Dentistry vs Severe Acute Respiratory Syndrome Coronavirus 2: How to face this enemy / Odontologia vs Síndrome Respiratória Aguda Severa Coronavirus 2: Como enfrentar o inimigo

ABSTRACT Since the beginning of the SARS-CoV-2 pandemic, numerous restrictive measures have been taken by the governments of different countries. Recently, due to the high possibility of transmission in dental offices, there was a recommendation by the American, European and Brazilian governments to request the closing of the offices. In this commentary, we will give an overview of the reasons and perspectives of this scenario.

Tracking excess deaths associated with the COVID-19 epidemic as an epidemiological surveillance strategy-preliminary results of the evaluation of six Brazilian capitals

Abstract INTRODUCTION: In March 2020, the World Health Organization declared the coronavirus disease (COVID-19) outbreak a pandemic. In Brazil, 110 thousand cases and 5,901 deaths were confirmed by the end of April 2020. The scarcity of laboratory resources, the overload on the service network, and the broad clinical spectrum of the disease make it difficult to document all the deaths due to COVID-19. The aim of this study was to assess the mortality rate in Brazilian capitals with a high incidence of COVID-19. METHODS: We assessed the weekly mortality between epidemiological week 1 and 16 in 2020 and the corresponding period in 2019. We estimated the expected mortality at 95% confidence interval by projecting the mortality in 2019 to the population in 2020, using data from the National Association of Civil Registrars (ARPEN-Brasil). RESULTS: In the five capitals with the highest incidence of COVID-19, we identified excess deaths during the pandemic. The age group above 60 years was severely affected, while 31% of the excess deaths occurred in the age group of 20-59 years. There was a strong correlation (r = 0.94) between excess deaths and the number of deaths confirmed by epidemiological monitoring. The epidemiological surveillance captured only 52% of all mortality associated with the COVID-19 pandemic in the cities examined. CONCLUSIONS: Considering the simplicity of the method and its low cost, we believe that the assessment of excess mortality associated with the COVID-19 pandemic should be used as a complementary tool for regular epidemiological surveillance.

Estimated mortality rate and leading causes of death among individuals with chikungunya in 2016 and 2017 in Brazil

Abstract INTRODUCTION: In 2014, the first cases of autochthonous chikungunya (CHIK) were recorded in Brazil. Lethality associated with this disease is underestimated. Thus, this study aimed to analyze the causes of death among individuals with CHIK in Brazil. METHODS: A descriptive observational study was conducted on individuals with CHIK who died within 6 months from symptom onset. Data pairing between the Information System for Notifiable Diseases and the Mortality Information System was performed. Deaths were classified according to case confirmation criterion, mention of CHIK in the death certificates (DCs), and disease phase. The lethality rate per 1,000 cases was corrected for underreporting and was estimated according to region, sex, age, years of education, race/color, and cause groups. RESULTS: We identified 3,135 deaths (mention of CHIK in the DCs, 764 [24.4%]). In 17.6% of these cases, CHIK was the underlying cause. Most deaths occurred in the acute (38.1%) and post-acute (29.6%) phases. The corrected LR (5.7; x1,000) was 6.8 times higher than that obtained from the Information System for Notifiable Diseases (0.8). The highest corrected LRs were estimated for among individuals living in the Northeast region (6.2), men (7.4), those with low years of education and those aged <1 year (8.6), 65-79 years (20.7), and ≥80 years (75.4). CONCLUSIONS: The LR of CHIK estimates based on information system linkage help to reveal the relevance of this disease as the direct cause or as a cause associated with serious or fatal events, provide timely interventions, and increase the knowledge about this disease.

Surveillance of deaths caused by arboviruses in Brazil: from dengue to chikungunya

Did death occur DUE TO dengue, or in a patient WITH dengue virus infection? It seems a matter of semantics, but in fact, it underscores how challenging it is to distinguish whether the disease contributed to death, or was itself the underlying cause of death. Can a death be attributed to chikungunya virus, when some deaths occur after the acute phase? Did the virus decompensate the underlying diseases, leading to death? Did prolonged hospitalisation lead to infection, resulting in the patient's progression to death? Were there iatrogenic complications during patient care? The dengue question, for which there has not yet been a definitive response, resurfaces prominently under the chikungunya surveillance scenario. We are facing an epidemic of a disease that seems to be more lethal than previously thought. The major challenge ahead is to investigate deaths suspected of occurring due to arbovirus infections and to understand the role of each infection in the unfavourable outcome.

