Brazilian Community Research Articles

Seroprevalence of Treponema pallidum infection in Brazilian indigenous people: a cross-sectional study

Indigenous communities in Brazil have a complex epidemiological profile, which increases their chances of contracting sexually transmitted diseases. However, limited data is available on Treponema pallidum infections in this population. We investigated the seroprevalence and risk factors associated with T. pallidum infection in an indigenous population of Dourados, Mato Grosso do Sul. Blood samples were collected from September 2017 to March 2020, and the participants were interviewed to obtain comprehensive data on demography and sexual behavior. Serological tests were performed to detect T. pallidum infection. Besides conducting descriptive analysis, we performed Chi-squared tests and determined the bivariate odds ratio. The data were also analyzed using logistic regression. Among the 2190 invited individuals, 1927 (88%) were included in this study. The seroprevalence of T. pallidum infection was 2.91%. The results of a multivariate analysis showed that individuals who were 30–39 years old, with up to 4 years of school education, living in households without piped water, with a history of genital lesions, multiple sexual partners, and having a history of STIs had the highest seroprevalence of T. pallidum. This study showed that behavioral, social, and economic factors play an important role in the transmission of T. pallidum within the indigenous population. Thus, targeted intervention, including imparting education in the native language, mass testing initiatives, and implementing public policies to improve socioeconomic indicators, is needed to reduce the cases of syphilis in this community.

#3010 Characteristics of a Brazilian cohort with primary hyperoxaluria type 1 (PH1), an admixed population with different ethnic origins

Abstract Background and Aims Primary Hyperoxaluria type 1 (PH1) is caused by biallelic variants in the AGXT gene, leading to alanine:glyoxylate aminotransferase deficiency, hepatic overproduction of oxalate, hyperoxaluria, nephrolithiasis (NL), and/or nephrocalcinosis (NC), often progressing to chronic kidney disease (CKD) with variable phenotypes. Brazilian population is unique due to its diverse ancestry and high admixture rate, which makes this population an interesting group to expand clinical and genetic profile of PH1. Method A descriptive study of genetic confirmed PH1 patients from various regions of Brazil, involving demographic, clinical-laboratory, and genetic data. Results Twenty-one patients (17 families) were identified; 4 detected by family screening (2 with active disease). Parental consanguinity detected in 4 families (23.5%). Nineteen symptomatic patients (12 males) included. At PH1 diagnosis, 3 patients were on CKD stage 1, 1 on CKD 3 and 15 were on CKD 5. We observed notable clinical heterogeneity, and 3 groups are described according to the age at onset. Table 1 shows data for each group and symptomatic cases. All patients have received pyridoxine since PH1 diagnosis. Conclusion In this Brazilian cohort we observed a high percentage of patients diagnosed on CKD 5, detected by recurrence in the renal graft after isolated renal transplantation, and patients achieving CKD 5 after obstructive kidney stones episode. Several factors, including the broad phenotypic spectrum, the lack of awareness among physicians about the disease and the scarcity of diagnostic tools, may explain this delay in diagnosis. Therefore, there is a need to improve information to the Brazilian medical community. The genetic findings are similar to European and North America genetic descriptions and 2 novel variants were identified expanding the AGXT variants profile. However, it is noteworthy, the high percentage of compound heterozygous variants compared with other cohorts worldwide, which may be characteristic of an admixed population.

The Personality Inventory for DSM-5-Brief Form (PID-5-BF): Psychometric indicators in a Brazilian community sample

