Internal carotid artery dissection associated with acute dengue virus infection: a case report / Dissecção da artéria carótida interna associada à infecção aguda pelo vírus da dengue: relato de caso

Cervical artery dissections (CAD) can occur spontaneously or as a direct result of significant trauma. Viral infections, such as SARS-CoV2, influenza, and Epstein Barr, are risk factors for spontaneous CAD. Dengue virus infections have dramatically increased in recent decades, and Brazil is one of the endemic areas. The dengue virus can cause headache and neurological complications such as encephalitis, myelitis, Guillain-Barré syndrome, and myositis. No report has yet been found in the literature of dissection of the internal carotid artery secondary to dengue infection. Our objective is to report the case of a patient with dissection of the internal carotid artery associated with acute dengue virus infection.

As dissecções da artéria cervical (DAC) podem ocorrer espontaneamente ou como resultado direto de trauma significativo. Infecções virais, como SARS-CoV2, influenza e Epstein Barr, são fatores de risco para DAC espontânea. As infecções pelo vírus da dengue aumentaram dramaticamente nas últimas décadas, e o Brasil é uma das áreas endêmicas. O vírus da dengue pode causar dor de cabeça e complicações neurológicas como encefalite, mielite, síndrome de Guillain-Barré e miosite. Ainda não foi encontrado na literatura nenhum relato de dissecção da artéria carótida interna secundária à infecção por dengue. Nosso objetivo é relatar o caso de um paciente com dissecção da artéria carótida interna associada à infecção aguda pelo vírus da dengue.

Analysis of the characteristics of viral infections in children with diarrhea in Beijing from 2018 to 2022 / 中华预防医学杂志

Objective: To explore the characteristics of viral infections in children with diarrhea in Beijing from 2018 to 2022. Methods: Real-time PCR and enzyme-linked immunosorbent assay were used to detect viral nucleic acid of Norovirus (NoV), Sappovirus (SaV), Astrovirus (AstV), Enteric Adenovirus (AdV) or antigen of Rotavirus (RV) in 748 stool samples collected from Beijing Capital Institute of Pediatrics from January 2018 to December 2021. Subsequently, the reverse transcription PCR or PCR method was used to amplify the target gene of the positive samples after the initial screening, followed by sequencing, genotyping and evolution analysis, so as to obtain the characteristics of these viruses. Phylogenetic analysis was performed using Mega 6.0. Results: From 2018 to 2021, the overall detection rate of the above five common viruses was 37.6%(281/748)in children under 5 years old in Beijing. NoV, Enteric AdV and RV were still the top three diarrhea-related viruses, followed by AstV and SaV, accounting for 41.6%, 29.2%, 27.8%, 8.9% and 7.5%, respectively. The detection rate of co-infections with two or three diarrhea-related viruses was 4.7% (35/748). From the perspective of annual distribution, the detection rate of Enteric AdV was the highest in 2021, while NoV was predominant in the other 4 years. From the perspective of genetic characteristics, NoV was predominant by GⅡ.4, and after the first detection of GⅡ.4[P16] in 2020, it occupied the first two gene groups together with GⅡ.4[P31]. Although the predominant RV was G9P[8], the rare epidemic strain G8P[8] was first detected in 2021. The predominant genotypes of Enteric AdV and AstV were Ad41 and HAstV-1. SaV was sporadic spread with a low detection rate. Conclusion: Among the diarrhea-related viruses infected children under 5 years of age in Beijing, the predominant strains of NoV and RV have changed and new sub-genotypes have been detected for the first time, while the predominant strains of AstV and Enteric AdV are relatively stable.

