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1.
Mymensingh Med J ; 30(4): 1073-1078, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34605479

RESUMO

Dengue is endemic in more than a hundred countries throughout the tropics. The classic presentation of dengue fever has expanded its horizon by involving different organ systems, and these system-specific presentations pose a diagnostic dilemma. The objective of this prospective observational study was to evaluate the sociodemographic, and clinical profile of expanded dengue syndrome (EDS) patients admitted to a tertiary hospital in Dhaka, Bangladesh. Data were collected from all admitted patients from April 2019 to September 2019 and diagnosed with dengue. The patients with dengue having EDS were followed up till discharge. Of 4200 dengue cases admitted during this period, 108 patients (2.57%) were diagnosed with EDS. Among the EDS cases, 94% were from Dhaka city, and 6% were outside Dhaka city; 66% of the patients were male. Gastrointestinal (GI) manifestations were the most common (87%) type of EDS, and among the GI presentations, acute acalculous cholecystitis (38.3%), acute pancreatitis (30.85%), acute hepatitis (21.27%) were the most frequent. Among the EDS cases, 5.55% had a central nervous system (CNS), 4.6% cardiovascular (CVS), and 1.88% had renal complications; 0.93% presented with myositis. The majority (90.74%) of the patients recovered with conservative management, 10 (9.26%) died. This study shows that expanded dengue syndrome (EDS) is not uncommon in Bangladesh's dengue viral infection. A high degree of clinical suspicion is the key to early diagnosis and treatment.


Assuntos
Dengue , Pancreatite , Doença Aguda , Bangladesh/epidemiologia , Dengue/diagnóstico , Dengue/epidemiologia , Dengue/terapia , Humanos , Laboratórios , Masculino , Estudos Prospectivos , Centros de Atenção Terciária
2.
J Assoc Physicians India ; 69(8): 11-12, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34472817

RESUMO

COVID 19 since its onset in Wuhan in 2019 has overburdened our existing health resources and infrastructure. Dengue virus has been endemic in Asian countries since decades. Both being viruses with similar clinical profile and overlapping laboratory parameters has posed a great challenge for Asian countries to combat a co epidemic, creating a double burden. We, as clinicians must be more vigilant in diagnosing the patients so that dengue is not missed in this covid pandemic era and does not progress to life threatening dengue shock syndrome. More importantly, we should emphasize on preventive measures for prevention of dengue so that we can reduce the burden on health care system.


Assuntos
COVID-19 , Coinfecção , Dengue , Coinfecção/epidemiologia , Dengue/complicações , Dengue/diagnóstico , Dengue/epidemiologia , Humanos , Pandemias , SARS-CoV-2
6.
Artigo em Inglês | MEDLINE | ID: mdl-34586304

RESUMO

Dengue fever is re-emerging worldwide, however the reasons of this new emergence are not fully understood. Our goal was to report the incidence of dengue in one of the most populous States of Brazil, and to assess the high-risk areas using a spatial and spatio-temporal annual models including geoclimatic, demographic and socioeconomic characteristics. An ecological study with both, a spatial and a temporal component was carried out in Sao Paulo State, Southeastern Brazil, between January 1st, 2007 and December 31st, 2019. Crude and Bayesian empirical rates of dengue cases following by Standardized Incidence Ratios (SIR) were calculated considering the municipalities as the analytical units and using the Integrated Nested Laplace Approximation in a Bayesian context. A total of 2,027,142 cases of dengue were reported during the studied period. The spatial model allocated the municipalities in four groups according to the SIR values: (I) SIR<0.8; (II) SIR 0.8<1.2; (III) SIR 1.2<2.0 and SIR>2.0 identified the municipalities with higher risk for dengue outbreaks. "Hot spots" are shown in the thematic maps. Significant correlations between SIR and two climate variables, two demographic variables and one socioeconomical variable were found. No significant correlations were found in the spatio-temporal model. The incidence of dengue exhibited an inconstant and unpredictable variation every year. The highest rates of dengue are concentrated in geographical clusters with lower surface pressure, rainfall and altitude, but also in municipalities with higher degree of urbanization and better socioeconomic conditions. Nevertheless, annual consolidated variations in climatic features do not influence in the epidemic yearly pattern of dengue in southeastern Brazil.


