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Abdoullah B, Durand GA, Basco LK, El Bara A, Bollahi MA, Bosio L, Geulen M, Briolant S, Boukhary AOMS. Seroprevalence of Alphaviruses ( Togaviridae) among Urban Population in Nouakchott, Mauritania, West Africa. Viruses 2023; 15:1588. [PMID: 37515274 PMCID: PMC10385508 DOI: 10.3390/v15071588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
The presence of alphaviruses, such as chikungunya virus (CHIKV), has never been reported in Mauritania. We assessed the seroprevalence of CHIKV among Nouakchott residents. A cross-sectional study involving 1300 non-febrile patients consulting at the Nouakchott hospital center was conducted between January and June 2021. The presence of anti-CHIKV IgG and neutralizing antibodies against CHIKV, O'nyong-nyong virus (ONNV), and Semliki Forest virus (SFV) was determined by an enzyme-linked immunosorbent assay (ELISA) and a serum neutralization test, respectively, and the associated risk factors were investigated. Of the 1300 study participants, serological evidence of previous exposure to CHIKV was observed in 37 individuals (2.8%). Sex, age, reported use of repellants, and bed net ownership and usage were not associated with CHIKV seropositivity. Our results showed the co-circulation of two other alphaviruses, ONNV and SFV, in Nouakchott in 30 (2.3%) individuals. This is the first study that documents the co-circulation of CHIKV, ONNV, and SFV in Mauritania, albeit at low prevalence. Surveillance and routine testing for alphaviruses and other arboviruses in symptomatic patients should be implemented in health facilities to assess the health burden associated with these viruses. Efforts should also be made to strengthen the vector control measures.
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Affiliation(s)
- Bedia Abdoullah
- Unité de Recherche Génomes et Milieux (GEMI), Université de Nouakchott, Nouveau Campus Universitaire, Nouakchott BP 5026, Mauritania
| | - Guillaume André Durand
- National Reference Center for Arboviruses, National Institute of Health and Medical Research (Inserm) and French Armed Forces Biomedical Research Institute (IRBA), 13005 Marseille, France
- Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), 13005 Marseille, France
| | - Leonardo K Basco
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, 13005 Marseille, France
- IHU-Méditerranée Infection, 13005 Marseille, France
| | - Ahmed El Bara
- Institut National de Recherche en Santé Publique, Nouakchott BP 695, Mauritania
| | | | - Laurent Bosio
- National Reference Center for Arboviruses, National Institute of Health and Medical Research (Inserm) and French Armed Forces Biomedical Research Institute (IRBA), 13005 Marseille, France
- Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), 13005 Marseille, France
| | - Manon Geulen
- National Reference Center for Arboviruses, National Institute of Health and Medical Research (Inserm) and French Armed Forces Biomedical Research Institute (IRBA), 13005 Marseille, France
- Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), 13005 Marseille, France
| | - Sébastien Briolant
- Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, 13005 Marseille, France
- IHU-Méditerranée Infection, 13005 Marseille, France
- Unité de Parasitologie Entomologie, Département de Microbiologie et Maladies Infectieuses, Institut de Recherche Biomédicale des Armées (IRBA), 13005 Marseille, France
| | - Ali Ould Mohamed Salem Boukhary
- Unité de Recherche Génomes et Milieux (GEMI), Université de Nouakchott, Nouveau Campus Universitaire, Nouakchott BP 5026, Mauritania
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Durand GA, de Laval F, de Bonet d'Oléon A, Le Flem FX, Morin Y, Badaut C, Grard G, Brossier C, Fossier M, Dia A, Letois F, Geulen M, Piorkowski G, Meynard JB, Peduzzi F, Leparc-Goffart I, Pommier de Santi V. COVID-19 outbreak among French firefighters, Marseille, France, 2020. ACTA ACUST UNITED AC 2021; 26. [PMID: 34651571 PMCID: PMC8518307 DOI: 10.2807/1560-7917.es.2021.26.41.2001676] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We investigated a COVID-19 outbreak at a fire station in Marseille, France. Confirmed cases were defined as individuals with positive SARS-CoV-2 reverse transcription (RT)-PCR and/or neutralising antibodies. All 85 firefighters at work during the outbreak period were included after questioning and sampled for RT-PCR and viral neutralisation assay. Twenty-three firefighters were confirmed positive, 19 of them were symptomatic, and four asymptomatic cases were confirmed by virus neutralisation. A total of 22 firefighters had specific neutralising antibodies against SARS-CoV-2. Neutralising antibodies were found in four asymptomatic and 18 symptomatic cases. Eleven symptomatic cases had high titres (≥ 1:80). The earliest detection of neutralising antibodies was 7 days after symptom onset, and 80% had neutralising antibodies 15 days after onset. One viral culture was positive 13 days after onset. The attack rate was 27%. We identified two introductions of the virus in this outbreak, through a presymptomatic and a paucisymptomatic case. Asymptomatic cases were not the source of a third generation of cases, although they worked without wearing a mask, indicating that asymptomatic cases did not play a significant role in this outbreak. Management and strategy based on early research of clinical signs associated with self-quarantine was effective.
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Affiliation(s)
- Guillaume André Durand
- French Armed Forces Biomedical Research Institute, National Reference Laboratory for Arboviruses, Marseille, France.,Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | - Franck de Laval
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France.,Aix-Marseille University, INSERM, IRD, SESSTIM (Economic and Social Sciences, Health Systems, and Medical Informatics), Marseille, France
| | - Albane de Bonet d'Oléon
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - François Xavier Le Flem
- Marseille Battalion of Navy Firefighters, 9 boulevard de Strasbourg, 13233 Marseille Cedex 20, France
| | - Yann Morin
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Cyril Badaut
- Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France.,Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge Cedex, France
| | - Gilda Grard
- French Armed Forces Biomedical Research Institute, National Reference Laboratory for Arboviruses, Marseille, France.,Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | - Constance Brossier
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Marion Fossier
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Aissata Dia
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Flavie Letois
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Manon Geulen
- French Armed Forces Biomedical Research Institute, National Reference Laboratory for Arboviruses, Marseille, France.,Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | - Géraldine Piorkowski
- Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | - Jean-Baptiste Meynard
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France
| | - Frank Peduzzi
- Marseille Battalion of Navy Firefighters, 9 boulevard de Strasbourg, 13233 Marseille Cedex 20, France
| | - Isabelle Leparc-Goffart
- French Armed Forces Biomedical Research Institute, National Reference Laboratory for Arboviruses, Marseille, France.,Unité des Virus Émergents (UVE: Aix-Marseille Univ-IRD 190-Inserm 1207), Marseille, France
| | - Vincent Pommier de Santi
- French Military Health Service, French Armed Forces Centre for Epidemiology and Public Health (CESPA), Marseille, France.,University Hospital Institute Méditerranée Infection, Marseille, France.,Aix-Marseille University, IRD, AP-HM, SSA, VITROME, Marseille, France
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