"É difícil temer aquilo que não podemos ver": o trabalho representacional da Covid-19 e a pedagogia do medo entre vírus e animações / "It's hard to fear something we can't see": the representational work of Covid-19 and the pedagogy of fear between viruses and animacies

Resumo A mais recente pandemia, caracterizada como SARS-CoV-2, se insere em uma linhagem conhecida de patógenos virais que podem desencadear infecções respiratórias severas. Em que pese a importância de se avançar no conhecimento biomédico como forma de garantir o tratamento e a eficácia na suposta erradicação da doença, não é menos urgente refletir acerca das circunstâncias sociais que modelam essa nova situação epidemiológica. Este ensaio analisa como as representações sobre e contágio e morte imbricadas na díade saúde-doença, como fenômenos tradicionais, se revestiram de proposições morais, particularmente entre os meses de janeiro e março de 2020, quando as definições de surto, epidemia e pandemia se tornaram inextricavelmente misturadas. Naquele contexto, e a partir da criação de um tipo de dispositivo de saúde animado por imperativos afeitos à forma mais mortal da doença, a Covid-19 ganhou materialidade. Constituído na confluência de concepções étnico-racializantes, este dispositivo pedagogizou as primeiras imagens da doença, sedimentadas em uma gramática altamente visual e linguística afeitas a um medo coletivo. Examinamos que o trabalho de recepção, nomeação e enquadramento da Covid-19 dependeu de regimes de visibilidade condicionados por processos tradicionais, relativos à materialização e animação do vírus enquanto uma ameaça não só epidemiológica e social, mas política e moral.

Abstract The most recent pandemic, characterized as SARS-CoV-2, is part of a known lineage of viral pathogens that can trigger severe respiratory infections. Despite the importance of advancing biomedical knowledge as a way to guarantee treatment and effectiveness in the supposed eradication of the disease, it is no less urgent to reflect on the social circumstances that shape this new epidemiological situation. This essay analyzes how the representations of contagion and death imbricated in the health-disease dyad, as traditional phenomena, took on moral propositions, particularly between the months of January and March 2020, when the definitions of outbreak, epidemic and pandemic became inextricably mixed. In that context, and from the creation of a type of health apparatus animated by imperatives related to the deadliest form of the disease, Covid-19 gained materiality. Constituted at the confluence of ethnic-racializing conceptions, this apparatus formed the first visual and linguistic images of the disease. Finally, this article examines that the work of reception, appointment and framing of Covid-19 depended on visibility regimes conditioned by traditional processes, related to the materialization and animation of the virus as a threat not only epidemiological and social, but political and moral.

Modelo computacional interactivo, semi-automatizado y de código abierto aplicado a la vigilancia de virus respiratorios / Interactive, semi-automatized and open source computational model applied to respiratory viruses surveillance

Resumen Las infecciones respiratorias agudas (IRA) causadas por virus son una importante causa de morbilidad y mortalidad en el mundo, afectando principalmente a niños y adultos mayores. Se asocian a un alto número de consultas y hospitalizaciones, a una significativa sobrecarga del sistema de salud y a un alto costo económico. La vigilancia de virus respiratorios tiene el potencial de ayudar a optimizar la respuesta sanitaria, garantizar la disponibilidad de recursos humanos, racionalizar los recursos y disminuir los costos asociados a la atención en salud. Con el objetivo de optimizar la recolección y visualización de los datos de nuestro actual sistema de vigilancia de virus respiratorios, se diseñó una plataforma basada en R y sus paquetes Shiny, que permite la creación de una interfase web interactiva y amigable para la recolección, análisis y publicación de los datos. Se ingresaron a esta plataforma los datos de la red de vigilancia metropolitana de virus respiratorios disponibles desde 2006. En esta plataforma, el investigador demora menos de un minuto en registrar los datos. El análisis y publicación es inmediato, llegando a cualquier usuario con un dispositivo conectado a Internet, quien puede elegir las variables a consultar. Con un costo muy bajo, en poco tiempo y utilizando el lenguaje de programación R, se logró crear un sistema simple e interactivo, disminuyendo el tiempo de carga y análisis de datos de forma considerable, posiblemente aumentando el impacto y la disponibilidad de esta vigilancia.

