Evaluation of Severe Acute Respiratory Syndrome surveillance caused by respiratory viruses in a pediatric unit, 2013 to 2019 / Avaliação da vigilância da Síndrome Respiratória Aguda Grave causada por vírus respiratórios em uma unidade pediátrica, 2013 a 2019

ABSTRACT Objective: To evaluate severe acute respiratory syndrome surveillance in a pediatric unit. Methods: Descriptive study of reported severe acute respiratory syndrome cases with the detection of respiratory viruses in the nasopharyngeal sample of patients hospitalized between 2013 and 2019, in a reference hospital in the Federal District, Brazil. Results: A total of 269 children had one or more viruses detected, resulting in 280 viruses, of which 152 (54%) were respiratory syncytial virus. The detection of respiratory syncytial virus was higher during the autumn-winter period. Children´s median age was 6.9 months, 156 (58%) were male, 104 (39%) had comorbidity, 197 (73%) required mechanical ventilation, 241 (90%) received antibiotics, and 146 (54%) oseltamivir. There were 19 (7%) deaths. The median time from symptom onset to sample collection was 5 days and the median time from sample collection to final results was 6 days. Conclusions: The system needs to reduce the time to deliver results so that inappropriate use of antibiotics and antivirals can be avoided. Moreover, the burden of viral pneumonia was relevant and the system must be flexible enough to include emerging viruses in order to be useful in responding to public health emergencies caused by respiratory viruses.

RESUMO Objetivo: Avaliar a vigilância da síndrome respiratória aguda grave em uma unidade pediátrica. Métodos: Estudo descritivo dos casos de síndrome respiratória aguda grave, notificados e com a detecção de vírus respiratório em amostra de nasofaringe de pacientes internados entre 2013 e 2019, em um hospital de referência do Distrito Federal. Resultados: Um total de 269 crianças tiveram algum vírus detectado, resultando em 280 vírus, sendo 152 (54%) vírus sincicial respiratório. A detecção do vírus sincicial respiratório foi maior durante o período de outono-inverno. A mediana da idade das crianças foi de 6,9 meses, 156 (58%) eram do sexo masculino, 104 (39%) tinham comorbidade, 197 (73%) necessitaram de ventilação mecânica, 241 (90%) receberam antibióticos e 146 (54%) oseltamivir. Ocorreram 19 (7%) óbitos. A mediana do tempo desde o início dos sintomas até a coleta da amostra foi de 5 dias, e do tempo da coleta até o resultado foi de 6 dias. Conclusões: O sistema necessita reduzir o tempo do resultado final para que seja possível evitar o uso inadequado de antibióticos e antivirais. Ademais, o impacto das pneumonias virais foi relevante e o sistema deve ser flexível suficiente para incluir vírus emergentes, para ser útil na resposta às emergências de saúde pública causada por vírus respiratórios.

Invasive candidiasis in a Brazilian neonatal intensive care unit / Candidíase invasiva em uma Unidade de Terapia Intensiva Neonatal brasileira

Abstract Objectives: to describe the epidemiology of invasive candidiasis in a neonatal intensive care unit. Methods: cross-sectional study that included all neonates with invasive candidiasis confirmed by blood culture from April 2015 to June 2018. Demographic, clinical and microbiological data were analyzed, comparing neonates with extreme low birth weight (ELBW) with neonates ≥ 1000g birth weight, considering a p <0.05 as statistically significant. Results: there were 38 cases of invasive candidiasis, resulting in an overall incidence of 2.5%. Twelve (32%) were ELBW neonates and 26 (68%) neonates ≥ 1000g birth weight, an incidence of 4.4% and 2.0%, respectively. Abdominal surgery was more frequent among neonates with birth weight ≥ 1000g compared to ELBW neonates (85% vs. 17%; p <0.01), as well as the median in days of antibiotics use (18 vs. 10.5; p = 0.04). The median in days of mechanical ventilation was more frequent among ELBW neonates (10 vs. 5.5; p = 0.04). The majority of Candida species were non-albicans (64%). Fatality rate was 32%. Conclusions: the incidence of invasive candidiasis among neonates with birth weight ≥ 1000g was higher than that found in the literature. This group has a higher proportion of gastrointestinal malformations that require surgery. Thus, fluconazole prophylaxis may be necessary for a broader group of neonates.

Resumo Objetivos: descrever a epidemiologia de candidíase invasiva em uma unidade de terapia intensiva neonatal. Métodos: estudo transversal que incluiu todos recém-nascidos com candidíase invasiva confirmada por hemocultura de abril de 2015 a junho de 2018. Foi analisado dados demográficos, clínicos e microbiológicos, comparando recém-nascidos de extremo baixo peso ao nascer (EBPN) com os recém-nascidos com peso ao nascer ≥1000g, considerando um valor de p<0,05 como estatisticamente significativo. Resultados: houve 38 casos de candidíase invasiva, resultando em uma incidência global de 2,5%. Doze (32%) eram neonatos de EBPN e 26 (68%) neonatos com peso ao nascer ≥1000g, resultando em uma incidência de 4,4% e 2,0%, respectivamente. A realização de cirurgia abdominal foi mais frequente nos neonatos com peso ao nascer ≥1000g em comparação com os neonatos de EBPN (85% vs. 17%; p<0,01), assim como a mediana dos dias de uso de antibióticos (18 vs. 10,5; p =0,04). Já o a mediana dos dias de ventilação mecânica foi mais frequente entre recém-nascido de EBPN (10 vs. 5,5; p = 0,04). A maioria das espécies de Candida eram não-albicans (64%). A letalidade foi de 32%. Conclusões: a incidência de candidíase invasiva entre os recém-nascidos ≥1000g ao nascer foi superior ao encontrado na literatura. Este grupo tem uma maior proporção de malformações gastrointestinais que requerem cirurgia. Assim, a profilaxia com fluconazol pode ser necessária para um grupo mais amplo de recém-nascidos.