Objective: To investigate psychometric properties (internal structure, convergent/discriminant validity, internal consistency, and test-retest) of the Personality Inventory for DSM-5-Brief Form (PID-5-BF) in a Brazilian community sample. Method: This is a study with a psychometric design. A sample of 527 adults from the general population (69.9% women; 33.5 ± 14.0 years; 74.0% ≥ 12 years education) responded to the instrument online after the study was disseminated on social networks and to the researchers’ contacts. The NEO-PI-R and sociodemographic questionnaire were applied besides the PID-5-BF, and a retest was applied 15-30 days after the initial assessment for reliability assessment. Data were analyzed using statistical techniques (IBM SPSS19 and Factor20); the significance level was set at p ≤ 0.05 for all the analyses. Results: Internal consistency was verified using Cronbach’s alpha and was adequate (domains α ≥ 0.69; total α = 0.87), in addition to test-retest reliability (domains ICC ≥ 0.82; total ICC = 0.95). Divergences were found between the PID-5-BF different domains despite them being significantly correlated with each other. Convergent validity with the NEO-PI-R was adequate, with moderate/strong correlations between the domains theoretically associated (r > 0.38). The internal structure (Exploratory Factor Analysis) indicated that the original five-factor model (CFI = 0.991; TLI = 0.986; RMSEA = 0.033) and one-factor model were adequate (CFI = 0.908; TLI = 0.899; RMSEA = 0.089. Conclusions: The findings support using the PID-5-BF Brazilian version, which presented adequate psychometric properties comparable to the original version. This instrument can be helpful in the clinical and research fields to screen general and specific traits of personality pathology. Future studies are suggested to expand the psychometric findings among clinical samples, confirming the instrument’s scope of reach.

Melissopalynology in Brazilian seacoast mangrove areas, a mini review

Along the Brazilian coast, there are several types of mangroves with a variable predominance of trees of the genera Avicennia and Rizophora, as well as of the Laguncularia racemosa species. Mangrove beekeeping is a potential alternative source of income for many coastal communities in Brazil. Research activities on melissopalynology were initiated on Apis mellifera bees mainly by Barth and Luz in Rio de Janeiro, and with native bees by Kerr et al. in Maranhão States during the last century. Pollen analysis of honey, bee pollen and propolis were presented covering the Brazilian macroregions of the south, southeast, northeast and north. Bees showed preferential interest in Laguncularia racemosa in the southeast region. Studies with native bees are underway in an urban mangrove area of Rio de Janeiro. Laguncularia pollen occurred in reduced proportions in both honey and bee pollen. Avicennia predominated in the northeast region samples. Two samples of honey obtained from indigenous bees in the State of Espírito Santo, one sample from Maranhão and one sample of honey from Apis mellifera from Pernambuco, showed both Laguncularia and Avicennia pollen. All mangrove areas studied clearly showed the importance of Laguncularia racemosa. Studies of propolis highlighted the importance of vegetation along the inner edges of mangroves, such as Dalbergia ecastaphyllum, Schinus terebinthifolia and Symphonia globulifera.

Understanding thermal justice and systemic cooling poverty from the margins: intersectional perspectives from Rio de Janeiro

ABSTRACT Heatwaves, which are escalating in frequency, duration and intensity, have prompted governments worldwide to issue vital health warnings to protect populations. These include urging individuals to stay cool, hydrated, avoid direct sun exposure and minimise strenuous activities. Regrettably, a significant segment of the population faces substantial challenges in accessing these crucial recommendations due to a range of issues termed “systemic cooling poverty”. Systemic cooling poverty encompasses intricate layers of physical, social and intangible infrastructural deficiencies, impeding the provision of essential services necessary to ensure thermal safety during extreme heat episodes. Through an intersectional mixed-method examination, this study brings empirical evidence of the structural factors that exacerbate inequalities in attaining thermal safety among the African–Brazilian community, LGBTQI+ and disabled, living in two favelas in Rio de Janeiro. By shedding light on these lived experiences of cooling poverty, we contribute to the understanding of targeted interventions and policy measures that can alleviate the impacts of extreme heat and safeguard public health and well-being as temperatures rise.

One Health approach to Coxiella burnetii in Brazilian indigenous communities

Indigenous health has posted complex challenges worldwide, particularly due to historical economic, territorial, social and environmental processes, which may lead to emergence and reemergence of pathogens. In addition to few Coxiella burnetii serosurveys in vulnerable populations, especially in developing tropical countries, no comprehensive One Health approach has focused on human-animal infection along with potential environmental determinants. Accordingly, this study aimed to assess the seroprevalence of anti-C. burnetii antibodies in indigenous populations and their dogs from 10 indigenous communities distributed in southern and southeastern Brazil, along with the correspondent healthcare professionals. In overall, 8/893 (0.90%; 95% CI 0.45–1.76) indigenous and 1/406 (0.25%) dog samples were seropositive, with 7/343 (2.04%) individuals the 1/144 (0.69%) dog from the Ocoy community, located in the city of São Miguel do Iguaçu, bordering Argentina at south, and far 10 km at west from Paraguay. All 84 healthcare professionals tested seronegative.