Abstract Acute respiratory infections (ARI) are an important cause of morbidity and mortality worldwide, affecting mainly children and the elderly. They are associated with a high economic burden, increased number of medical visits and hospitalizations. The surveillance of the circulation of respiratory viruses can reduce the health care associated costs, and to optimize the health response. A platform based on R and its package Shiny was designed, to create an interactive and friendly web interface for gathering, analysis and publication of the data. The data from the Chilean metropolitan respiratory viruses surveillance network, available since 2006, was uploaded into the platform. Using this platform, the researcher spends less than 1 minute to upload the data, and the analysis and publication is immediate, available to be seen by any user with a device connected to Internet, who can choose the variables to be displayed. With a very low cost, in a short time, and using the R programming language, it was possible to create a simple, and interactive platform, considerably decreasing the upload and analysis time, and increasing the impact and availability of this surveillance.

La sostenibilidad del sistema de salud y el mercado farmacéutico: Una interacción permanente entre el costo de los medicamentos, el sistema de patentes y la atención a las enfermedades / The sustainability of the health system and the pharmaceutical market: A permanent interaction between the cost of medications, the patent system, and disease care

RESUMEN Ante la amenaza latente de futuras pandemias, este estudio tiene como objetivo analizar -desde el eje de los medicamentos- la sostenibilidad del sistema sanitario, la cobertura, la eficiencia del gasto y su vinculación al sistema de patentes farmacéuticas. En este marco, el sistema de patentes farmacéuticas adquiere un papel determinante, dado que fomentar su existencia estimula la producción de investigación pero, a su vez, su existencia no suscita un rápido avance, debido al desarrollo legislativo protector que han tenido las patentes y que ha dado lugar a un acomodamiento de la industria. Como la industria farmacéutica ha conseguido extender la duración de patentes y evitar la incorporación de genéricos, se analiza la influencia de las patentes farmacéuticas que ha dado lugar a reflexionar acerca de la posibilidad de consorciar esfuerzos realizando alianzas entre varias empresas y el sector público para afrontar los retos que plantean nuevas enfermedades producidas por virus que dan lugar a epidemias y pandemias.

ABSTRACT Taking into account the latent threat of future pandemics, the objective of this study is to analyze - particularly with respect to medications - the sustainability of the health system, healthcare coverage, budgetary efficiency, and connections with the pharmaceutical patent system. In this context, the pharmaceutical patent system acts as a determining factor, given that promoting its existence stimulates the production of research, but in turn its existence stands in the way of rapid advancements, primarily due to the development of protective legislation concerning patents, which has largely accommodated the industry. Given that the pharmaceutical industry has managed to extend the duration of patents and avoid the incorporation of generics, our analysis focuses on the influence of pharmaceutical patents; this influence has led to reflection on the possibility of combining efforts by forging alliances between numerous companies and the public sector in order to face the challenges posed by new diseases caused by viruses that give rise to epidemics and pandemics.

Etiología viral de las infecciones respiratorias agudas graves en una unidad de cuidados intensivos pediátricos / Viral etiology of severe acute respiratory infections in a pediatric intensive care unit

RESUMEN Objetivos. Identificar los principales agentes etiológicos virales en pacientes con infección respiratoria aguda grave (IRAG) hospitalizados en una Unidad de Cuidados Intensivos Pediátricos (UCIP) y analizar sus características clínicas. Materiales y métodos. Estudio longitudinal prospectivo en menores de cinco años hospitalizados por IRAG en la UCIP del Instituto Nacional de Salud del Niño en Lima, Perú. Se realizaron pruebas de inmunofluorescencia directa y RT-PCR en tiempo real para el diagnóstico de virus respiratorios en muestras de aspirado traqueal o hisopado nasofaríngeo. Resultados. Se incluyeron 117 pacientes. La mediana de edad fue cuatro meses, el 66% presentaron comorbilidad y el 91% requirieron ventilación mecánica. Se identificó monoinfección por virus respiratorios en el 47% y coinfección viral en el 2,6%, siendo el virus sincicial respiratorio subtipo A (VSR-A) el más frecuente. La mediana del tiempo de hospitalización fue de 21 días y 20 (17%) pacientes fallecieron. Se encontró asociación entre el antecedente de enfermedad pulmonar crónica y la infección por el VSR-A (p=0,045) y entre el síndrome de Down y la infección por virus influenza A (p=0,01). Después de controlar por potenciales factores de confusión, se halló que la cardiopatía congénita (RR: 3,1; IC 95%: 1,3-5,8; p=0,002) y la infección nosocomial (RR: 2,6; IC 95%: 1,0-5,3; p=0,01) incrementaron el riesgo de muerte en pacientes con IRAG. Conclusiones. El VSR-A fue la etiología viral más frecuente en menores de cinco años hospitalizados por IRAG en la UCIP. No se encontró asociación entre la infección viral y la sobrevida del paciente.