Early-onset neonatal sepsis and the implementation of group B streptococcus prophylaxis in a Brazilian maternity hospital: a descriptive study

Abstract Objectives: To describe early-onset neonatal sepsis (EOS) epidemiology in a public maternity hospital in Brasilia, Brazil. Methods: We defined EOS as a positive blood culture result obtained from infants aged ≤72 hours of life plus treatment with antibiotic therapy for ≥5 days. Incidence was calculated based on the number of cases and total live births (LB). This is a descriptive study comparing the period of 2012-2013 with the period of 2014-September 2015, before and after implementation of antibiotic prophylaxis during labor for group B streptococcus (GBS) prevention, respectively. Results: Overall, 36 infants developed EOS among 21,219 LB (1.7 cases per 1000 LB) and 16 died (case fatality rate of 44%). From 2014, 305 vaginal-rectal swabs were collected from high-risk women and 74 (24%) turned out positive for GBS. After implementation of GBS prevention guidelines, no new cases of GBS were detected, and the EOS incidence was reduced from 1.9 (95% CI 1.3-2.8) to 1.3 (95% CI 0.7-2.3) cases per 1000 LB from 2012-2013 to 2014-September 2015 (p = 0.32). Conclusions: Although the reduction of EOS incidence was not significant, GBS colonization among pregnant women was high, no cases of neonatal GBS have occurred after implementation of prevention guidelines.

Sentinel surveillance of influenza and other respiratory viruses, Brazil, 2000-2010

There are scanty data on the epidemiology of influenza and other respiratory viruses in South America and Brazil. The aim of this study was to summarize the data from the Brazilian surveillance system of influenza and other respiratory viruses and discuss the patterns of viral circulation. The system is based on detecting cases of influenza-like illness in sentinel sites and weekly collection of five nasopharyngeal secretions samples, which are processed in state public health laboratories for respiratory viruses by indirect immunofluorescence assay. Data from 2000 to 2010 were described over time, by region, gender, and age group, and an analysis of Spearman correlation was performed between monthly influenza detection and rainfall and temperature data in two state capitals with the highest number of positive samples, one from the northeast region (Maceió) and other from the southern region (Curitiba). There were 3,291,946 visits for influenza-like illness; of these, 37,120 had samples collected and 6421 tested positive: 1690 (26%) influenza A, 567 (9%) influenza B, 277 (4%) parainfluenza 1, 571 (9%) parainfluenza 2, 589 (9%) parainfluenza 3, 742 (12%) adenovirus, and 1985 (31%) respiratory syncytial virus. Overall, increased activity of respiratory syncytial virus was observed from March to June, preceding the peak of influenza activity, from May to August, but with regional differences. In Maceió, there was a weak correlation between temperature and influenza detection (ρ = 0.05), but a moderate positive correlation between rainfall and influenza detection (ρ = 0.36). In Curitiba, a high correlation was observed between the decrease in temperature and rainfall and the increase in influenza detection (ρ = -0.83 and -0.78 respectively). These data are important to guide public health control measures as the best time for influenza vaccination and use of antivirals.

Prevalência de sintomáticos respiratórios em regiões do Distrito Federal, Brasil / Prevalence of respiratory symptoms in areas of the Federal District, Brazil

A captação de sintomáticos respiratórios (SR) é importante para a detecção precoce de tuberculose. O objetivo deste estudo foi estimar a prevalência de SR em três regiões administrativas (RA) do Distrito Federal, Brasil. Para tanto, foi utilizada a técnica de amostragem por conglomerados (30 por 7) proposta pela Organização Mundial da Saúde. Foram definidos como SR os indivíduos com 15 anos ou mais residentes nas RAs Estrutural, Itapoã ou Varjão e que apresentassem tosse há pelo menos 3 semanas na data da entrevista. A prevalência de SR em Estrutural e Varjão foi de 5,7 por cento (IC95 por cento: 2,4 a 9,0), e em Itapoã, de 4,8 por cento (IC95 por cento: 1,6 a 7,9), com efeito de desenho próximo de 1,0. Em Estrutural e Itapoã, menos anos de estudo, e em Itapoã e Varjão, menor renda, estiveram associados com ser SR. O tabagismo esteve associado com a presença de sintomas respiratórios em todas as RAs. A prevalência de SR está de acordo com aquela encontrada em outras áreas com perfil socioeconômico semelhante ao das áreas estudadas.

The identification of individuals with respiratory symptoms (RS) is important for the early detection of tuberculosis. The aim of this study was to estimate the prevalence of RS in three administrative regions of the Federal District, Brazil. For this, we used the 30 by 7 cluster sampling technique proposed by the World Health Organization. Individuals with RS were defined as those aged 15 years or older living in the administrative regions of Estrutural, Itapoã, or Varjão and reporting a cough lasting at least 3 weeks at the date of the interview. The prevalence of RS was 5.7 percent in Estrutural and Varjão (95 percent CI: 2.4-9.0) and 4.8 percent in Itapoã (95 percentCI: 1.6-7.9), with a design effect close to 1.0. In Estrutural and Itapoã, fewer years of schooling, and in Itapoã and Varjão, lower income, were associated with RS. Cigarette smoking was associated with the presence of RS in all regions. The prevalence of RS in the three administrative regions investigated is consistent with that of other areas with a similar socioeconomic profile.