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BACKGROUND: Nonspecific acute tropical febrile illnesses (NEATFI) are common in the Latin American tropics. Dengue, Chikungunya, Zika, Mayaro, and Usutu, among others, can coexist in the American tropics. This study aimed to surveil the arboviruses that cause| acute febrile syndrome in patients in the Meta department, Colombia. METHODS: Between June 2021 and February 2023, an epidemiological surveillance study was conducted in the Llanos of the Meta department in Eastern Colombia. RESULTS: One hundred patients in the acute phase with typical prodromal symptoms of NEATFI infection who attended the emergency department of the Villavicencio Departmental Hospital were included. ELISA tests were performed for Dengue, Usutu, Chikungunya, and Mayaro. RT-qPCR was performed to detect the arboviruses Usutu, Dengue, Zika, Mayaro, and Oropouche. The seroprevalence for the Chikungunya, Mayaro, and Usutu viruses was 41 % (28/68), 40 % (27/67), and 62 % (47/75), respectively. Seroconversion for Chikungunya was observed in one patient; two seroconverted to Mayaro and one to Usutu. The NS5 gene fragment of the Usutu virus was detected in nine febrile patients. RT-qPCR of the remaining arboviruses was negative. The clinical symptoms of the nine Usutu-positive patients were very similar to those of Dengue, Chikungunya, Zika, and Mayaro infections. CONCLUSIONS: The pervasive detection of unexpected viruses such as Usutu and Mayaro demonstrated the importance of searching for other viruses different from Dengue. Because Usutu infection and Mayaro fever have clinical features like Dengue, a new algorithm should be proposed to improve the accuracy of acute tropical fevers.
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Infecções por Arbovirus , Arbovírus , Monitoramento Epidemiológico , Humanos , Colômbia/epidemiologia , Masculino , Feminino , Arbovírus/isolamento & purificação , Arbovírus/genética , Infecções por Arbovirus/epidemiologia , Infecções por Arbovirus/virologia , Infecções por Arbovirus/diagnóstico , Adulto , Adolescente , Adulto Jovem , Pessoa de Meia-Idade , Estudos Soroepidemiológicos , Febre/epidemiologia , Febre/virologia , Criança , Anticorpos Antivirais/sangue , Pré-Escolar , Febre de Chikungunya/epidemiologia , Febre de Chikungunya/diagnóstico , Idoso , Ensaio de Imunoadsorção EnzimáticaRESUMO
Abstract Objective: This study aimed to evaluate the diagnostic utility, disease activity, and phenotypic association of serum anti-Saccharomyces cerevisiae antibody (ASCA), perinuclear anti-neutrophil cytoplasmic antibody (pANCA), PR3-ANCA, and MPO-ANCA in pediatric patients with inflammatory bowel disease (IBD). Methods: Pediatric patients diagnosed with IBD were recruited and classified as Crohn's disease (CD), ulcerative colitis (UC), and IBD-unclassified (IBD-U) through full investigation. The Paris classification was used to evaluate disease phenotypes of pediatric CD and UC. Results: In all, 229 pediatric patients with IBD (CD 147, UC 53, IBD-U 29) were included. The ASCA IgG seropositivity significantly differed among the three groups (CD 75.4%, UC 17.5%, and IBD-U 60.0%; p < 0.001). PR3-ANCA positive rates were the highest in UC (24.0%), followed by IBD-U (17.6%), and none in CD (p = 0.002); pANCA-positive rates were higher in IBD-U (33.6%), followed by UC (28.0%) than in CD (1.4%) (p < 0.001). Regarding disease phenotype, perianal disease revealed higher serum ASCA IgG titers (median 36.7 U/mL in P1 vs. 25.2 U/mL in P0, p = 0.019). Serum ASCA IgG and IgA cutoff values to distinguish CD were 32.7 (U/mL) and 11.9 (U/mL), respectively, with a specificity of 80.0%. Conclusion: Serological biomarkers of ASCA IgG and IgA were effective for differentiating CD in pediatric IBD patients, and serum pANCA and PR3-ANCA, but not MPO-ANCA, were effective in distinguishing UC and IBD-U. Furthermore, measuring serological titers of ASCA IgG and IgA may help differentiate CD and evaluate the disease activity and phenotype of pediatric IBD in practice.