ABSTRACT Objectives. To identify the main viral etiological agents in patients with severe acute respiratory infection (SARI) hospitalized in a Pediatric Intensive Care Unit (PICU) and to analyze their clinical characteristics. Materials and Methods. Prospective longitudinal study in children under five years of age hospitalized due to SARI at the PICU of t Instituto Nacional de Salud del Niño (National Children´s Hospital) in Lima, Peru. Real-time direct immunofluorescence and RT-PCR tests were performed for the diagnosis of respiratory viruses on tracheal aspirate or nasopharyngeal swab samples. Results. We included 117 patients. Median age was four months, 66% had comorbidity and 91% required mechanical ventilation. Respiratory virus monoinfection was identified in 47% and viral co-infection in 2.6%, with the respiratory syncytial virus subtype A (RSV-A) being the most frequent. The median length of hospitalization was 21 days and 20 (17%) patients died. An association was found between a history of chronic lung disease and RSV-A infection (p=0.045), and between Down syndrome and influenza A virus infection (p=0.01). After controlling for potential confounders, congenital heart disease (RR 3.1; 95% CI: 1.3-5.8, p=0.002) and nosocomial infection (RR 2.6; 95% CI: 1.0-5.3, p=0.01) were found to increase the risk of death in patients with SARI. Conclusions. RSV-A was the most common viral etiology in children under five hospitalized by SARI at the PICU. No association was found between viral infection and patient survival.

Infecciones virales en receptores de trasplante alogénico de células progenitoras hematopoyéticas / Viral infections in allogeneic hematopoietic stem cell transplantation recipients

Introducción: El Trasplante alogénico de células progenitoras hematopoyéticas (TCPH) se asocia a una lenta recuperación de sistema inmune, lo que predispone a sus receptores a presentar múltiples complicaciones infecciosas. En este trabajo se analizan las infecciones virales de una cohorte retrospectiva. Material y métodos: se revisó la base de datos del servicio y se registraron las infecciones virales del periodo 2012-2016. Resultados: n 215. El 91% de los receptores y el 70% de los donantes eran CMV positivos antes del trasplante, el 47% de os receptores presentó reactivación de CMV y el 10% enfermedad, con una mortalidad directa del 3,1%. El 87% de los receptores y el 70% de los donantes tenían serología para EBV y el 13% tuvieron una reactivación con una carga viral > 20.000 copias/ml. El 11% de los pac tuvieron enfermedad por Herpes zoster, el 6% por Herpes 6 y el 5% por Herpes simple. Se detectó infección por adenovirus en el 25% de los pacientes, siendo el compromiso más frecuente el digestivo, seguido de la infección respiratoria baja. La mortalidad directa por adenovirus fue 5,1%. Se registraron 41 episodios de infección respiratoria aguda baja por virus respiratorios, con una mortalidad directa del 4%. El 18% de los pac tuvo cistitis hemorrágica por virus BK, con viremia asociada en el 41% de los casos. El 6% de los pacientes presentó falla hematológica asociada a Parvovirus, que un caso fue causa de la pérdida del injerto. Conclusión: las enfermedades virales son una complicación muy frecuente del TCPH y con gran peso en la mortalidad relacionada al trasplante. Los avances terapéuticos han sido menores que los alcanzados en los métodos diagnósticos (AU)