The Perspective of Brazilian Women Orthopaedic Surgeons on Gender Discrimination: Initial Insights to Understand Gender Bias in the Brazilian Healthcare System.

Despite the societal progress made in recent years, gender discrimination is still common in healthcare, especially in some surgical specialties such as orthopaedics. In Brazil, where the participation of women in the medical profession has been increasing, little is known about women's perceptions on the issue of gender discrimination. This study aims to examine women orthopaedic surgeons' experiences in dealing with conflict in the workplace and contextualize the impact that gender discrimination has had or currently has on their careers and well-being. As a secondary objective, the work seeks to understand whether there are differences in the perception of the issue among practicing women orthopaedic surgeons and those in training. For a cross-sectional qualitative study, a survey was distributed exclusively to 300 practicing orthopaedic surgeons and orthopaedists in training (residents and fellows). A total of 99 women participated in the survey, of whom 66 were practicing orthopaedic surgeons and 33 were orthopaedists in training. The study showed that women orthopaedic surgeons in training in Brazil have a lower number of publications and a moderate level of involvement in academic society activity. In addition, orthopaedic surgeons in training experience a statistically significantly higher number of conflicts in the workplace. The comments from the questionnaires highlighted the physical and psychological consequences arising from these situations of professional conflict, most frequently occurring with orthopaedic surgeons who are men. Our findings indicate that respondents expressed a feeling of inequality towards women in the workplace, ultimately reducing the level of job satisfaction among female orthopaedic surgeons, which may contribute to disinterest and abandonment of the specialty. The results of this work support recent evidence that there is an implicit and often overlooked bias against the participation of women and ethnic minorities in the orthopaedic community in Brazil.

Odonatofauna en una zona del Cerrado brasileño, con el redescubrimiento de dos especies

The Cerrado harbors rich biodiversity and yet faces various anthropogenic pressures, an alarming situation that justifies fauna inventory studies, particularly insects, often overlooked in such endeavors. Additionally, many locations within the Cerrado lack information about the odonatofauna, including Conservation Units (CUs), considered the main tools for biodiversity conservation in Brazil. The objective of our study is to report the Odonata community occurring in the Minas Gerais portion of the Parque Nacional Grande Sertão Veredas (PNGSV), the conservation status of species, taxonomic information for some taxa, and compare the Odonata community along wet and dry seasons. The study was conducted from September 2022 to April 2023, with a total of 576 hours of sampling. We collected 601 specimens from 83 species, highlighting two new species (one recently described and other to be described elsewhere), eight new records for the state, and the rediscovery of the species Progomphus geijskesi Needham, 1944, collected for the first time in Brazil since 1918, and Argia botacudo Calvert, 1909, previously known only from the type material. The significant richness sampled, new taxa, new records, and the presence of species at some risk of extinction reinforce the Cerrado’s relevance as a global hotspot. It also underscores the importance of CUs as a tool to ensure the protection of Odonata communities in Brazil and highlights the need to strengthen public policies to guarantee investments and foster future financial resources for the protection of Brazilian biota, especially for conducting more inventory studies in the Cerrado.

In Defense of a Peripheral Epistemology: Exploring “Decolonial Cognitive Triggers” for Epistemic Disobedience in Urban Peripheries

This paper presents an approach to decolonial thinking and epistemological disobedience through what we call “decolonial cognitive triggers”. It is based on the struggles of urban peripheral communities in Brazil and explores eight triggers in the making of a Peripheral Epistemology. The unique points of our reflection are the sociocultural practices emerging from urban peripheral communities in Brazil and their responses to structural racism. As a part of this, we will explore the concepts of potência and convivência as core components of the decolonial debate, as well as their role in enabling epistemic disobedience in urban peripheries. We conclude by suggesting shifts in policy-making directed towards urban peripheries through the recognition and incorporation of such concepts and triggers.

