malik
- Division of Biological Standardization, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | | | - Rajendra Singh
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | | | - Muhammad Munir
- Division of Biomedical and Life Sciences, Lancaster University, Lancaster, United Kingdom
| | - Johannes H. van der Kolk
- Division of Clinical Veterinary Medicine, Swiss Institute for Equine Medicine (ISME), Vetsuisse Faculty, University of Bern and Agroscope, Bern, Switzerland
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Moghoofei M, Monavari SH, Mostafaei S, Hadifar S, Ghasemi A, Babaei F, Kavosi H, Tavakoli A, Javanmard D, Esghaei M, Khodabandehlou N. Prevalence of influenza A infection in the Middle-East: A systematic review and meta-analysis. CLINICAL RESPIRATORY JOURNAL 2018; 12:1787-1801. [DOI: 10.1111/crj.12758] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 12/06/2017] [Accepted: 12/14/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Mohsen Moghoofei
- Department of Microbiology, School of Medicine; Kermanshah University of Medical Sciences; Kermanshah Iran
| | | | - Shayan Mostafaei
- Department of Biostatistics, Faculty of Medical Sciences; Tarbiat Modares University; Tehran Iran
- Rheumatology Research Center; Tehran University of Medical Sciences; Tehran Iran
| | - Shima Hadifar
- Department of Mycobacteriology & Pulmonary Research; Pasteur Institute of Iran; Tehran Iran
- Microbiology Research Center (MRC); Pasteur Institute of Iran; Tehran Iran
| | - Amir Ghasemi
- Department of Materials Science and Engineering; Sharif University of Technology; Tehran Iran
| | - Farhad Babaei
- Department of Microbiology, School of Medicine; Kermanshah University of Medical Sciences; Kermanshah Iran
| | - Hoda Kavosi
- Rheumatology Research Center; Tehran University of Medical Sciences; Tehran Iran
| | - Ahmad Tavakoli
- Department of Virology, Faculty of Medicine; Iran University of Medical Sciences; Tehran Iran
| | - Davod Javanmard
- Department of Virology, Faculty of Medicine; Iran University of Medical Sciences; Tehran Iran
| | - Maryam Esghaei
- Department of Virology, Faculty of Medicine; Iran University of Medical Sciences; Tehran Iran
| | - Nilofar Khodabandehlou
- Department of Internal Medicine, Faculty of Medicine; Iran University of Medical Sciences; Tehran Iran
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Using epidemics to map H3 equine influenza virus determinants of antigenicity. Virology 2015; 481:187-98. [DOI: 10.1016/j.virol.2015.02.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 12/08/2014] [Accepted: 02/14/2015] [Indexed: 01/25/2023]
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