Assuntos
Dengue , Teorema de Bayes , Brasil/epidemiologia , Dengue/epidemiologia , Surtos de Doenças , Humanos , Incidência , Fatores Socioeconômicos
7.
BMC Infect Dis ; 21(1): 893, 2021 Aug 31.
Artigo em Inglês | MEDLINE | ID: mdl-34465288

RESUMO

BACKGROUND: Several studies have reported a significant association of knowledge, attitude and preventive practice (KAP) regarding dengue infection among community's resident in endemic areas. In this study we aimed to assess and develop a reliable and valid KAP survey on the subject of dengue that is suitable for the resident population of Sabah, Malaysia. METHODS: A community-based cross-sectional study was conducted from October 2019 to February 2020 involving 468 respondents. Information on the socio-demographic characteristics of the participants (six items), their KAP (44, 15 and 18 items on knowledge, attitude and practice, respectively) and treatment-seeking behaviour (five items) towards dengue was collected using a structured questionnaire. Data analysis was performed using SPSS and R software in the R Studio environment. The knowledge section was analysed by two-parameter logistic item response theory (2-PL IRT) using ltm package. The construct validity and reliability of items for sections on attitude, practice and treatment-seeking behaviour were analysed using psy package. RESULTS: For the knowledge section, only 70.5% (31/44) of items were within or close to the parameter acceptable range of -3 to + 3 of difficulty. In terms of discrimination, 65.9% (29/44) of items were within or close to the acceptable range of 0.35 to 2.5, and 24 items (54.5%) failed to fit the 2-PL IRT model (P < 0.05) after assessing by goodness-of-fit analysis. Only eight items were reliable and retained in the attitude section with a Kaiser-Meyer-Olkin (KMO) test value of > 0.7, while based on the communalities, 11 items in the attitude section were excluded due to very low h2, factor loading values and low correlation with the total (< 0.5). The practice section was found suitable for factor analysis because the KMO value was > 0.7. The communalities of the practice section showed that seven items had low h2 values (< 0.3), which were therefore excluded from further analysis, and only 11 items were retained. CONCLUSIONS: The KAP items retained in the final version of the survey were reliable and valid to be use as a questionnaire reference when conducting future similar studies among the population of Sabah.


Assuntos
Dengue , Conhecimentos, Atitudes e Prática em Saúde , Estudos Transversais , Dengue/epidemiologia , Dengue/prevenção & controle , Análise Fatorial , Humanos , Malásia/epidemiologia , Reprodutibilidade dos Testes , Inquéritos e Questionários
8.
BMC Infect Dis ; 21(1): 911, 2021 Sep 06.
Artigo em Inglês | MEDLINE | ID: mdl-34488666

