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BACKGROUND: In 2015-2016, a large Zika virus (ZIKV) outbreak occurred in the Americas. Although the exact ZIKV antibody kinetics after infection are unknown, recent evidence indicates the rapid waning of ZIKV antibodies in humans. Therefore, we aimed to determine the levels of ZIKV antibodies more than three years after a ZIKV infection. METHODS: We performed ZIKV virus neutralization tests (VNT) and a commercial ZIKV non-structural protein 1 (NS1) IgG ELISA in a cohort of 49 participants from Suriname who had a polymerase-chain-reaction-confirmed ZIKV infection more than three years ago. Furthermore, we determined the presence of antibodies against multiple dengue virus (DENV) antigens. RESULTS: The ZIKV seroprevalence in this cohort, assessed with ZIKV VNT and ZIKV NS1 IgG ELISA, was 59.2% and 63.3%, respectively. There was, however, no correlation between these two tests. Furthermore, we did not find evidence of a potential negative influence of DENV immunity on ZIKV antibody titers. CONCLUSIONS: ZIKV seroprevalence, assessed with two commonly used serological tests, was lower than expected in this cohort of participants who had a confirmed previous ZIKV infection. This can have implications for future ZIKV seroprevalence studies and possibly for the duration of immunological protection after a ZIKV infection.
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Anticorpos Neutralizantes/análise , Infecção por Zika virus/imunologia , Zika virus/imunologia , Adulto , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/análise , Anticorpos Antivirais/imunologia , Estudos de Coortes , Reações Cruzadas/imunologia , Dengue/virologia , Vírus da Dengue/imunologia , Ensaio de Imunoadsorção Enzimática/métodos , Feminino , Humanos , Imunoglobulina G/imunologia , Imunoglobulina M/imunologia , Masculino , Pessoa de Meia-Idade , Testes de Neutralização/métodos , Estudos Soroepidemiológicos , Testes Sorológicos/métodos , Suriname , Zika virus/patogenicidade , Infecção por Zika virus/metabolismo , Infecção por Zika virus/virologiaRESUMO
Guillain-Barré syndrome (GBS) is associated with various types of preceding infections including Campylobacter jejuni and cytomegalovirus, but there is also an association with arthropod borne viruses (arboviruses), such as Zika virus, that are endemic in tropical regions. Here we present the clinical characteristics of 12 GBS patients from Suriname that were hospitalized between the beginning of 2016 and half 2018. Extensive diagnostic testing was performed for pathogens that are commonly associated with GBS, but also for arboviruses, in order to identify the preceding infection that might have led to GBS. With this extensive testing algorithm, we could identify a recent infection in six patients of which four of them had evidence of a recent Zika virus or dengue virus infection. These results suggest that arboviruses, specifically Zika virus but possibly also dengue virus, might be important causative agents of GBS in Suriname. Furthermore, we found that more accessibility of intravenous immunoglobulins or plasma exchange could improve the treatment of GBS in Suriname.
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Viral infections have a large share in human morbidity and mortality. Next to vaccinations and hygiene measures, health education plays a role in preventing infections. Social scientists argue that empowerment should be included in health education, as increasing knowledge is insufficient to achieve sustainable behaviour change. Within the international education module 'Viruskenner', primary school students learn how to prevent virus infections by identifying health risks and developing interventions. This qualitative formative study explored to what extent Viruskenner creates conditions in which empowerment processes can arise and take place in the Netherlands and Suriname. Indicators of empowerment, as defined in the literature and placed in the attitude, social influence, and self-efficacy model, were assessed during semi-structured interviews (n = 24) with students, parents, teachers and facilitators. We conclude that Viruskenner is successful in creating conditions for empowerment processes to arise and take place, specifically in attitude and self-efficacy. According to interviewees, the module raised students' motivation, skills and confidence to take action to improve health behaviour. Educators played a stimulating role in the participatory setting in both countries, while content relevance and community involvement differed between the Netherlands and Suriname. These outcomes could improve this module and possibly other health education programmes.