Introduction: Allogeneic hematopietic stem cell transplantation (HSCT) is associated with a slow recovery of the immune system leading to multiple infectious complications. In this study viral infections are evaluated in a retrospective cohort. Material and methods: The data base of the department was reviewed recording viral infections that occurred between 2012-2016. Results: n 215; 91% of the recipients and 70% of the donors were CMV prior to the transplant; 47% of the recipients had a CMV reactivation and 10% developed the disease with a related mortality of 3.1%. Overall, 87% of the recipients and 70% of the donor had a positive serology for EBV and 13% had a reactivation with a viral load of > 20,000 copies/ml. Of the patients, 11% had Herpes zoster, 6% Herpes 6, and 5% Herpes simplex. Adenovirus infection was detected in 25% of the patients, most commonly involving the digestive tract followed by lower respiratory tract infection. Adenovirusrelated mortality was 5.1%. Forty-one acute lower respiratory tract infections due to respiratory viruses were recorded leading to a mortality of 4%. Of all the patients, 18% had BK virus-related hemorrhagic cystitis with associated viremia in 41% of the cases. Six percent of the patients had parvovirusassociated hemotologic failure leading to graft loss in one case. Conclusion: Viral diseases are a very frequent complication in HSCT with a high transplant-related mortality. Advances in therapy have lagged behind advances in diagnostic methods (AU)

Análise da prevalência de vírus respiratórios em crianças atendidas em um hospital universitário do sul de Minas Gerais / Analysis of respiratory virus prevalence in assisted children in a university hospital of southern of minas gerais

INTRODUÇÃO: As infecções respiratórias virais são doenças de alta incidência no nosso meio. Os vírus circulam durante todo ano, todavia, a incidência destas infeccões aumentam com a sazonalidade. Grande parte destas infecções ocorrem em crianças por serem mais susceptíveis do ponto de vista imunológico. OBJETIVO: Analisar a prevalência dos patógenos virais nas infecções respiratórias em crianças de 0 a 9 anos no Hospital das Clinicas Samuel Libanio(HCSL), Pouso Alegre - MG. MÉTODOS: Foi realizada uma revisão sistemática dos dados coletados a partir de aspirados de orofaringe, para pesquisa de vírus pela equipe da Comissão de Controle de Infecções Hospitalares (CCIH), entre os anos de 2010 e 2014. RESULTADOS: Foram analisados 310 amostras e cerca de 26,4% foram positivas para algum vírus. O vírus sincicial respiratório (VSR) foi o mais prevalente nas crianças menores de um e também na faixa etária de 1 a 4 anos (25,3% e 11,1 %, respectivamente), estatisticamente significante (p<0,001). Já no grupo entre 5 a 9 anos prevaleceu o virus Influenza A H1N1 com 13,8%. CONCLUSÃO: As infecções virais contribuem para um alto número de hospitalizações que oneram o serviço público de saúde, principalmente na faica etária pediátrica. Deste modo, medidas preventiva como campanhas de vacinação devem continuar a ser incentivadas, de preferência abrangendo os vírus mais prevalentes para uma determinada faixa etária. (AU)

Introduction: Viral respiratory infections are of high incidence diseases in our midst. Viruses circulate throughout the year, however, the incidence of these infections increase with seasonality. Most of these infections occur in children because they are more likely immunologically. Objective: To analyze the prevalence of viral pathogens in respiratory infections in children aged 0 to 9 years old at the Samuel Libânio Clinical Hospital, Pouso Alegre-MG. Methods: A systematic review of data collected from aspirates oropharynx was performed to search for viruses by the Commission's Team of Nosocomial Infection Control between the years 2010 and 2014. Results: 310 samples were analyzed and about 26.4% of the samples were positive for a virus. Respiratory syncytial virus (RSV) was the most prevalent in children under one year old and also in the age group 1-4 years (25.3% and 11.1%, respectively), statistically significant (p<0.001). In the group between 5 and 9 years prevailed the virus Influenza A H1N1 with 13.8%. Conclusions: Viral infections contribute to a high number of hospitalizations that burden the public health system, especially in the pediatric age group. Thus, preventive measures such as vaccination campaigns should continue to be encouraged, preferably covering the most prevalent virus for a certain age group (AU)