RESUMO

BACKGROUND: The potential shift of major causes of febrile illnesses from malaria to non-malarial febrile illnesses, including arboviral diseases such as chikungunya and dengue, is of concern. The last outbreaks of these infections were reported in 2018 and 2019 for chikungunya in Zanzibar and dengue in Dar es Salaam. We conducted a cross-sectional study that involved serological testing of stored blood samples from the blood banks in Temeke Referral Hospital in Dar es Salaam and the National Blood Bank Unit in Zanzibar. The samples were collected from Zanzibar and Dar es Salaam donors in May and June 2020, respectively. A total of 281 samples were included in the study, and their demographic information extracted from the registers. The samples were then transported to Muhimbili University of Health and Allied Sciences at the Microbiology Laboratory. They were subjected to an indirect ELISA to detect IgG and IgM against dengue and chikungunya viruses. RESULTS: Seropositive IgM samples from Dar es Salaam were 3/101 (2.97%) for chikungunya and 1/101 (0.9%) for dengue, while samples from Zanzibar were all IgM negative for both viruses. Chikungunya IgG seropositivity was significantly higher (p ≤ 0.05) in Dar es Salaam 21/101 (21.2%) than Zanzibar 22/180 (12.2%). There was no difference in dengue IgG seropositivity between Dar es Salaam 44/101 (43.5%) and Zanzibar 68/180 (37.8%). Similarly, dual IgG seropositivity for both dengue and chikungunya viruses were not different between Dar es Salaam 13/101 (12.9%) and Zanzibar 11/180 (6.1%). CONCLUSION: Detection of IgM for dengue and chikungunya in Dar es Salaam indicates recent or ongoing transmission of the two viruses in the absence of a reported outbreak. These findings suggest the possibility of transmission of the two infections through blood transfusion. Detection of IgG antibodies for dengue and chikungunya viruses might be contributed by both; the ongoing infections and residual responses caused by preceding infections in the country. Results from blood banks may represent the tip of the iceberg. Further studies are needed to gain insight into the actual burden of the two diseases in Tanzania.


Assuntos
Febre de Chikungunya , Dengue , Doadores de Sangue , Febre de Chikungunya/epidemiologia , Estudos Transversais , Dengue/epidemiologia , Humanos , Estudos Soroepidemiológicos , Tanzânia/epidemiologia
9.
BMC Infect Dis ; 21(1): 940, 2021 Sep 10.
Artigo em Inglês | MEDLINE | ID: mdl-34507547

RESUMO

BACKGROUND: Dengue virus infection (DVI) is a major health problem in many parts of the world. Its manifestations range from asymptomatic infections to severe disease. Although cardiac involvement has been reported in DVI, its incidence has not yet been well established. METHODS: From July 2016 to January 2018, patients hospitalized at the Hospital for Tropical Diseases, Faculty of Tropical Medicine, Mahidol University, Thailand, with dengue virus infection confirmed by positive NS1 or positive dengue immunoglobulin M findings, participated in the study. We characterized the incidence and change in cardiac function by serial echocardiography and levels of troponin-T and creatine kinase-myocardial band (CK-MB) on the day of admission, the day of defervescence, the first day of hypotension (if any), and at 2 week follow-up. RESULTS: Of the 81 patients evaluated, 6 (7.41%) exhibited elevated biomarker levels. There was no difference in clinical presentation amongst dengue fever, dengue haemorrhagic fever (DHF) and dengue shock syndrome (DSS), except for the amount of bleeding. Cardiac involvement was found in 22.2% of patients: 3 (3.70%) had left ventricular systolic dysfunction, 3 (3.70%) had transient diastolic dysfunction, 6 (7.41%) had increased levels of at least one cardiac biomarker (troponin-T or CK-MB), and 6 (7.41%) had small pericardial effusion. Myocarditis was suspected in only two patients (with DHF); thus, myocarditis was uncommon in patients with dengue virus infection. Three patients developed DSS during admission and were transferred to the intensive care unit. CONCLUSION: Cardiac involvement in adults with dengue infection was common, ranging from elevated cardiac biomarker to myocarditis. Abnormalities in cardiac function had resolved spontaneously by the day of follow-up, without specific treatment. We found that DHF was a significant risk factor for cardiac involvement. Echocardiography is the investigation of choice for evaluating the haemodynamic status of patients with DVI, especially in severe dengue.