Effects of Seasonal Variation on Nitrogen Use in Brazilian Cerrado Grass Communities

In savanna ecosystems, the seasonal effects of nitrogen forms and availability, as well as their utilization by plants, influence the abundance and distribution of herbaceous species in grassland communities. This study examines seasonal effects on nitrogen availability and utilization by native grass species in the Cerrado, a savanna ecosystem in Brazil. Ammonium and nitrate levels in soil, nitrate acquisition and transport, and Nitrate Reductase Activity (NRA) in different plant parts during dry and wet periods were assessed. Results indicated higher soil nitrate availability during the wet period, influenced by precipitation, with leaves showing a higher nitrate content compared to roots. There was seasonal modulation in nitrate reduction, with leaves being the primary site during the dry period and roots during the wet period. The studied grass species exhibited heterogeneous responses to seasonal nitrogen availability, potentially affecting community abundance patterns. Findings suggest that edaphoclimatic seasonality plays a crucial role in nitrogen distribution and utilization capacity by grass plants in the Cerrado, contributing to the understanding of these ecosystems’ ecology.

Editorial

In terms of energy production and consumption, the modern world's needs have become more and more challenging. Electrical energy is required to power most of all current “gadgets”, as well as, large industrial equipment, and more recently, our cars, which are expected to become all-electric in the not so far future. Once electrical energy (actually any kind of energy) can not be created or destroyed, it must be converted from other forms of energy.Our economy is still dependent on fossil energy sources like coal, petroleum and gas, which may be directly used to heat our homes and keep our cars running, but also to be converted into electrical energy. The drop-back of these resources is that they are highly pollutant and a worldwide movement is trying to reduce its use. Many bio alternatives have been proposed to replace these energy sources with a certain level of success. They are renewable and may help to reduce the greenhouse gas emission problem, however, alone, they will not solve the problem. In Brazil, most of the electrical energy comes from hydroelectric plants which are clean, renewable and reliable sources, however produces some undesired environmental impacts, most of them during the power plant construction. There is also a limited amount of this kind of energy that can be exploited. In parallel, we have the clean and renewable wind and solar sources. Both extraction technologies have already reached a higher maturity level and their use has been increasing in recent years. There is a great potential for large generation plants and also for small units to be installed in domestic homes or small consumption centers. For sure, there are other energy sources that could be included in the discussion.Any emerging country, like Brazil, needs to increase its infrastructure and reach a higher level of technological development. Among many factors, energy is one of the most important ones. A key issue with the energy production is its cost, and to reduce production costs, technological advances are needed. A promising emerging country can not rely only on foreign knowledge (technology) to build its infrastructure. Moreover, sustainable development can only be achieved when technological advances are promoted by its universities and research groups in a close collaboration with the industrial sector. For every energy type above discussed, even those with a higher level of development, there is still room for new discoveries, new applications and improvements, which must be relentlessly pursued by the Brazilian scientific community. We must have a commitment to the country's future.

Stakeholder engagement for inclusive water governance in a rural community in Brazil

Stakeholder engagement for inclusive water governance in a rural community in Brazil

Tech hub entrepreneurial training to low-income communities: Evidence from Brazil

Global development agencies have funded entrepreneurial projects to alleviate poverty in developing countries. This study discusses an international-sponsored training project delivered by a tech hub to stimulate creative economy entrepreneurship in low-income communities in Brazil. Studies focusing on providing entrepreneurial resources to create value for poor communities have diverging results. There is no clear understanding of resource use and transformation processes to generate entrepreneurial value for poor people. We have used the resourcing perspective from the social practice theory to analyze how project actions transform potential resources into resources used by community participants. Analyzing project entrepreneurship steps through resource-schema-action cycles and resourcing mechanisms allows an understanding of how participants use and transform resources to create valuable outcomes. Also, the technology-oriented hub approach constrains resourcing cycles and community enterprise options over time. As a result, a project developed in hub spaces could risk favoring community groups with better technological backgrounds and more visibility in that environment, limiting the breadth of its social change. Understanding the resourcing elements would help managers get more value from entrepreneurial resources when developing low-income enterprises. An empirical framework and related propositions summarize the paper's contributions.