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OBJECTIVE: This study aimed to evaluate the diagnostic utility, disease activity, and phenotypic association of serum anti-Saccharomyces cerevisiae antibody (ASCA), perinuclear anti-neutrophil cytoplasmic antibody (pANCA), PR3-ANCA, and MPO-ANCA in pediatric patients with inflammatory bowel disease (IBD). METHODS: Pediatric patients diagnosed with IBD were recruited and classified as Crohn's disease (CD), ulcerative colitis (UC), and IBD-unclassified (IBD-U) through full investigation. The Paris classification was used to evaluate disease phenotypes of pediatric CD and UC. RESULTS: In all, 229 pediatric patients with IBD (CD 147, UC 53, IBD-U 29) were included. The ASCA IgG seropositivity significantly differed among the three groups (CD 75.4%, UC 17.5%, and IBD-U 60.0%; p < 0.001). PR3-ANCA positive rates were the highest in UC (24.0%), followed by IBD-U (17.6%), and none in CD (p = 0.002); pANCA-positive rates were higher in IBD-U (33.6%), followed by UC (28.0%) than in CD (1.4%) (p < 0.001). Regarding disease phenotype, perianal disease revealed higher serum ASCA IgG titers (median 36.7 U/mL in P1 vs. 25.2 U/mL in P0, p = 0.019). Serum ASCA IgG and IgA cutoff values to distinguish CD were 32.7 (U/mL) and 11.9 (U/mL), respectively, with a specificity of 80.0%. CONCLUSION: Serological biomarkers of ASCA IgG and IgA were effective for differentiating CD in pediatric IBD patients, and serum pANCA and PR3-ANCA, but not MPO-ANCA, were effective in distinguishing UC and IBD-U. Furthermore, measuring serological titers of ASCA IgG and IgA may help differentiate CD and evaluate the disease activity and phenotype of pediatric IBD in practice.
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Colite Ulcerativa , Doenças Inflamatórias Intestinais , Humanos , Criança , Anticorpos Anticitoplasma de Neutrófilos , Colite Ulcerativa/diagnóstico , Biomarcadores , Fenótipo , Imunoglobulina G , Imunoglobulina ARESUMO
ABSTRACT Objective: To investigate the prior testing for HIV, syphilis, hepatitis B (HBV), and hepatitis C (HCV) among transgender women and travestis (TGW) in five Brazilian cities and identify factors associated with each of these previous tests. Methods: This is a cross-sectional study with the recruitment of TGW through respondent-driven sampling (TransOdara Study). The investigated outcome variable was prior testing for HIV, syphilis, HBV, and HCV in the last 12 months. The association between sociodemographic and behavioral factors with the outcome was analyzed using a binomial logistic regression with mixed effects. Adjusted odds ratios (aOR) and 95% confidence intervals (CI95%) were estimated. Results: The proportions of individuals with prior testing in the past year were as follows: 56.3% for HIV, 58.0% for syphilis, 42.1% for HBV, and 44.7% for HCV. Negative associations with prior testing were observed for individuals aged 35 years or older, whereas positive associations were found for those with high school education, those who experienced verbal or psychological violence in the last 12 months, and those who had commercial or casual partners in the last 6 months. Conclusion: There was low frequency of testing in the 12 months preceding the study for HIV, syphilis, HBV, and HCV compared to the guidelines established by the Ministry of Health. Expanding access to and engagement with healthcare and prevention services for TGW is an essential strategy in reducing the transmission chain of HIV and other sexually transmitted infections (STIs).
RESUMO Objetivo: Investigar a realização de testagem prévia de HIV, sífilis, hepatites B (HBV) e C (HCV) entre mulheres trans e travestis (MTT) em cinco cidades brasileiras e identificar fatores associados à testagem. Métodos: Trata-se de um estudo de corte transversal, com recrutamento de MTT através do respondent-driven sampling (Projeto TransOdara). A variável de desfecho investigada foi realização de testagem prévia HIV, Sífilis, HBV e HCV nos últimos 12 meses. A associação entre fatores sociodemográficos e comportamentais com o desfecho foi analisada usando modelo de regressão logística binomial com efeitos mistos. Estimou-se odds ratio ajustada (aOR) e intervalos de confiança a 95% (IC95%). Resultados: As proporções de pessoas com realização prévia de testagem foram: 56,3% para HIV, 58,0% para sífilis, 42,1% para HBV e 44,7% para HCV. Observaram-se associação negativa da testagem prévia com idade de 35 anos ou mais e associação positiva com ter ensino médio, ter sofrido violência verbal ou psicológica nos últimos 12 meses e ter tido parceiro comercial ou casual nos últimos seis meses. Conclusão: Verificou-se baixa frequência de testagem nos últimos 12 meses anteriores ao estudo para HIV, Sífilis, HBV e HCV em comparação às orientações estipuladas pelo Ministério da Saúde. A ampliação do acesso e vinculação aos serviços de atenção e prevenção para as MTT é uma estratégia essencial para a redução da cadeia de transmissão do HIV e outras infecções sexualmente transmissíveis.
