Sentinel surveillance of influenza in Burkina Faso: identification of circulating strains during 2010–2012

Tarnagda, Zékiba; Yougbaré, Issaka; Ilboudo, Abdoul Kader; Kagoné, Thérèse; Sanou, Armel M.; Cissé, Assana; Médah, Isaïe; Yelbéogo, Denis; Nzussouo, Ndahwouh Talla

doi:10.1111/irv.12259

Cited by 18 publications

(38 citation statements)

References 27 publications

(48 reference statements)

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“…The burden of seasonal influenza in children under 5 years of age and those from 5 to 14 years appears far greater than in the elderly [11][12][13][14][15][16]. This corroborates findings elsewhere that younger children experience a high influenza attack rate and a higher rate of influenza-related complications [46].…”

Section: Discussionsupporting

confidence: 82%

“…In Togo and Niger, the highest influenza positive percentage was observed in 5 -14 years old with respectively (30%) among ILI in Togo [12] and 25% among ILI patients and 10% among severe acute respiratory infection (SARI) patients in Niger [13]. In Burkina Faso, of the 881 patients with ILI enrolled and sampled in the sentinel surveillance system, 58 (6.6%) tested positive for influenza viruses [14]. In contrast to the findings in Togo and Niger, the most affected were patients within 0 -5 years (41.4%), the 6 -14 years old were the second (22.4%) [14].…”

Section: Morbidity and Co-morbiditymentioning

confidence: 99%

“…In Burkina Faso, of the 881 patients with ILI enrolled and sampled in the sentinel surveillance system, 58 (6.6%) tested positive for influenza viruses [14]. In contrast to the findings in Togo and Niger, the most affected were patients within 0 -5 years (41.4%), the 6 -14 years old were the second (22.4%) [14]. In Sierra Leone also the majority (36%) of ILI and SARI cases was detected in children under the age of four [15].…”

Section: Morbidity and Co-morbiditymentioning

confidence: 99%

See 2 more Smart Citations

Influenza-Associated Morbidity and Mortality in Sub-Saharan Africa

Diop

Montomoli

Sanicas

et al. 2016

IJVV

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Section: Discussionsupporting

confidence: 82%

Section: Morbidity and Co-morbiditymentioning

confidence: 99%

Section: Morbidity and Co-morbiditymentioning

confidence: 99%

See 1 more Smart Citation

Influenza-Associated Morbidity and Mortality in Sub-Saharan Africa

Diop

Montomoli

Sanicas

et al. 2016

IJVV

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“…Influenza virus survival and transmissibility might be influenced by multiple factors. Previous studies have found the seasonality of influenza viruses was associated with rainy season [6–12], or with low humidity levels [13–15]. Therefore, additional years of surveillance data with more information on climatic factors might be helpful to better understand the seasonality of influenza in Chongqing.…”

Section: Discussionmentioning

confidence: 99%

Epidemiological and Virological Characteristics of Influenza in Chongqing, China, 2011-2015

Li¹,

Xiong²,

BangZhong³

et al. 2016

PLoS ONE

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BackgroundChongqing is the largest municipality and located in Southwestern of China, with over 30 million registered inhabitants. There are few reports regarding the epidemiology of influenza in Chongqing. The objective of the paper is to explore the epidemiology of influenza in Chongqing, in order to provide scientific basis for prevention and control of influenza.Methodology /Principal FindingsFrom 2011 to 2015, we collected information on influenza-like illness (ILI) patients fulfilling the case definition, and took nasalpharyngeal or throat swabs specimens from ILI cases per week at the 7 sentinel hospitals. Specimens were tested by reverse transcription-polymerase chain reaction(RT-PCR) for influenza. Descriptive epidemiology was applied to analyze the epidemiology and etiology of influenza. A total of 9,696,212 cases were enrolled, of which 111,589 were ILI. Of those 24,868 samples from ILI cases, 13.3% (3,314/24,868) tested positive for influenza virus (65.7% influenza A, 34.1% influenza B, and 0.2% influenza A and B co-infection). Among the influenza A viruses, 71.3% were seasonal influenza A(H3N2) and 28.7% were influenza A(H1N1)pdm09. No cases of seasonal A(H1N1) were detected. The isolation rate was highest in children aged 5–14 years old. Influenza activity consistently peaked during January-March in 2011–2015, and June-July in 2012, 2014 and 2015.ConclusionsInfluenza is an important public health problem among ILI patients in Chongqing, especially among school-aged children. It might be beneficial to prioritize influenza vaccination for school-aged children and implement the school-based intervention to prevent and mitigating influenza outbreaks in Chongqing, particularly during the seasonal peaks.

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“…In Burkina Faso, an influenza sentinel surveillance for outpatients with influenza‐like illness (ILI) was established at the National Influenza Reference Laboratory in 2010, in the aftermath of the A(H1N1) pandemic. In a preliminary report covering 2010‐2012, 6.6% of ILI cases in the general population were influenza positive . The few studies investigating the seasonal circulation of influenza in Burkina Faso were not conclusive on seasonal patterns, hindering proper recommendations for a national policy for the management and prevention of influenza‐related illnesses, and no seasonal vaccination is currently performed in Burkina Faso.…”

Section: Introductionmentioning

confidence: 99%

Epidemiology and molecular characterization of influenza viruses in Burkina Faso, sub‐Saharan Africa

Sanou

Wandaogo

Poda

et al. 2018

Influenza Resp Viruses

Self Cite

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BackgroundThe importance of influenza viruses in respiratory infections in sub‐Saharan Africa has been historically overlooked, including in Burkina Faso.ObjectivesThis study therefore aimed at evaluating the prevalence and seasonal occurrence of influenza viruses in children under 5 years old, at risk of influenza‐related complications, presenting with influenza‐like illness (ILI) or severe acute respiratory infection (SARI). The study also aimed at identifying the periods with increased influenza transmission for vaccination recommendations in Burkina Faso.MethodsFrom January 2014 to December 2015, ILI and SARI (2015 only) patients were recruited in six healthcare centers in Burkina Faso. Influenza A and B molecular detection and subtyping were performed. Clade clustering of a subset of A(H1N1)pdm09 and A(H3N2) strains was deduced by performing phylogenetic analyses on hemagglutinin gene sequences. Weekly surveillance data from FluNet (2011‐2013; 2016) and this study (2014‐2015) were used to identify periods of increased influenza activity.ResultsInfluenza A and B viruses were detected in 15.1% (112 of 743) of ILI and 6.6% (12 of 181) of SARI patients. Overall, influenza A viruses were largely predominant (81 of 124, 65.3%), with 69.1% of A(H3N2) and 30.9% of A(H1N1)pdm09 strains. Four waves of increased transmission were identified in 2014‐2015, each dominated by different influenza subtypes and clades. Between 2011 and 2016, periods of increased influenza activity varied in their frequency, duration, and timing.ConclusionInfluenza A and B viruses were detected in a substantial number of ILI and SARI cases in Burkina Faso. Vaccination in September‐October would likely protect the highest number of patients.

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Sentinel surveillance of influenza in Burkina Faso: identification of circulating strains during 2010–2012

Cited by 18 publications

References 27 publications

Influenza-Associated Morbidity and Mortality in Sub-Saharan Africa

Influenza-Associated Morbidity and Mortality in Sub-Saharan Africa

Epidemiological and Virological Characteristics of Influenza in Chongqing, China, 2011-2015

Epidemiology and molecular characterization of influenza viruses in Burkina Faso, sub‐Saharan Africa

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