Arboviruses emerging in Brazil: challenges for clinic and implications for public health / Arboviroses emergentes no Brasil: desafios para a clínica e implicações para a saúde pública

ABSTRACT Arboviruses have been emerging in different parts of the world due to genetic changes in the virus, alteration of the host and vector population dynamics, or because of anthropogenic environmental factors. These viruses’ capacity for adaptation is notable, as well as the likelihood of their emergence and establishment in new geographic areas. In Brazilian epidemiologic scenario, the most common arboviruses are DENV, CHIKV, and ZIKV, although others may spread in the country. Little is yet known of the impact of viral co-circulation, which would theoretically result in more intense viremia or other immunological alterations that could trigger autoimmune diseases, such as Guillain-Barré syndrome. The impact on morbidity and mortality intensifies as extensive epidemics lead to a high number of affected individuals, severe cases, and implications for health services, mainly due to the absence of treatment, vaccines, and effective prevention and control measures.

RESUMO Notifica-se a emergência de arboviroses em diferentes regiões do planeta em decorrência de mudanças genéticas no vírus, alteração da dinâmica populacional de hospedeiros e vetores ou por fatores ambientais de origem antropogênica. É notável a capacidade de adaptação desses vírus e a possibilidade de emergirem e se estabelecerem em novas áreas geográficas. No contexto epidemiológico brasileiro, os arbovírus de maior circulação são DENV, CHIKV e ZIKV, embora existam outros com potencial de disseminação no País. O impacto da cocirculação viral ainda é pouco conhecido, a qual teoricamente resultaria em viremias mais intensas ou outras alterações imunológicas que poderiam ser o gatilho para doenças autoimunes, como a síndrome de Guillain-Barré. O impacto na morbidade e mortalidade se intensifica à medida que extensas epidemias pressupõem grande número de indivíduos acometidos, casos graves e implicações sobre os serviços de saúde, principalmente diante da ausência de tratamento, vacinas e medidas efetivas de prevenção e controle.

Respiratory syncytial virus seasonality in Brazil: implications for the immunisation policy for at-risk populations

Respiratory syncytial virus (RSV) infection is the leading cause of hospitalisation for respiratory diseases among children under 5 years old. The aim of this study was to analyse RSV seasonality in the five distinct regions of Brazil using time series analysis (wavelet and Fourier series) of the following indicators: monthly positivity of the immunofluorescence reaction for RSV identified by virologic surveillance system, and rate of hospitalisations per bronchiolitis and pneumonia due to RSV in children under 5 years old (codes CID-10 J12.1, J20.5, J21.0 and J21.9). A total of 12,501 samples with 11.6% positivity for RSV (95% confidence interval 11 - 12.2), varying between 7.1 and 21.4% in the five Brazilian regions, was analysed. A strong trend for annual cycles with a stable stationary pattern in the five regions was identified through wavelet analysis of the indicators. The timing of RSV activity by Fourier analysis was similar between the two indicators analysed and showed regional differences. This study reinforces the importance of adjusting the immunisation period for high risk population with the monoclonal antibody palivizumab taking into account regional differences in seasonality of RSV.

Schistosomal myeloradiculopathy in a low-prevalence area: 27 cases (14 autochthonous) in Campinas, São Paulo, Brazil

Schistosomal myeloradiculopathy (SMR) is a form of schistosomiasis that is not linked with a high worm burden but rather is found in patients who have been sporadically exposed to Schistosoma mansoni. This paper aims to determine the occurrence of SMR in a low-endemic area with urban transmission in Campinas, São Paulo, Brazil. A retrospective study was performed, identifying confirmed cases in the two largest public hospitals on the region. Patients were diagnosed with SMR using standardised criteria, common clinical parameters, evidence of schistosomal infection and exclusion of other causes of myelopathy. A total of 27 patients were identified; 19 (85.2 percent) were men and four (14.8 percent) were women, ranging from 13-57 years of age (mean = 31.2; standard deviation = 12.8). Patients were classified as autochthonous (n = 14; 51.9 percent) or allochthonous (n = 11; 40.7 percent) and epidemiological data could not be obtained for two patients (7.4 percent). The clinical parameters of these patients were not different from previous studies. The sensitivity of serum immune reactions, cerebrospinal fluid immune reactions and parasitological stool examinations in identifying infected individuals was 87.5 percent, 93.8 percent and 40 percent, respectively. The epidemiological importance of these findings and their relationship with the control policies of schistosomiasis are discussed.