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Objective: To evaluate the effects of changing the algorithm for serological diagnosis of T. cruzi infection in departmental-level public health laboratories and in the National Reference Laboratory of Colombia, from the perspective of access to diagnosis. Methods: A descriptive, cross-sectional study was carried out, based on secondary sources between 2015 and 2021, consolidating the number of serological tests carried out by the laboratories. A survey was developed to identify benefits and limitations in the implementation of the new algorithm for serological diagnosis. Totals, proportions, and averages of the number of tests were estimated by comparing two different periods. Results: Information from 33 public health laboratories was analyzed, 87.9% of which processed serological assays during the period under study. The use of serological tests increased after the publication of the new guideline in 2017, and the capacity to perform the second test increased from four to 33 public health laboratories. In absolute terms, ELISAs for antigens and recombinant antigens became the most performed tests in Colombia after 2017. Conclusions: The change in the algorithm for serological diagnosis of Chagas disease in Colombia in 2017 had positive effects on access to diagnosis since it facilitated the use of the second test. This change resulted in increased diagnostic coverage. The country's laboratories have access to a simple, timely, quality algorithm that could be implemented in almost any clinical laboratory in the country.
Objetivo: Avaliar os efeitos da mudança do algoritmo de diagnóstico sorológico da infecção por T. cruzi nos Laboratórios Departamentais de Saúde Pública e no Laboratório Nacional de Referência da Colômbia desde a perspectiva do acesso ao diagnóstico. Métodos: Foi realizado um estudo descritivo transversal a partir de fontes secundárias do período entre 2015 e 2021, consolidando-se o número de testes sorológicos realizados pelos laboratórios. Foi desenvolvido um questionário para identificar benefícios e limitações na implementação do novo algoritmo de diagnóstico sorológico. Os totais, as proporções e as médias do número de testes foram estimados pela comparação de dois períodos diferentes. Resultados: Dados de 33 laboratórios de saúde pública foram analisados, e constatou-se que 87,9% processaram testes sorológicos durante o período analisado. O uso de testes sorológicos aumentou após a publicação das novas diretrizes em 2017, e a capacidade de realizar um segundo teste aumentou de 4 para 33 laboratórios de saúde pública. O ELISA com antígeno total e o ELISA com antígeno recombinante se consolidaram como os testes mais realizados na Colômbia após 2017. Conclusões: A mudança no algoritmo de diagnóstico sorológico da doença de Chagas na Colômbia em 2017 teve efeitos positivos no acesso ao diagnóstico, facilitando o uso do segundo teste, o que resultou em maior cobertura diagnóstica. Os laboratórios do país têm à sua disposição um algoritmo simples, oportuno e de alta qualidade que poderia ser implementado em quase todos os laboratórios clínicos do país.
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[This corrects the article on p. 100 in vol. 12, PMID: 36196438.].
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BACKGROUND: Chagas disease represents a major public health concern in several Latin American countries, including Bolivia. METHODS: We present a longitudinal serosurvey for Trypanosoma cruzi antibodies among a cohort of 120 school-age children from rural communities in the Bolivian Chaco at three time points between 2017 and 2019. Serum samples extracted from dry blood spots collected on filter paper were tested for T. cruzi antibodies by enzyme-linked immunosorbent assay and rapid diagnostic test. RESULTS: T. cruzi antibodies were detected in 7/120 (5.8%), 8/120 (6.7%) and 11/120 (9.2%) samples in 2017, 2018 and 2019, respectively. An average incidence of 1.76 per 100 person-years was observed. CONCLUSIONS: Our findings support the persistence of vector-borne T. cruzi transmission in this area, highlighting the need for strengthening multidisciplinary efforts against Chagas disease.