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Instituições Acadêmicas , Viroses , Criança , Educação em Saúde , Humanos , Poder Psicológico , EstudantesRESUMO
In 2015-2016, a Zika virus (ZIKV) outbreak occurred in the Americas. In 2017, we conducted a ZIKV serosurvey in Suriname in which 770 participants were recruited from 1 urban area and 2 rural villages in the tropical rainforest. All collected samples were tested for presence of ZIKV antibodies using a ZIKV immunoglobulin G enzyme-linked immunosorbent assay and a virus neutralization assay. We found that 35.1% of the participants had neutralizing antibodies against ZIKV. In 1 remote village in the rainforest, 24.5% of the participants had neutralizing antibodies against ZIKV, suggesting that ZIKV was widely spread across Suriname.
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Infecção por Zika virus/epidemiologia , Infecção por Zika virus/imunologia , Zika virus/imunologia , Adolescente , Adulto , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/imunologia , Surtos de Doenças , Feminino , Humanos , Imunoglobulina G/imunologia , Masculino , Pessoa de Meia-Idade , Testes de Neutralização/métodos , Estudos Soroepidemiológicos , Suriname/epidemiologia , Adulto JovemRESUMO
Worldwide, virus infections are responsible for many diseases in terms of morbidity and mortality. Vaccinations and therapies are only available for relatively few virus infections and not always where they are needed. However, knowledge of transmission routes can prevent virus infection. In the context of this study, we measured the effects of a secondary school education module, named Viruskenner, on knowledge, attitude, and risk behavior as these relate to virus infections. A nonrandomized intervention study was conducted between April and August 2015 to assess the effect of this 2-month education module on knowledge, attitude, and behavior of 684 secondary school students in the Netherlands, Suriname, and Indonesia. For the Netherlands, a control group of a further 184 students was added. Factor analysis was performed on questions pertaining to attitude and behavior. Comparative analyses between pre- and posttest per country were done using multiple linear regression, independent sample T-tests, and one-way analysis of variance. These showed a significant increase in knowledge about virus infections and the prevention of infectious diseases among the Dutch and Surinamese groups, whereas a trend of increased knowledge was evident among the Indonesian participants. The Dutch control group showed an overall decrease in knowledge. Regression analyses showed that there was a significant interaction effect between participation and time on knowledge, attitude, and awareness and behavior and risk infection. Attitudes improved significantly in the intervention group. Pearson correlation coefficients between knowledge, attitude, and behavior were found to be positive.
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Síndrome da Imunodeficiência Adquirida/prevenção & controle , Educação em Saúde/métodos , Instituições Acadêmicas , Estudantes/psicologia , Materiais de Ensino , Viroses/prevenção & controle , Adolescente , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Indonésia , Masculino , Países Baixos , SurinameRESUMO
We present three patients from Suriname who were diagnosed with Guillain-Barré syndrome (GBS) during the Zika virus (ZIKV) outbreak in this country. One patient had a positive ZIKV urine real-time RT-PCR (qRT-PCR) result. The other two patients had a negative ZIKV urine qRT-PCR but a positive virus neutralization test and presence of IgG antibodies against ZIKV in the serum. Considering the evidence of a past ZIKV infection and absence of evidence for recent infections with the most common preceding infections of GBS, it is very likely that these GBS cases were triggered by ZIKV.
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INTRODUCTION: Suriname is a country on the northeastern Atlantic coast of South America. It is unique in the sense that different ethnic cultures live together within the country, resulting in high levels of transport of both humans and products between the Asian, African, and European continents as well as the Caribbean. Travel is only one of the many factors present in Suriname contributing to the risk for the emergence or introduction of any infectious disease. Recently, circulation of both chikungunya virus (CHIKV) and hantavirus was reported in areas neighboring Suriname. Here we report a retrospective and prospective study into chikungunya and hantavirus circulation. METHODS: A chikungunya and hantavirus retrospective serological study was conducted on samples submitted for dengue, leptospirosis, and/or influenza virus diagnostics between 2008 and 2012 to the Bureau of Public Health in Suriname. This was followed by a prospective CHIKV serological and molecular surveillance study until the detection of the first autochthonous CHIKV cases in Suriname in May and June of 2014. RESULTS: None of the tested samples showed the presence of CHIKV antibodies in the retrospective serological study. Prospective testing of CHIKV-suspected patients resulted in the detection of the first autochthonous CHIKV cases in Suriname in May, 2015. In one sample, we were able to isolate and sequence the virus. Retrospective testing for the presence of hantavirus antibodies showed a relative high response in both pan-hantavirus enzyme-linked immunosorbent assay (ELISA) and immunofluorescence assay (IFA). However, neutralization tests did not yield any evidence for infection with either Seoul or Andes hantavirus. CONCLUSION: Here we report the presence of CHIKV in the republic of Suriname and the first serological indication of hantavirus infections in symptomatic patients.
