Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016

Abstract Background Human metapneumovirus (HMPV) is a causal agent of acute respiratory infection, especially in primarily children. At the clinical level, HMPV is associated to several diseases including bronchitis, croup, pneumonia, bronchiolitis, reactive airway disease, chronic obstructive pulmo...

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Main Authors: Mamadou Malado Jallow, Amary Fall, Davy Kiori, Sara Sy, Déborah Goudiaby, Mamadou Aliou Barry, Malick Fall, Mbayame Ndiaye Niang, Ndongo Dia
Format: Article
Language:English
Published: BMC 2019-05-01
Series:BMC Infectious Diseases
Subjects:
Online Access:http://link.springer.com/article/10.1186/s12879-019-4096-y
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spelling doaj-c8896da399f34355b211c414f084dfc22020-11-25T03:50:56ZengBMCBMC Infectious Diseases1471-23342019-05-011911910.1186/s12879-019-4096-yEpidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016Mamadou Malado Jallow0Amary Fall1Davy Kiori2Sara Sy3Déborah Goudiaby4Mamadou Aliou Barry5Malick Fall6Mbayame Ndiaye Niang7Ndongo Dia8Département de Virologie, Institut Pasteur de DakarDépartement de Virologie, Institut Pasteur de DakarDépartement de Virologie, Institut Pasteur de DakarDépartement de Virologie, Institut Pasteur de DakarDépartement de Virologie, Institut Pasteur de DakarInstitut Pasteur de Dakar, Unité d’Epidémiologie des maladies infectieusesDépartement de Biologie, Animale Faculté des Sciences et Techniques Université Cheikh Anta DIOP de DakarDépartement de Virologie, Institut Pasteur de DakarDépartement de Virologie, Institut Pasteur de DakarAbstract Background Human metapneumovirus (HMPV) is a causal agent of acute respiratory infection, especially in primarily children. At the clinical level, HMPV is associated to several diseases including bronchitis, croup, pneumonia, bronchiolitis, reactive airway disease, chronic obstructive pulmonary disease and asthma exacerbations, specifically in children less than 5 years. Here, we carried out a retrospective pilot study, based on the processing of nasopharyngeal swabs, with a focus on the epidemiology and molecular characteristics of HMPV in Senegal. Methods This retrospective study was conducted from January 2012 to December 2016. Briefly, all outpatients presenting to healthcare sentinel sites were screened for surveillance enrollment and included if they met criteria for ILI. Naso-oropharyngeal swabs were collected from eligible participants. For viral respiratory pathogens detection, including HMPV, the Anyplex™ II RV16 Detection kit was used. A fragment of the hMPV F gene was targeted for sequencing. Results In total, 8209 patients with ILI were enrolled. Half of them (49.7%) were children under 5 years. Fever was the most common symptom followed by cough, and rhinitis. Three hundred eight patients were positive for HMPV (3.75%). 89 (28.9%) were detected as single infection. In co-infection cases, the most common co-infecting viruses were influenza, adenovirus and rhinovirus. HMPV detection rates in the different age groups varied significantly with the children under 5 years group accounting for 71.7% of positive patients. The temporal distribution pattern for HMPV infection showed a clear seasonal pattern with a higher activity during the rainy period (July–September). Phylogenetic analyses revealed that HMPV specimens circulating in Senegal were distributed into the two main genetic lineages, A and B. We also noted a co-circulation of both genetic lineages during the whole study period except in 2014. Conclusion In summary, the present study characterized the recent prevalence, seasonality and genetic diversity of HMPV in a large outpatient population presented with ILI in Senegal between 2012 and 2016. Globally our results show a clear seasonal circulation pattern of HMPV in Senegal. Our findings identified children less than 5 years as more susceptible group to HMPV infection. Molecular studies identified A2, B1 and B2 as the major genotypes circulating.http://link.springer.com/article/10.1186/s12879-019-4096-yHuman metapneumovirusInfluenza-like illnessEpidemiology
collection DOAJ
language English
format Article
sources DOAJ
author Mamadou Malado Jallow
Amary Fall
Davy Kiori
Sara Sy
Déborah Goudiaby
Mamadou Aliou Barry
Malick Fall
Mbayame Ndiaye Niang
Ndongo Dia
spellingShingle Mamadou Malado Jallow
Amary Fall
Davy Kiori
Sara Sy
Déborah Goudiaby
Mamadou Aliou Barry
Malick Fall
Mbayame Ndiaye Niang
Ndongo Dia
Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
BMC Infectious Diseases
Human metapneumovirus
Influenza-like illness
Epidemiology
author_facet Mamadou Malado Jallow
Amary Fall
Davy Kiori
Sara Sy
Déborah Goudiaby
Mamadou Aliou Barry
Malick Fall
Mbayame Ndiaye Niang
Ndongo Dia
author_sort Mamadou Malado Jallow
title Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
title_short Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
title_full Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
title_fullStr Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
title_full_unstemmed Epidemiological, clinical and genotypic features of human Metapneumovirus in patients with influenza-like illness in Senegal, 2012 to 2016
title_sort epidemiological, clinical and genotypic features of human metapneumovirus in patients with influenza-like illness in senegal, 2012 to 2016
publisher BMC
series BMC Infectious Diseases
issn 1471-2334
publishDate 2019-05-01
description Abstract Background Human metapneumovirus (HMPV) is a causal agent of acute respiratory infection, especially in primarily children. At the clinical level, HMPV is associated to several diseases including bronchitis, croup, pneumonia, bronchiolitis, reactive airway disease, chronic obstructive pulmonary disease and asthma exacerbations, specifically in children less than 5 years. Here, we carried out a retrospective pilot study, based on the processing of nasopharyngeal swabs, with a focus on the epidemiology and molecular characteristics of HMPV in Senegal. Methods This retrospective study was conducted from January 2012 to December 2016. Briefly, all outpatients presenting to healthcare sentinel sites were screened for surveillance enrollment and included if they met criteria for ILI. Naso-oropharyngeal swabs were collected from eligible participants. For viral respiratory pathogens detection, including HMPV, the Anyplex™ II RV16 Detection kit was used. A fragment of the hMPV F gene was targeted for sequencing. Results In total, 8209 patients with ILI were enrolled. Half of them (49.7%) were children under 5 years. Fever was the most common symptom followed by cough, and rhinitis. Three hundred eight patients were positive for HMPV (3.75%). 89 (28.9%) were detected as single infection. In co-infection cases, the most common co-infecting viruses were influenza, adenovirus and rhinovirus. HMPV detection rates in the different age groups varied significantly with the children under 5 years group accounting for 71.7% of positive patients. The temporal distribution pattern for HMPV infection showed a clear seasonal pattern with a higher activity during the rainy period (July–September). Phylogenetic analyses revealed that HMPV specimens circulating in Senegal were distributed into the two main genetic lineages, A and B. We also noted a co-circulation of both genetic lineages during the whole study period except in 2014. Conclusion In summary, the present study characterized the recent prevalence, seasonality and genetic diversity of HMPV in a large outpatient population presented with ILI in Senegal between 2012 and 2016. Globally our results show a clear seasonal circulation pattern of HMPV in Senegal. Our findings identified children less than 5 years as more susceptible group to HMPV infection. Molecular studies identified A2, B1 and B2 as the major genotypes circulating.
topic Human metapneumovirus
Influenza-like illness
Epidemiology
url http://link.springer.com/article/10.1186/s12879-019-4096-y
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