Assuntos
Cardiomiopatias , Dengue , Miocardite , Adulto , Dengue/diagnóstico por imagem , Dengue/epidemiologia , Ecocardiografia , Coração , Humanos
10.
Parasit Vectors ; 14(1): 483, 2021 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-34538265

RESUMO

BACKGROUND: During the period of the coronavirus disease 2019 (COVID-19) outbreak, strong intervention measures, such as lockdown, travel restriction, and suspension of work and production, may have curbed the spread of other infectious diseases, including natural focal diseases. In this study, we aimed to study the impact of COVID-19 prevention and control measures on the reported incidence of natural focal diseases (brucellosis, malaria, hemorrhagic fever with renal syndrome [HFRS], dengue, severe fever with thrombocytopenia syndrome [SFTS], rabies, tsutsugamushi and Japanese encephalitis [JE]). METHODS: The data on daily COVID-19 confirmed cases and natural focal disease cases were collected from Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu Provincial CDC). We described and compared the difference between the incidence in 2020 and the incidence in 2015-2019 in four aspects: trend in reported incidence, age, sex, and urban and rural distribution. An autoregressive integrated moving average (ARIMA) (p, d, q) × (P, D, Q)s model was adopted for natural focal diseases, malaria and severe fever with thrombocytopenia syndrome (SFTS), and an ARIMA (p, d, q) model was adopted for dengue. Nonparametric tests were used to compare the reported and the predicted incidence in 2020, the incidence in 2020 and the previous 4 years, and the difference between the duration from illness onset date to diagnosed date (DID) in 2020 and in the previous 4 years. The determination coefficient (R2) was used to evaluate the goodness of fit of the model simulation. RESULTS: Natural focal diseases in Jiangsu Province showed a long-term seasonal trend. The reported incidence of natural focal diseases, malaria and dengue in 2020 was lower than the predicted incidence, and the difference was statistically significant (P < 0.05). The reported incidence of brucellosis in July, August, October and November 2020, and SFTS in May to November 2020 was higher than that in the same period in the previous 4 years (P < 0.05). The reported incidence of malaria in April to December 2020, HFRS in March, May and December 2020, and dengue in July to November 2020 was lower than that in the same period in the previous 4 years (P < 0.05). In males, the reported incidence of malaria in 2020 was lower than that in the previous 4 years, and the reported incidence of dengue in 2020 was lower than that in 2017-2019. The reported incidence of malaria in the 20-60-year age group was lower than that in the previous 4 years; the reported incidence of dengue in the 40-60-year age group was lower than that in 2016-2018. The reported cases of malaria in both urban and rural areas were lower than in the previous 4 years. The DID of brucellosis and SFTS in 2020 was shorter than that in 2015-2018; the DID of tsutsugamushi in 2020 was shorter than that in the previous 4 years. CONCLUSIONS: Interventions for COVID-19 may help control the epidemics of natural focal diseases in Jiangsu Province. The reported incidence of natural focal diseases, especially malaria and dengue, decreased during the outbreak of COVID-19 in 2020. COVID-19 prevention and control measures had the greatest impact on the reported incidence of natural focal diseases in males and people in the 20-60-year age group.


Assuntos
Brucelose/epidemiologia , COVID-19/prevenção & controle , Dengue/epidemiologia , Malária/epidemiologia , Adulto , Distribuição por Idade , Idoso , COVID-19/epidemiologia , China/epidemiologia , Surtos de Doenças , Feminino , Humanos , Incidência , Masculino , Pessoa de Meia-Idade , Distanciamento Físico , Febre Grave com Síndrome de Trombocitopenia/epidemiologia , Viagem/estatística & dados numéricos , Adulto Jovem
11.
BMC Infect Dis ; 21(1): 981, 2021 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-34544378