Investigação sobre a ocorrência de esquistossomose mansônica medular autóctone em uma região com baixa endemicidade(Campinas-SP) / Study on the occurrence of Schistosomiasis Mansoni in a low endemic area (Campinas, SP)

Os programas de controle da esquistossomose têm obtido relativo sucesso ao controlar a morbidade relacionada a altas cargas parasitárias desta doença, sem, no entanto, diminuir a área de transmissão no Brasil. Como a neuroesquistossomose medular á uma forma grave de esquistossomose não relacionada a altas cargas parasitárias existe risco teórico de ocorrer em áreas de baixa endemicidade. O objetivo deste estudo foi estudar a ocorrência da NE (neuroesquistossomose) medular em uma região de baixa endemicidade, região de Campinas, estado de São Paulo. Foi feito um estudo retrospectivo, descritivo de base hospitalar com busca ativa em múltiplas fontes de informação. Utilizou-se como base os dois maiores hospitais públicos da região de Campinas. Os pacientes com diagnóstico de NE medular tiveram seus diagnósticos ratificados por critérios padronizados e baseados em quadro clínico típico, comprovação da infecção por Schistosoma mansoni e exclusão de outras causas de mielopatia. Os pacientes foram classificados como autóctones, importados, sem informação e indeterminado. Após esta classificação os dados clínicos e epidemiológicos foram analisados. Foram identificados 27 pacientes com NE medular dos quais 19 (85,2%) homens e 4 (14,8%) mulheres, as idades no momento do diagnóstico foram de 13 a 57 anos (média=31,2; desvio padrão= 12,8 e mediana=29). Os pacientes foram classificados quanto ao local provável de infecção da seguinte forma: 14(51,9%) autóctones, 11(40,7%) importados e 2(7,4%) sem informações, não houve paciente classificado como indeterminado. Todos os pacientes importados se infectaram em municípios de áreas de alta endemicidade. A clínica deste grupo de pacientes não foi diferente do encontrado na literatura, nem foi diferente quando comparados os pacientes autóctones com os importados. Houve uma demora média de 70,6 dias (mediana=19; dp=166,9) entre a primeira consulta e o diagnóstico...

Programs for schistosomiasis control have enjoyed relative success in controlling death associated to high parasitary loads for this illness, without, however, decreasing the area of transmission in Brazil. Since spinal neuroschistosomiasis is a grave form of neuroschistosomiasis unrelated to high parasitary loads, there is a theoretical risk of its occurrence even when not in a particularly endemic area. The goal of this study was to study the occurrence of spinal NE (neuroschistosomiasis) in a non-endemic area, the region of Campinas, in the Sate of São Paulo. A retrospective, descriptive, hospital-based study was carried, with information actively sought after from various sources of information. The two largest public hospitals in the region of Campinas were used as bases. The patients diagnosed with spinal NE had their diagnoses ratified according to standard criteria and based on typical clinical status, proof of infection by Schistosoma mansoni and the exclusion of other causes for myelopathy. Patients were classified as autochthonous, imported, without information and undetermined. After this classification, the clinical and epidemiological data were analyzed. A total of 27 patients with spinal NE were identified, of which 19 (85.2%) were men and 4 (14.8%) women. The ages on diagnosis ranged from 13 to 57 (average=31.2; standard deviation=12.8 and median=29). The patients were classified as to their probable location of infection the following way: 14(51.9%) autochthonous, 11(40.7%) imported and 2(7.4%) without information. No patients were deemed undetermined. All imported patients were infected in municipalities located in highly endemic areas. Clinical evaluation of this group of patients was no different from that found in the literature, nor was it different when autochthonous patients were compared to imported patients. There was an average period of 70.6 days (median=19; sd=166.9) between the first consultation and diagnosis.