Intense Seasonal A/H1N1 Influenza in Mexico, Winter 2013–2014

Dávila-Torres, Javier; Chowell, Gerardo; Borja-Aburto, Víctor Hugo; Viboud, Cécile; Grajalez-Muñiz, Concepción; Miller, Mark A.

doi:10.1016/j.arcmed.2014.11.005

Cited by 18 publications

(18 citation statements)

References 27 publications

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“…Our analysis showed that participants with detection of only influenza virus were less likely to require hospitalization than participants in whom other viruses were detected. This was observed despite the fact that the study included the 2013-2014 winter season, when a severe wave of influenza A(H1N1) pdm09 was registered in Mexico [25]. This result could be derived from inclusion of all influenza subtypes in the analysis.…”

Section: Discussionmentioning

confidence: 89%

Comparison of rates of hospitalization between single and dual virus detection in a Mexican cohort of children and adults with influenza-like illness

Noyola

Hunsberger

Salgado

et al. 2019

Open Forum Infectious Diseases

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Background. Molecular detection methods allow for the simultaneous detection of several infectious agents. This study assesses whether co-infection with 2 viruses as compared with 1 is associated with increased hospitalization in those with acute respiratory infections.Methods. We prospectively enrolled a cohort of pediatric and adult participants with influenza-like illness during 2010-2014 in Mexico. Clinical information and respiratory samples were collected at enrollment. Respiratory viruses were detected with multiplex polymerase chain reaction (PCR) and influenza-specific reverse transcription PCR assays. Participants were followed for 14 and 28 days after inclusion. Severity of disease, as measured by hospitalization with acute respiratory infections, was compared between single and dual viral infections.Results. Among 5662 participants in the study, either 1 (n = 3285) or 2 (n = 641) viruses were detected in 3926 participants. Rhinovirus (n = 1433), influenza (n = 888), and coronaviruses (n = 703) were the most frequently detected viruses (either alone or in co-infection). Bocavirus, respiratory syncytial virus (RSV), metapneumovirus, and rhinovirus cases were hospitalized more often than other viruses. Bocavirus+rhinovirus cases were hospitalized more often than those with rhinovirus alone (but not bocavirus alone). RSV cases were more likely to be hospitalized than cases with co-infections of RSV and parainfluenza virus or coronavirus. Metapneumovirus cases were hospitalized more often than those co-infected with metapneumovirus+coronavirus.Conclusions. In this study, detection of 2 viruses did not significantly increase hospitalizations compared with single virus infections. Larger studies will allow for distinguishing between sequential and simultaneous infection and for a better understanding of the role of each virus during the evolution of acute respiratory episodes.

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Section: Discussionmentioning

confidence: 89%

Comparison of rates of hospitalization between single and dual virus detection in a Mexican cohort of children and adults with influenza-like illness

Noyola

Hunsberger

Salgado

et al. 2019

Open Forum Infectious Diseases

View full text Add to dashboard Cite

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“…We also found that the clustering area of influenza was mainly distributed in the Children are much more infectious than adults and spread the virus until two weeks after infection (Keiko and Norio, 2006). Children and students, aged 0-14 years (especially 0-5 years), possessed the highest yearly incidence of influenza among patients, which was related to a slow build-up of immunity among young populations (Davila-Torres et al, 2015) and school life, mostly peaking in spring and winter (Wu et al, 2017). The results of occupation classification demonstrated that a high proportion from 2005 to 2015 occurred in farmers, who were less likely to know the main transmission route (either cough or talk face to face) (Lin et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Epidemiological features and trends of influenza incidence in mainland China: A population-based surveillance study from 2005 to 2015

Sun

Cong

et al. 2019

International Journal of Infectious Diseases

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To investigate epidemiological features and trends of influenza incidence with 1,173,640 cases in mainland China from 2005 to 2015. Methods: Incidence and mortality data for influenza from 2005 to 2015 were provided by the data-center of China public health science and covered a population of about 1.3 billion people from 31 provinces and regions in mainland China. Joinpoint regression and exploratory spatial data analyses were used to examine the incidence trends from 2005 to 2015. Results: The first upsurge in influenza cases occurred in 2009, and the highest incidence of influenza occurred in 2014 (15.9045 cases/100,000 people). The average incidence per year from 2009 to 2015 was threefold higher than that from 2005 to 2008 (10.5308 vs 3.4589 cases/100,000 people; incidence rate ratio = 3.0446). The joinpoint regression results showed that there was an increasing influenza incidence trend from 2005 to 2015 (annual change in percentage = 13.6%, 95%CI 2.2-26.3, p = 0.0236). The seasonal pattern analysis showed that influenza typically occurred in winter and spring during each monitoring year, peaking from November to March the next year. Conclusions: This study will help governments to make valuable decisions in allocating scarce resources and providing strategies to limit the spread of influenza.

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“…Public health agencies in the UK reported a particularly 'severe' season in 2010/11 [161,162], whereas Australia reported increased rates of severe influenza disease in 2014 [163][164][165], similar to Mexico during 2013/14. Classically, seasons have been regarded as 'severe' when coinciding with high overall case numbers, hospitalization rates, or mortality [166,167]. In the future, it will be important to distinguish the impact of fluctuations in influenza (sub)types on disease severity in specific patient groups, based on IPD.…”

Section: Discussionmentioning

confidence: 99%

Influenza and other respiratory viruses: standardizing disease severity in surveillance and clinical trials

Rath

Conrad

Myles

et al. 2017

Expert Review of Anti-infective Therapy

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Influenza-Like Illness is a leading cause of hospitalization in children. Disease burden due to influenza and other respiratory viral infections is reported on a population level, but clinical scores measuring individual changes in disease severity are urgently needed. Areas covered: We present a composite clinical score allowing individual patient data analyses of disease severity based on systematic literature review and WHO-criteria for uncomplicated and complicated disease. The 22-item ViVI Disease Severity Score showed a normal distribution in a pediatric cohort of 6073 children aged 0-18 years (mean age 3.13; S.D. 3.89; range: 0 to 18.79). Expert commentary: The ViVI Score was correlated with risk of antibiotic use as well as need for hospitalization and intensive care. The ViVI Score was used to track children with influenza, respiratory syncytial virus, human metapneumovirus, human rhinovirus, and adenovirus infections and is fully compliant with regulatory data standards. The ViVI Disease Severity Score mobile application allows physicians to measure disease severity at the point-of care thereby taking clinical trials to the next level.

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Intense Seasonal A/H1N1 Influenza in Mexico, Winter 2013–2014

Cited by 18 publications

References 27 publications

Comparison of rates of hospitalization between single and dual virus detection in a Mexican cohort of children and adults with influenza-like illness

Comparison of rates of hospitalization between single and dual virus detection in a Mexican cohort of children and adults with influenza-like illness

Epidemiological features and trends of influenza incidence in mainland China: A population-based surveillance study from 2005 to 2015

Influenza and other respiratory viruses: standardizing disease severity in surveillance and clinical trials

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