RESUMO

BACKGROUND: The World Health Organization (WHO) has ranked dengue as one of the top ten threats to Global health in 2019. Sri Lanka faced a massive dengue epidemic in 2017, the largest outbreak in the country during the last three decades, consisting of 186,101 reported cases, and over 320 deaths. The epidemic was controlled by intense measures taken by the health sector. However, the reported dengue cases and dengue deaths in 2019 were significantly higher than that of 2018. Deaths were mostly due to delay in hospitalization of severe dengue patients. The mortality of dengue hemorrhagic fever is 2-5% if detected early and treated promptly, but is high as 20% if left untreated. METHODS: A descriptive cross-sectional study was done among patients with dengue fever presenting to the Sri Jayawardenepura General Hospital during October 2019. Data was collected using a questionnaire comprising 20 questions based on knowledge, attitudes and practices on dengue, which were categorized into questions on awareness of mortality and severity of dengue burden, prevention of dengue vector mosquito breeding and acquiring the infection, patient's role in dengue management, and warning signs requiring prompt hospitalization. RESULTS: The mean KAP score on all questions was 55%, while a majority of 65.2% patients scored moderate KAP scores (50-75%) on all questions, and only 7.6% had high KAP scores (> 75%). The highest categorical mean score of 62% was on awareness of dengue prevention, followed by 54% on awareness of dengue burden, and only 51% on dengue management. Only 5.3% patients scored high scores on awareness of dengue management, followed by 28.5%, and 40.9% patients scoring high scores on awareness of dengue burden, and awareness of prevention of dengue respectively. The mean KAP scores on all questions increased with increasing age category. CONCLUSION: The population relatively has a better awareness of dengue prevention, as compared to awareness of dengue mortality and dengue management. The identified weak point is patient awareness of the patients' role in dengue management, and identifying warning signs requiring prompt hospitalization. This results in delay in treatment, which is a major cause for increased mortality. There was a correlation between those who had good knowledge on dengue burden and those who were aware of patients' role in dengue management. An action plan should be implemented to improve public awareness through education programs on the role of the public and patients in dengue management to drive a better outcome.


Assuntos
Dengue , Conhecimentos, Atitudes e Prática em Saúde , Animais , Estudos Transversais , Dengue/epidemiologia , Dengue/prevenção & controle , Humanos , Mosquitos Vetores , Sri Lanka/epidemiologia , Centros de Atenção Terciária
12.
Rev Assoc Med Bras (1992) ; 67(5): 731-735, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34550264

RESUMO

OBJECTIVE: The aim was to determine the epidemiological profile of dengue fever in Brazil between the years 2014 and 2019. METHODS: This is an observational, descriptive, cross-sectional, and retrospective study, which was carried out through the analysis of secondary data collected from the National System of Notification Appeals (SINAN) and from SUS Computer Department (DATASUS). RESULTS: The total number of reported cases was 5,867,255, and 2015 was the year with the highest cases (1,696,340). The cases were predominant in the Southeast and Midwest macro-regions, the female sex (55.6%), brown people (48%), and clinical and epidemiological criteria of confirmation (63.8%). Regarding the age group, it was observed that during the study period, the highest prevalence occurred in individuals between 20 and 39 years (38.3%). There was a change of serotype from DENV-1 to DENV-2, and dengue was the most prevalent classification (95.2%). Concerning hospitalization rates, there was a limited necessity of admissions (5.7%), as well as few deaths due to the notified disease (3,444). CONCLUSIONS: There was a significant growth in the number of dengue fever cases in Brazil in 2019, which represents a public health problem.


Assuntos
Dengue , Adulto , Brasil/epidemiologia , Estudos Transversais , Dengue/epidemiologia , Feminino , Humanos , Estudos Retrospectivos , Sorogrupo , Adulto Jovem
13.
Rev Soc Bras Med Trop ; 54: e0223, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34586289

RESUMO

INTRODUCTION: Dengue, chikungunya, and Zika are a growing global health problem. This study analyzed the spatial distribution of dengue, chikungunya, and Zika cases in São Luís, Maranhão, from 2015 to 2016 and investigated the association between socio-environmental and economic factors and hotspots for mosquito proliferation. METHODS: This was a socio-ecological study using data from the National Information System of Notifiable Diseases. The spatial units of analysis were census tracts. The incidence rates of the combined cases of the three diseases were calculated and smoothed using empirical local Bayes estimates. The spatial autocorrelation of the smoothed incidence rate was measured using Local Moran's I and Global Moran's I. Multiple linear regression and spatial autoregressive models were fitted using the log of the smoothed disease incidence rate as the dependent variable and socio-environmental factors, demographics, and mosquito hotspots as independent variables. RESULTS: The findings showed a significant spatial autocorrelation of the smoothed incidence rate. The model that best fit the data was the spatial lag model, revealing a positive association between disease incidence and the proportion of households with surrounding garbage accumulation. CONCLUSIONS: The distribution of dengue, chikungunya, and Zika cases showed a significant spatial pattern, in which the high-risk areas for the three diseases were explained by the variable "garbage accumulated in the surrounding environment," demonstrating the need for an intersectoral approach for vector control and prevention that goes beyond health actions.


