Pandemic influenza A (H1N1) 2009: epidemiological analysis of cases in a tropical/semi-arid region of Brazil

Neto, Roberto da Justa Pires; Lemos, Daniele Rocha Queiróz; Cavalcanti, Luciano Pamplona de Góes; Ramos, Alberto Novaes; Alencar, Carlos Henrique; Façanha, Mônica Cardoso; Barroso, Madalena Isabel Coelho; Vilar, Dina Cortez Lima Feitosa; Neto, Manoel Dias da Fonsêca

doi:10.1590/0037-8682-0016-2012

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…In reference to the presence of comorbidities, in the population of our study we found close proportions (32.53% of those confirmed, 38.29% of those discarded, 35.48% of the pregnant women confirmed, 39.01% of the pregnant women discarded, and 58.99% of deaths) with those of other studies. ( 9 , 14 , 16 , 18 , 22 , 24 , 29 )…”

Section: Discussionmentioning

confidence: 99%

Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010

Rossetto

Luna

2015

Einstein (São Paulo)

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Objective:To describe the clinical aspects of cases of influenza A(H1N1)pdm09 in Brazil.Methods:A descriptive study of cases reported in Sistema de Informação de Agravos de Notificação (SINAN), 2009-2010.Results:As the final classification, we obtained 53,797 (56.79%) reported cases confirmed as a new influenza virus subtype, and 40,926 (43.21%) cases discarded. Fever was the most common sign, recorded in 99.74% of the confirmed and 98.92% of the discarded cases. Among the confirmed cases, the presence of comorbidities was reported in 32.53%, and in 38.29% of the discarded cases. The case fatality rate was 4.04%; 3,267 pregnant women were confirmed positive for influenza A new viral subtype and 2,730 of them were cured. The case fatality rate of pregnant women was 6.88%.Conclusion:The findings suggested concern of the health system with pregnant women, and patients with comorbidities and quality of care may have favored a lower mortality. We recommend that, when caring for patients with severe respiratory symptoms, with comorbidities, or pregnant women, health professionals should consider the need for hospital care, as these factors make up a worse prognosis of infection by the pandemic influenza virus.

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Section: Discussionmentioning

confidence: 99%

Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010

Rossetto

Luna

2015

Einstein (São Paulo)

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“…Historically, most local outbreaks in Fortaleza were controlled through massive vaccination campaigns, e.g. , in the cases of H1N1 and measles 33 , 34 . In such cases, where both were vaccine-preventable diseases, the main interventions were the characterization of transmission chains to interrupt the spread (especially in the case of measles), and large-scale vaccination, which included an active search for unvaccinated individuals.…”

Section: Discussionmentioning

confidence: 99%

“…www.nature.com/scientificreports/ more research is still needed to improve public policies based on NPIs, mainly for situations that, for some reason, there are no vaccines available, which usually happen in the least developed and developing countries. Historically, most local outbreaks in Fortaleza were controlled through massive vaccination campaigns, e.g., in the cases of H1N1 and measles 33,34 . In such cases, where both were vaccine-preventable diseases, the main interventions were the characterization of transmission chains to interrupt the spread (especially in the case of measles), and large-scale vaccination, which included an active search for unvaccinated individuals.…”

Section: Figurementioning

confidence: 99%

Unveiling the paths of COVID-19 in a large city based on public transportation data

Araújo

Oliveira

Neto

et al. 2023

Sci Rep

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Human mobility plays a key role in the dissemination of infectious diseases around the world. However, the complexity introduced by commuting patterns in the daily life of cities makes such a role unclear, especially at the intracity scale. Here, we propose a multiplex network fed with 9 months of mobility data with more than 107 million public bus validations in order to understand the relation between urban mobility and the spreading of COVID-19 within a large city, namely, Fortaleza in the northeast of Brazil. Our results suggest that the shortest bus rides in Fortaleza, measured in the number of daily rides among all neighborhoods, decreased $$\approx 25$$ ≈ 25 % more than the longest ones after an epidemic wave. Such a result is the opposite of what has been observed at the intercity scale. We also find that mobility changes among the neighborhoods are synchronous and geographically homogeneous. Furthermore, we find that the most central neighborhoods in mobility are the first targets for infectious disease outbreaks, which is quantified here in terms of the positive linear relation between the disease arrival time and the average of the closeness centrality ranking. These central neighborhoods are also the top neighborhoods in the number of reported cases at the end of an epidemic wave as indicated by the exponential decay behavior of the disease arrival time in relation to the number of accumulated reported cases with decay constant $$\lambda \approx 33$$ λ ≈ 33 days. We believe that these results can help in the development of new strategies to impose restriction measures in the cities guiding decision-makers with smart actions in public health policies, as well as supporting future research on urban mobility and epidemiology.

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“…There is also an increased risk of adverse pregnancy outcomes, as seen during the pandemic H1N1 influenza virus, in 2009–2010 5,6,13–15. In Ceará, during the 2009–2010 influenza pandemic phase, pregnant women accounted for about 37·5% of the deaths due to confirmed A(H1N1)pdm09 virus infection 8. This might explain why there were a greater number of reported cases among pregnant women than among non-pregnant women of reproductive age, as there was no significant difference among the positivity of the two groups.…”

Section: Discussionmentioning

confidence: 99%

Post‐pandemic influenza A (H1N1) 2009 virus infection in pregnant women in Ceará, Brazil

Perdigão

Araújo²,

Melo³

et al. 2015

Influenza Resp Viruses

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ObjectiveThe aim of this study was to present results of the post-pandemic phase of A(H1N1)pdm09 virus infection in pregnant women in Ceará, Brazil, during the January–June 2012 influenza season.ResultsOne hundred and fifty-four nasopharyngeal swab samples were collected from pregnant women admitted to hospitals with suspected severe acute respiratory infection (SARI). Fifty-three (34·4%) had laboratory-confirmed A(H1N1)pdm09 virus infection with 15 (28·3%) outpatients and 38 (71·7%) hospitalized. Five (9·4%) women were in the first trimester of pregnancy, 20 (37·7%) in the second trimester of pregnancy, and 24 (45·2%) in the third trimester of pregnancy. Three had no information about the time of pregnancy. Six samples from newborns were also analyzed, of which three were nasopharyngeal swab positive for A(H1N1)pdm09. These swabs were collected immediately after birth, with the exception of one that was collected on the day after birth.ConclusionOur findings suggest that transplacental transfer of influenza viruses could occur as a result of severe illness in pregnancy. It is therefore important to encourage women to be vaccinated against influenza in order to avoid pregnancy complications.

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Pandemic influenza A (H1N1) 2009: epidemiological analysis of cases in a tropical/semi-arid region of Brazil

Abstract: The study suggests that the influenza A (H1N1) pandemic in this tropical/semi-arid region had a lower magnitude when compared to states in the Southern and Southeastern regions of Brazil.

Cited by 10 publications

References 17 publications

Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010

Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010

Unveiling the paths of COVID-19 in a large city based on public transportation data

Post‐pandemic influenza A (H1N1) 2009 virus infection in pregnant women in Ceará, Brazil

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