Efeito da sazonalidade climática na ocorrência de sintomas respiratórios em uma cidade de clima tropical

OBJETIVO: Avaliar o efeito da sazonalidade climática na ocorrência de sintomas respiratórios em uma cidade de clima tropical no Brasil. MÉTODOS: Estudo de corte transversal relacionando dados de indivíduos que procuraram assistência médica em uma Unidade Básica de Saúde na cidade de Goiânia (GO) com dados meteorológicos coletados diariamente. No intervalo de um ano, todos os pacientes que preenchiam os critérios de inclusão foram entrevistados em 44 dias distintos (11 em cada estação) escolhidos aleatoriamente. ANOVA foi usada para a comparação das médias das variáveis dependentes por estação. Correlação foi conduzida entre as variáveis dependentes e cada variável meteorológica. Os efeitos das variáveis meteorológicas foram analisados com um modelo de AutoRegressive Moving Average with eXogenous input (ARMAX, média móvel autorregressiva com entrada exógena). RESULTADOS: Dos 3.354 participantes, 494 (14,6%) apresentavam sintomas respiratórios. A variação de temperatura não foi suficiente para provocar mudanças no número de indivíduos com sintomas respiratórios; porém, houve aumento desse número com baixos níveis de umidade no inverno, com diferença estatisticamente significativa entre as estações (p < 0,01). Foi observado que a média da umidade relativa mínima dos três dias que antecederam as observações correlacionou-se negativamente com o número de indivíduos com sintomas respiratórios (p = 0,04), e um modelo ARMAX incluindo a mesma variável apresentou um coeficiente estatisticamente significativo (p < 0,0001). CONCLUSÕES: Nesta amostra, o número de indivíduos com sintomas respiratórios aumentou significativamente com a redução da umidade relativa do ar, e esse aumento pôde ser previsto a partir de dados meteorológicos

Late-Relapsing Hepatitis after Yellow Fever

One patient presented hyporexia, asthenia, adynamia, and jaundice two months after acute yellow fever (YF) onset; plus laboratory tests indicating hepatic cytolysis and a rebound of alanine and aspartate transaminases, and total and direct bilirubin levels. Laboratory tests discarded autoimmune hepatitis, inflammatory or metabolic liver disease, and new infections caused by hepatotropic agents. Anti-YFV IgM, IgG and neutralizing antibodies were detected in different times, but no viremia. A liver biopsy was collected three months after YF onset and tested positive for YFV antigens and wild-type YFV-RNA (364 RNA-copies/gram/liver). Transaminases and bilirubin levels remained elevated for five months, and the arresting of symptoms persisted for six months after the acute YF onset. Several serum chemokines, cytokines, and growth factors were measured. A similar immune response profile was observed in the earlier phases of the disease, followed by more pronounced changes in the later stages, when transaminases levels returned to normal. The results indicated viral persistence in the liver and continual liver cell damage three months after YF onset and reinforced the need for extended follow-ups of YF patients. Further studies to investigate the role of possible viral persistence and the immune response causing relapsing hepatitis following YF are also necessary

Geoeconomic variations in epidemiology, ventilation management, and outcomes in invasively ventilated intensive care unit patients without acute respiratory distress syndrome: a pooled analysis of four observational studies

Background: Geoeconomic variations in epidemiology, the practice of ventilation, and outcome in invasively ventilated intensive care unit (ICU) patients without acute respiratory distress syndrome (ARDS) remain unexplored. In this analysis we aim to address these gaps using individual patient data of four large observational studies. Methods: In this pooled analysis we harmonised individual patient data from the ERICC, LUNG SAFE, PRoVENT, and PRoVENT-iMiC prospective observational studies, which were conducted from June, 2011, to December, 2018, in 534 ICUs in 54 countries. We used the 2016 World Bank classification to define two geoeconomic regions: middle-income countries (MICs) and high-income countries (HICs). ARDS was defined according to the Berlin criteria. Descriptive statistics were used to compare patients in MICs versus HICs. The primary outcome was the use of low tidal volume ventilation (LTVV) for the first 3 days of mechanical ventilation. Secondary outcomes were key ventilation parameters (tidal volume size, positive end-expiratory pressure, fraction of inspired oxygen, peak pressure, plateau pressure, driving pressure, and respiratory rate), patient characteristics, the risk for and actual development of acute respiratory distress syndrome after the first day of ventilation, duration of ventilation, ICU length of stay, and ICU mortality. Findings: Of the 7608 patients included in the original studies, this analysis included 3852 patients without ARDS, of whom 2345 were from MICs and 1507 were from HICs. Patients in MICs were younger, shorter and with a slightly lower body-mass index, more often had diabetes and active cancer, but less often chronic obstructive pulmonary disease and heart failure than patients from HICs. Sequential organ failure assessment scores were similar in MICs and HICs. Use of LTVV in MICs and HICs was comparable (42·4% vs 44·2%; absolute difference -1·69 [-9·58 to 6·11] p=0·67; data available in 3174 [82%] of 3852 patients). The median applied positive end expiratory pressure was lower in MICs than in HICs (5 [IQR 5-8] vs 6 [5-8] cm H2O; p=0·0011). ICU mortality was higher in MICs than in HICs (30·5% vs 19·9%; p=0·0004; adjusted effect 16·41% [95% CI 9·52-23·52]; p&lt;0·0001) and was inversely associated with gross domestic product (adjusted odds ratio for a US$10 000 increase per capita 0·80 [95% CI 0·75-0·86]; p&lt;0·0001). Interpretation: Despite similar disease severity and ventilation management, ICU mortality in patients without ARDS is higher in MICs than in HICs, with a strong association with country-level economic status