Assuntos
Febre de Chikungunya , Dengue , Infecção por Zika virus , Zika virus , Animais , Teorema de Bayes , Brasil/epidemiologia , Febre de Chikungunya/epidemiologia , Dengue/epidemiologia , Incidência , Mosquitos Vetores , Análise Espacial , Infecção por Zika virus/epidemiologia
14.
Front Cell Infect Microbiol ; 11: 681937, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34447698

RESUMO

Dengue virus (DENV) infection is prevalent in tropical and subtropical regions of the world, which is fatal if untreated symptomatically. Emergence of new genotype within serotypes led to enhanced severity. The objective of the study is to identify the molecular characteristics of the DENV circulated during 2017 outbreak in Tamil Nadu, India, and to investigate the role of inflammatory cytokines in different "serotypes" and in "dengue severity". A total of 135 suspected samples were tested for DENV infection using IgM, IgG, and qPCR assay; where 76 samples were positive for DENV and analyzed for 12 inflammatory cytokines using ELISA. Serotyping shows 14 DENV-1, 22 DENV-2, 7 DENV-3, and 33 DENV-4, where DENV-4 was predominant. Among 76, 42 isolates were successfully sequenced for C-prM region and grouped. A lineage shift was observed in DENV-4 genotype. Irrespective of serotypes, IFNγ was significantly elevated in all serotypes than control as well as in primary infection than secondary, indicating its role in immune response. GM-CSF and IP-10 were significantly elevated in secondary infection and could be used as prognostic biomarkers for secondary infection. Our observation shows differential cytokine expression profile varied with each serotype, indicating serotype/genotype-specific viral proteins might play a major role in dengue severity. DENV-4 as dominant serotype was reported in Tamil Nadu for the first time during an outbreak with a mixed Th1/Th17 cytokine expression profile that correlated with disease severity. We conclude it is essential to identify circulating viral genotype and their fitness by mutational analysis to correlate with disease severity and immune status, as this correlation will be helpful in diagnostics and therapeutics applications.


Assuntos
Vírus da Dengue , Dengue , Citocinas , Dengue/epidemiologia , Vírus da Dengue/genética , Surtos de Doenças , Genótipo , Humanos , Índia/epidemiologia , Filogenia , Sorogrupo
15.
PLoS Negl Trop Dis ; 15(8): e0009603, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34370734

RESUMO

BACKGROUND: The COVID-19 pandemic has induced unprecedented reductions in human mobility and social contacts throughout the world. Because dengue virus (DENV) transmission is strongly driven by human mobility, behavioral changes associated with the pandemic have been hypothesized to impact dengue incidence. By discouraging human contact, COVID-19 control measures have also disrupted dengue vector control interventions, the most effective of which require entry into homes. We sought to investigate how and why dengue incidence could differ under a lockdown scenario with a proportion of the population sheltered at home. METHODOLOGY & PRINCIPAL FINDINGS: We used an agent-based model with a realistic treatment of human mobility and vector control. We found that a lockdown in which 70% of the population sheltered at home and which occurred in a season when a new serotype invaded could lead to a small average increase in cumulative DENV infections of up to 10%, depending on the time of year lockdown occurred. Lockdown had a more pronounced effect on the spatial distribution of DENV infections, with higher incidence under lockdown in regions with higher mosquito abundance. Transmission was also more focused in homes following lockdown. The proportion of people infected in their own home rose from 54% under normal conditions to 66% under lockdown, and the household secondary attack rate rose from 0.109 to 0.128, a 17% increase. When we considered that lockdown measures could disrupt regular, city-wide vector control campaigns, the increase in incidence was more pronounced than with lockdown alone, especially if lockdown occurred at the optimal time for vector control. CONCLUSIONS & SIGNIFICANCE: Our results indicate that an unintended outcome of lockdown measures may be to adversely alter the epidemiology of dengue. This observation has important implications for an improved understanding of dengue epidemiology and effective application of dengue vector control. When coordinating public health responses during a syndemic, it is important to monitor multiple infections and understand that an intervention against one disease may exacerbate another.