Mosquito-transmitted viruses - the great Brazilian challenge

ABSTRACT Arboviruses pose a serious threat to public health worldwide, overloading the healthcare system and causing economic losses. These viruses form a very diverse group, and in Brazil, arboviruses belonging to the families Flaviviridae and Togaviridae are predominant. Unfortunately, the number of arboviruses increases in proportion with factors such as deforestation, poor sanitation, climate changes, and introduction of new viruses like Chikungunya virus and Zika virus. In Brazil, dengue is endemic, along with the presence of other arboviruses. The situation is complicated by the scarcity of diagnostic infrastructure and the absence of approved vaccines for these diseases. Disease control, thus, relies solely on vector control. Therefore, enhanced clinical knowledge and improved general awareness about these arboviruses are indispensable to tackle diagnostic inadequacies.

Infecções de transmissão sexual em adolescentes e jovens do sexo feminino / Sexually transmitted infections in female adolescents and young people

As infecções de transmissão sexual constituem importante problema de saúde pública, por apresentarem taxas elevadas de prevalência, de transmissibilidade e de complicações. Adquirem importância por acarretarem aumento na transmissibilidade do vírus da imunodeficiência humana (HIV). A infecção de transmissão sexual mais frequente é a infecção pelo Papilomavírus humano (HPV). Esta acarreta, nestas faixas de idade, na maioria das vezes, anormalidade citológicas de baixo grau, que tendem à regressão espontânea. A segunda infecção de maior prevalência é a infecção, pela Chlamydia trachomatis (C trachomatis). Dentre as complicações associadas a essa infecção têm destaque a doença inflamatória pélvica, a gravidez ectópica, a infertilidade tubária e a transmissão vertical. As outras infecções de transmissão sexual, embora de menor prevalência, são também preocupantes. Os fatores de risco para aquisição destas infecções são o número de parceiros, a idade jovem e o sexo feminino. Estes dados apontam para a necessidade de um programa de educação integrado a uma abordagem em saúde pública direcionados à prevenção primária e ao rastreamento, com ênfase nas infecções pelo HPV e C trachomatis entre adolescentes e adultos jovens.(AU)

Sexually transmitted infections are major public health problems because they have high prevalence and transmission rates, and number of complications and sequelae. As a consequence of increased in HIV transmission, this condition is of most importance. The most frequent sexually transmitted disease is the human papillomavirus (HPV) infection. Cytological abnormalities induced by HPV infection are low-grade and tend to regression in young adult group. The second most prevalent disease is Chlamydia trachomatis (C. trachomatis) infection. The complications associated with C. trachomatis infection are pelvic inflammatory disease, ectopic pregnancy, tubal infertility, and vertical transmission. Other sexually transmitted infections, though less prevalent, are also worrying. The risk factors for these infections are the number of sexual partners, young age, and female sex. These data point to the need for an integrated education program to a public health approach, aimed at primary prevention and screening, with emphasis on the C. trachomatis infection among adolescents and young people.(AU)

La relación entre obesidad y complicaciones en el curso clínico de las enfermedades respiratorias virales en niños ¿un nuevo factor de riesgo a considerar? / Obesity as a risk factor for complications during acute respiratory infections in children

Obesity has a high prevalence among children. On the other hand, acute respiratory infections especially of viral origin, are an important cause of morbidity and mortality in this age group. During the recent pandemic of influenza A (H1N1) virus, obesity was identified as a novel independent risk factor for severity multiple markers of the disease. We reviewed the evidence associating obesity with a worse course of respiratory diseases in children. Nine out of 40 retrieved articles, were chosen to be reviewed. We concluded that there is evidence suggesting that immunomodulatory effects of obesity could be considered as a novel risk factor. Thus, bearing in mind the drastic rise in obesity prevalence around the world and in Chile, and the latent possibility of new respiratory pandemics caused by viruses, studying the possible effect of obesity aggravating viral respiratory infections will become important.