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Anticorpos Antivirais/imunologia , Febre de Chikungunya/epidemiologia , Vírus Chikungunya/imunologia , Doenças Transmissíveis Emergentes/epidemiologia , Infecções por Hantavirus/epidemiologia , Orthohantavírus/imunologia , Adolescente , Adulto , Idoso , Febre de Chikungunya/virologia , Vírus Chikungunya/isolamento & purificação , Criança , Ensaio de Imunoadsorção Enzimática , Feminino , Orthohantavírus/isolamento & purificação , Infecções por Hantavirus/virologia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Fatores de Risco , Suriname/epidemiologia , Viagem , Adulto JovemRESUMO
BACKGROUND: During a dengue outbreak on the Caribbean island Aruba, highly elevated levels of ferritin were detected in dengue virus infected patients. Ferritin is an acute-phase reactant and hyperferritinaemia is a hallmark of diseases caused by extensive immune activation, such as haemophagocytic lymphohistiocytosis. The aim of this study was to investigate whether hyperferritinaemia in dengue patients was associated with clinical markers of extensive immune activation and coagulation disturbances. METHODOLOGY/PRINCIPAL FINDINGS: Levels of ferritin, standard laboratory markers, sIL-2R, IL-18 and coagulation and fibrinolytic markers were determined in samples from patients with uncomplicated dengue in Aruba. Levels of ferritin were significantly increased in dengue patients compared to patients with other febrile illnesses. Moreover, levels of ferritin associated significantly with the occurrence of viraemia. Hyperferritinaemia was also significantly associated with thrombocytopenia, elevated liver enzymes and coagulation disturbances. The results were validated in a cohort of dengue virus infected patients in Brazil. In this cohort levels of ferritin and cytokine profiles were determined. Increased levels of ferritin in dengue virus infected patients in Brazil were associated with disease severity and a pro-inflammatory cytokine profile. CONCLUSIONS/SIGNIFICANCE: Altogether, we provide evidence that ferritin can be used as a clinical marker to discriminate between dengue and other febrile illnesses. The occurrence of hyperferritinaemia in dengue virus infected patients is indicative for highly active disease resulting in immune activation and coagulation disturbances. Therefore, we recommend that patients with hyperferritinaemia are monitored carefully.
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Transtornos da Coagulação Sanguínea/imunologia , Citocinas/sangue , Dengue/sangue , Dengue/imunologia , Ferritinas/sangue , Adulto , Biomarcadores/sangue , Transtornos da Coagulação Sanguínea/complicações , Brasil , Estudos de Coortes , Dengue/complicações , Vírus da Dengue/imunologia , Surtos de Doenças , Feminino , Humanos , Interleucina-18/sangue , Masculino , Pessoa de Meia-Idade , Países BaixosRESUMO
BACKGROUND: Endothelial cell dysfunction is believed to play an important role in the pathogenesis of plasma leakage in patients with acute dengue virus (DENV) infection. Several factors, produced by activated endothelial cells, have been associated with plasma leakage or severe disease in patients with infectious diseases. OBJECTIVES: The aim of this study was to investigate which of these markers could serve as a surrogate marker for the occurrence of plasma leakage in patients with acute DENV infection. STUDY DESIGN: A case-control study was performed in patients with acute DENV infection in Santos, Brazil. Plasma leakage was detected with X-ray and/or ultrasound examination at admission. Serum levels of soluble endoglin, endothelin-1, angiopoietin-2, VEGF, soluble VEGFR-2, MMP-2, MMP-9, TIMP-1 and TIMP-2 were determined using commercially available ELISAs. RESULTS: Increased levels of angiopoietin-2, endothelin-1 and MMP-2 and decreased levels of soluble VEGFR-2 were significantly associated with the occurrence of plasma leakage. An unsupervised cluster analysis confirmed that angiopoietin-2 and soluble VEGFR-2 were strongly associated with clinical apparent vascular leakage. CONCLUSION: Angiopoietin-2 and soluble VEGFR-2 can serve as surrogate markers for the occurrence of plasma leakage in patients with acute DENV infection.