Assuntos
COVID-19/prevenção & controle , Dengue/epidemiologia , SARS-CoV-2 , Animais , Dengue/prevenção & controle , Dengue/transmissão , Humanos , Incidência , Controle de Mosquitos , Saúde Pública
16.
BMC Infect Dis ; 21(1): 867, 2021 Aug 24.
Artigo em Inglês | MEDLINE | ID: mdl-34429064

RESUMO

BACKGROUND: Dengue fever is a mosquito born disease associated with self-limited to life threatening illness. First detected in Senegal in the nineteenth century, and despite its growing incidence this last decade, significant knowledge gaps exist in our knowledge of genetic diversity of circulating strains. This study highlights the circulating serotypes and genotypes between January 2017 and December 2018 and their spatial and temporal distribution throughout all regions of Senegal. METHODS: We used 56 dengue virus (DENV) strains for the analysis collected from 11 sampling areas: 39 from all regions of Senegal, and 17 isolates from Thiès, a particular area of the country. Two real time RT-qPCR systems were used to confirm dengue infection and corresponding serotypes. For molecular characterization, CprM gene was sequenced and submitted to phylogenetic analysis for serotypes and genotypes assignment. RESULTS: Three dengue virus serotypes (DENV-1-3) were detected by all used methods. DENV-3 was detected in 50% (28/56) of the isolates, followed by DENV-1 and DENV-2, each representing 25% (14/56) of the isolates. DENV-3 belongs to genotype III, DENV-1 to genotype V and DENV-2 to Cosmopolitan genotype. Serotype 3 was detected in 7 sampling locations and a co-circulation of different serotypes was observed in Thiès, Fatick and Richard-toll. CONCLUSIONS: These results emphasize the need of continuous DENV surveillance in Senegal to detect DENV cases, to define circulating serotypes/genotypes and to prevent the spread and the occurrence of severe cases.


Assuntos
Vírus da Dengue/genética , Dengue/epidemiologia , Dengue/diagnóstico , Vírus da Dengue/isolamento & purificação , Humanos , Filogenia , Vigilância em Saúde Pública , Senegal/epidemiologia , Sorogrupo , Análise Espacial
17.
Zhonghua Yu Fang Yi Xue Za Zhi ; 55(8): 978-982, 2021 Aug 06.
Artigo em Chinês | MEDLINE | ID: mdl-34445836

RESUMO

Objective: This study retrospectively analyzed an outbreak of dengue fever in Puyang of Henan province in 2019, in order to find the sources of infection. Methods: Dengue virus IgM/IgG and NS1 antigen were tested by colloidal gold method. E gene was amplified by PCR. MegaX was used for sequences alignment to construct evolutionary distance trees. Results: After clinical and laboratory confirmation, there were 81 cases of dengue fever, 17 of which were imported case who were local farmers and worked in Combadia and Thailand, and 64 of which were indigenous cases. The E gene alignment results showed that the pathogen of this epidemic was Vietnamese 1 and highly homologous with the Vietnamese strain. After the local outbreak, dengue virus E gene developed a nucleotide site mutation which can be steadily transmission. Conclusion: The dengue fever outbreak in Puyang was a local outbreak caused by dengue virus type 1, which was associated with imported cases. Gene sequencing showed that the imported pathogen had a relatively stable and transmissible nucleotide mutation after the local epidemic.