Modeling the decay of free residual chlorine in water distribution networks in Brazilian rural communities using artificial neural network

Disinfecting water with chlorine is crucial for maintaining sanitation and preventing waterborne diseases. However, managing Free Residual Chlorine (FRC) concentrations becomes challenging in water supply systems, as its levels can decrease throughout the distribution network, impacting water quality and public health. By leveraging water quality data from the Water Quality Surveillance Information System for Human Consumption (Sisagua) and employing the variable selection method t-Distributed Stochastic Neighbor Embedding, we crafted a Multilayer Perceptron (MLP) neural network. This MLP, fine-tuned with weighted mean square error (WMSE), was designed to evaluate the decline of free residual chlorine in water distribution networks within rural Brazilian communities. Training the model with the weighted mean squared error (WMSE) increased the average hit rate from 3.6 % to 5.0 %. In contrast to the traditional colorimetric method for predicting free residual chlorine, the proposed methodology showed superior performance, with accuracy rates of 85.45 %, 95.58 % and 99.84 % for equipment accuracies of 0.5 mg. /L, 1.0 mg/L and 2.0 mg/L, respectively. The MLP approach not only anticipates nonconformities related to FRC but also aids in adjusting chlorine dosage proactively.

Culturally adapted cognitive assessment tool for Indigenous communities in Brazil: Content, construct, and criterion validity.

Initial dementia prevalence estimates have revealed a significant burden of the disease in Indigenous communities in Amazonas, Brazil. However, the need for culturally adapted cognitive tools poses a critical challenge when assessing cognitive performance in these communities. This study addressed this issue by culturally adapting and providing validity indicators for the Brazilian Indigenous Cognitive Assessment (BRICA) tool in Manaus, Brazil's urban multiethnic Indigenous community. Using a three-stage process and a stakeholder-engaged approach, the BRICA tool was culturally adapted in an urban multiethnic Indigenous community from Manaus, Brazil. The content validity index (CVI) examined inter-rater concordance between experts, while criterion and concurrent validity were performed using diagnostic consensus criteria in 141 Indigenous participants aged ≥ 50 years. Findings showed evidence of content validity in terms of equivalence aspects (scale CVI [S-CVI] 0.93) and relevance ratings (S-CVI 0.85) between expert panels. The identified cut-off score of ≤ 33/39 on the BRICA demonstrated a sensitivity of 94.4%, specificity of 99.2%, positive predictive value of 94.4%, and negative predictive value of 99.2% for dementia diagnosis. Using a stakeholder-engaged approach, we culturally adapted the BRICA tool for a Brazilian urban multiethnic Indigenous community. This comprehensive adaptation process resulted in favorable indicators of content, construct, and criteria validity for the BRICA tool. By addressing the existing bias in cognitive assessment within Indigenous communities, the BRICA tool represents a noteworthy breakthrough. Its implementation exhibits potential for improving the early detection and management of dementia among Indigenous groups. Culturally sensitive tools are essential to assess cognition in Indigenous populations.An expert panel and stakeholders' perspectives were incorporated to design the Brazilian Indigenous Cognitive Assessment (BRICA) tool.A cognitive screening tool was adapted and validated using a stakeholder approach.BRICA is the first culturally sensitive cognitive tool for urban Brazilian Indigenous individuals.

Exploring the clinical relevance of "Angico Gum": an effective biopolymer for topical protection of oesophageal mucosa in gastroesophageal reflux disease patients.

Angico gum (AG) (Anadenanthera colubrina var. Cebil [Griseb.] Altschul) is utilized by some Brazilian communities to alleviate symptoms from gastroesophageal reflux disease. Here, we aimed to investigate the "in vitro" topical protective capacity of AG on human esophageal mucosa. Biopsies of the distal esophageal mucosa were collected from 35 patients with heartburn (24 non-erosive and 11 with erosive oesophagitis (EE)) and mounted in Üssing chambers. AG was applied topically, followed by exposure with acid solution (pH 2.0 or pH 1.0), where transepithelial electrical resistance (TER) and The transepithelial permeability for fluorescein was assessed. The incubation of the AG labeled with FITC in the esophageal mucosa was localized by fluorescence microscopy. Pretreatment with AG prevented the drop in TER induced by acid solution, as well as significantly decreases the fluorescein permeability in non-erosive patients. The protective effect of AG was sustained for up to 120 min both in biopsies of non-erosive and erosive esophagitis. Confocal microscope images showed mucosal luminal adherence of FITC-labeled AG. AG had a prolonged topical protective effect against acid solution in mucosal biopsies of patients with non-erosive and erosive esophagitis.