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Doença de Chagas , Trypanosoma cruzi , Humanos , Criança , Bolívia/epidemiologia , Doença de Chagas/epidemiologia , Ensaio de Imunoadsorção Enzimática , Anticorpos AntiprotozoáriosRESUMO
Introduction. Monoclonal B-cell lymphocytosis generally precedes chronic lymphocytic leukemia, affecting about 12% of the healthy adult population. This frequency increases in relatives of patients with chronic B-cell lymphoproliferative disorders. Objective. To determine the frequency of monoclonal B-cell lymphocytosis in relatives of patients with chronic B-cell lymphoproliferative disorders, their immunophenotypic/cytogenetic characteristics, a possible relationship with infectious agents, and short-term follow-up in the Colombian population. Materials and methods. Fifty healthy adults with a family history of chronic B-cell lymphoproliferative disorders were studied using multiparametric flow cytometry, cytogenetic/serological testing, lifestyle survey, and 2-year follow-up. Results. The frequency of monoclonal B-cell lymphocytosis found was 8%, with a predominance of female gender and advanced age, increasing to 12.5% for individuals with a family history of chronic lymphocytic leukemia. Three out of four individuals presented chronic lymphocytic leukemia-type immunophenotype, all with low counts. In turn, a significantly higher number of cells/µl is observed in these individuals in T lymphocyte subpopulations, together with a greater predisposition to the disease. The described clonal populations increase over time in a non-significant manner. Conclusions. The frequency and behavior of monoclonal B-cell lymphocytosis in patients with family history of chronic B-cell lymphoproliferative disorders are like those found in related studies, which suggests that there is no involvement of more relevant genes that can trigger uncontrolled clonal proliferation, but that generates immunological deregulation that could justify a greater risk of serious infection in these individuals.
Introducción. La linfocitosis monoclonal de células B, generalmente, precede la leucemia linfocítica crónica y afecta alrededor del 12 % de la población adulta sana. Esta frecuencia se incrementa en familiares de pacientes con síndromes linfoproliferativos crónicos de células B.Objetivo. Determinar la frecuencia de linfocitosis monoclonal B en familiares de pacientes con síndromes linfoproliferativos crónicos B, sus características inmunofenotípicas y citogenéticas, posible relación con agentes infecciosos, y seguimiento a corto plazo de población colombiana.Materiales y métodos. Se estudiaron 50 adultos sanos con antecedentes familiares de síndromes linfoproliferativos crónicos de célula B, empleando citometría de flujo multiparamétrica, pruebas citogenéticas y serológicas, encuesta de hábitos de vida y seguimiento a dos años.Resultados. La frecuencia encontrada de linfocitosis monoclonal B fue del 8 %, con predominio del sexo femenino y edad avanzada, incrementándose al 12,5 % en individuos con antecedentes familiares de leucemia linfocítica crónica. Tres de cuatro individuos presentaron inmunofenotipo de tipo leucemia linfocítica crónica, todas con bajo recuento. A su vez, en estos individuos se observa de manera significativa un mayor número de células/µl en subpoblaciones linfocitarias T, junto con mayor predisposición a la enfermedad. Las poblaciones clonales descritas aumentan a lo largo del tiempo de manera no significativa.Conclusiones. La frecuencia y comportamiento de la linfocitosis monoclonal de célula B en pacientes con antecedentes familiares de síndromes linfoproliferativos crónicos B es similar a lo encontrado en estudios relacionados,lo que sugiere que no existe afectación degenes de mayor relevancia que puedan desencadenar una proliferación clonal descontrolada, pero que generan desregulación inmunológica que podría indicar un mayor riesgo de infección grave en estos individuos.