Assuntos
Vírus da Dengue , Dengue , Dengue/epidemiologia , Vírus da Dengue/genética , Surtos de Doenças , Humanos , Filogenia , Estudos Retrospectivos
18.
Einstein (Sao Paulo) ; 19: eAO5969, 2021.
Artigo em Inglês, Português | MEDLINE | ID: mdl-34346987

RESUMO

OBJECTIVE: To assess Google Trends accuracy for epidemiological surveillance of dengue and yellow fever, and to compare the incidence of these diseases with the popularity of its terms in the state of São Paulo. METHODS: Retrospective cohort. Google Trends survey results were compared to the actual incidence of diseases, obtained from Centro de Vigilância Epidemiológica "Prof. Alexandre Vranjac", in São Paulo, Brazil, in periods between 2017 and 2019. The correlation was calculated by Pearson's coefficient and cross-correlation function. The accuracy was analyzed by sensitivity and specificity values. RESULTS: There was a statistically significant correlation between the variables studied for both diseases, Pearson coefficient of 0.91 for dengue and 0.86 for yellow fever. Correlation with up to 4 weeks of anticipation for time series was identified. Sensitivity was 87% and 90%, and specificity 69% and 78% for dengue and yellow fever, respectively. CONCLUSION: The incidence of dengue and yellow fever in the State of São Paulo showed a strong correlation with the popularity of its terms measured by Google Trends in weekly periods. Google Trends tool provided early warning, with high sensitivity, for the detection of outbreaks of these diseases.


Assuntos
Dengue , Febre Amarela , Brasil/epidemiologia , Dengue/epidemiologia , Surtos de Doenças , Humanos , Estudos Retrospectivos , Ferramenta de Busca , Febre Amarela/epidemiologia
20.
BMC Infect Dis ; 21(1): 729, 2021 Aug 02.
Artigo em Inglês | MEDLINE | ID: mdl-34340682

RESUMO

BACKGROUND: Dengue is the most common arboviral disease in the tropical and sub-tropical regions of the world. Like other regions, dengue-endemic areas have faced the additional public health and socio-economic impact of the ongoing coronavirus disease 2019 (COVID-19) pandemic. COVID-19 and dengue co-infections have been reported, with complicated patient management and care requirements. This review aimed to collate and synthesise current knowledge on the clinical features and outcomes of COVID-19 and dengue virus co-infection, a potentially important new dimension to be considered in public health management of the COVID-19 pandemic. METHODS: A systematic literature review was conducted using PubMed, Web of Science and Scopus databases from 1st January to 21st November 2020. The key search terms used were "dengue" and "coronavirus". Descriptive analysis with graphical illustrations were used to present the clinical and laboratory parameters of the co-infection. RESULTS: Thirteen published papers and four news articles were included in the review. Most studies were case reports with a detailed description of the clinical and laboratory characteristics of the co-infection. All cases were in adults with the exception of a six-year old child. The common symptoms of co-infection were fever, dyspnea, headache, and cough. Common laboratory results included thrombocytopenia, lymphocytopenia, elevated transaminases, and leukopenia. Serious outcomes of co-infection included septic shock, acute respiratory disease syndrome and multi-organ failure, leading to death in some patients. CONCLUSIONS: COVID-19 and dengue co-infection was associated with severe disease and fatal outcomes. The correct diagnosis and treatment of co-infection poses a substantial challenge due to the overlapping clinical and laboratory parameters. Therefore, confirmative diagnostic tests are necessary for accurate and timely diagnosis and patient management.


Assuntos
COVID-19 , Coinfecção , Dengue , Adulto , Criança , Coinfecção/epidemiologia , Dengue/complicações , Dengue/diagnóstico , Dengue/epidemiologia , Humanos , Pandemias , SARS-CoV-2
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