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Leucemia Linfocítica Crônica de Células B , Linfocitose , Humanos , Linfocitose/epidemiologia , Linfocitose/genética , Leucemia Linfocítica Crônica de Células B/epidemiologia , Leucemia Linfocítica Crônica de Células B/genética , Linfócitos B , Colômbia/epidemiologia , Citometria de FluxoRESUMO
RESUMO O conhecimento precoce da sorologia do HIV/IST favorece a adoção de medidas preventivas. Estruturas móveis de atendimento conseguem ampliar as testagens, principalmente em populações de difícil acesso. Neste artigo, apresentamos informações básicas coletadas em uma ação de testagem móvel para HIV, sífilis e hepatites virais realizada entre 02/2016 e 06/2017 em Niterói, Rio de Janeiro, descrevemos alguns desafios da implementação e discutimos a importância da interdisciplinaridade no enfrentamento das IST/HIV. A soroprevalência do HIV foi de 1,6%, variando com o mês e a localização da unidade móvel. A maior parte da população atendida era de homens (2.323/58,4%), de raça negra (2.375/60,1%) e com faixa etária entre 20-29 anos (1.706/42,9%). A prevalência total de sífilis foi de 12,8% (20,5% no Jardim São João). Cerca de 21% dos/as usuários/as já haviam testado para o HIV antes e quase 40% referia uma exposição para a testagem atual (97,5% sexual). IST prévia era referida por 9,6% das pessoas atendidas. Nossos dados parecem indicar que a ação atingiu uma população com maior risco para adquirir o HIV. A relação de horizontalidade entre as três esferas de governo que pautou a experiência permitiu a valorização dos diferentes saberes, ampliando as perspectivas para identificar e propor soluções.
ABSTRACT Early knowledge of HIV/STI serology favors the adoption of preventive measures. Mobile service structures are able to expand testing, especially in hard-to-reach populations. In this article, we present basic information collected in a mobile testing action for HIV, syphilis and viral hepatitis carried out between 02/2016 and 06/2017 in Niterói, Rio de Janeiro, we describe some implementation challenges and discuss the importance of interdisciplinarity in facing the challenges of STI/HIV. HIV seroprevalence was 1.6%, varying with the month and location of the mobile unit. Most of the included population was male (2,323/58.4%), black (2,375/60.1%) and aged between 20-29 years (1,706/42.9%). The total prevalence of syphilis was 12.8% (20.5% in Jardim São João). About 21% of users had tested for HIV before and almost 40% reported a current exposure for testing (97.5% sexual). Previous STI was reported by 9.6% of the people assisted. Our data seem to indicate that the action reached a population most at risk of acquiring HIV. The horizontal relationship between the three spheres of government that guided the experience allowed the appreciation of different knowledge, expanding perspectives to identify and propose solutions.
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Objetivo: la sensibilidad subóptima de las pruebas coproparasitológicas dificulta el diagnóstico de la estrongiloidiasis. Los métodos serológicos son más sensibles, pero los estudios en pacientes inmunodeprimidos son escasos. El objetivo del estudio fue de evaluar la sensibilidad de una prueba ELISA comercial en pacientes inmunodeprimidos. Métodos: se realizó en Bolivia un estudio multicéntrico en pacientes con cáncer, VIH, enfermedades reumatológicas y hematológicas. 88 pacientes con larvas de S.stercoralis en heces identificadas mediante técnicas coproparasitológicas tuvieron una prueba serológica ELISA (Bordier Affinity Products). Resultados: la sensibilidad de la técnica ELISA fue de 77,3% (61/88) (CI95%: 67,7-85,1). La sensibilidad de este test serológico fue identificada más baja en pacientes HIV+ con CD4300 o una serología VIH desconocida (84,2%) (p=0,035). Conclusiones: la sensibilidad del ELISA es inversamente proporcional al grado de inmunosupresión. Este resultado refuerza la recomendación de diagnosticar la estrongiloidiasis mediante una combinación de técnicas serológicas y coproparasitológicas.
Objectives: the sensitivity of coproparasitological tests for the diagnosis of strongyloidiasis are suboptimal. Serological methods are more sensitive, but studies among immunocompromised patients are scarce. The aim of this study was to evaluate the sensitivity of a commercial ELISA test among immunocompromised patients. Methods: a multicenter study was conducted in Bolivia among patients with cancer, HIV, rheumatologic or hematologic diseases. 88 patients with S. stercoralis larvae in stool identified by coproparasitological techniques had an ELISA serological test (Bordier Affinity Products). Results: the sensitivity of the ELISA technique was 77,3% (61/88) (CI95%: 67,7-85,1), and was identified lower among HIV+ patients with CD4300 or unknown HIV serology (84,2%) (p=0,035). Conclusions: the sensitivity of ELISA is inversely proportional to the degree of immunosuppression. This result reinforces the recommendation to diagnose strongyloidiasis by a combination of serological and coproparasitological techniques.