Nature-based solutions in urban periphery communities in Brazil

This research aims to produce reflections on the potential of the concept of Nature-based Solutions - NbS to guide actions on income generation, improving human well-being and preserving nature in urban communities and favelas in Brazil. The data demonstrate that there are actions taken that are inspired by the environment in areas of concentrated poverty that can be understood as NbS. This discussion assumes scientific and social relevance, considering that urban communities and favelas in Brazil bring together a large population. This population lives in social and environmental vulnerability and seeks better living conditions. Actions preserving the environment in areas of concentrated poverty, understood as Nature-based Solutions (NbS), are an available strategy for improving human well-being. With the hypothesis that there are successful cases involving health and well-being, income generation from scenic beauty and nature-based teaching solutions in urban peripheries, but that there are processes that make them socially invisible, we investigated the application of NbS in urban communities (favelas) in Brazil and found several efforts demonstrating the viability of NbS to reduce social and environmental vulnerabilities and improve living conditions.

The Brazilian diaspora: Intra‐community dynamics and differentiating factors among Brazilian migrants worldwide

AbstractWhile the Brazilian diaspora scholarship is a vibrant literature that emerged in the 1980s and has gained prominence over the years, it remains geographically dispersed. Most studies focus on Brazilian migrants' experiences in a specific country or region of destination, and less attention has been paid to issues that influence the Brazilian diaspora transnationally. While the experiences of Brazilian migrants in different regions are varied and dependent on exogenous factors in the host society, this article reviews and discusses common markers of identity and positioning that shape intra‐community social dynamics between Brazilians who reside in different regions of the world. These ‘endogenous differentiating factors’ often produce tensions and intra‐community stratification, and may be carried from Brazil to the host community or produced in the host society. This article aims to integrate the geographically dispersed literature and emphasise commonalities experienced by Brazilians worldwide. It also argues that the focus on endogenous differentiating factors relates to a scholarly trend to frame the ‘Brazilian community’ as a heterogeneous entity with its own social dynamics rather than a homogenous ethnic group.

How to measure Entrepreneurial Ecosystems? Current debate and challenges for the Brazilian case

Objective: The paper reviews and systematizes the metrics proposed in the literature for measuring the different elements of entrepreneurship ecosystems and discuss the challenges of measuring ecosystems at the regional level and in the Brazilian case. Method: Bibliographic review of the metrics proposed for Entrepreneurship Ecosystems and descriptive statistics to systematize the indicators found in the literature. Results: There is still no uniformity in the proposal of metrics. Most of them have a national approach and are related to the dimensions of public policy and regulation, culture, and resources. The effort to apply theory to the Brazilian case is still incipient, and it is necessary to construct adequate metrics for the national reality. Theoretical/methodological contributions: The article contributes to the debate on the measurement of entrepreneurship ecosystems by showing the diversity of proposed methodologies and indicators, existing gaps, the need to think about indicators for the subnational level, and the implications for the Brazilian case. Relevance/Originality: Despite its potential as a tool for public policies, the concept of EE and its measurement methods are still underexplored by the Brazilian academic community. The article aims to fill this gap and demonstrate that this line of academic research is promising.

Branched hierarchization of indicators related to rural housing for environmental health evaluation

The Brazilian rural communities concentrate a significant fraction of the population exposed to deficient conditions in water supply, sanitary sewage, and solid waste management, which, combined with housing conditions, directly impact the quality of a healthy environment. Few studies have evaluated the salubrious conditions of a rural environment, and in the searches carried out, the use of branched hierarchical techniques was not verified. The objective of this work was to create a branched hierarchization of those variables that are the cause of unhealthy conditions of the housing environment. Initially, all the variables that affect the salubrity of the housing environment were listed, to later order them in a ramified form. Afterwards, and based on the technical literature, the parameters of adequacy and/or inadequacy of these variables were defined. This methodology was tested in a rural dwelling in order to exemplify its applicability. The application of the proposed tool has demonstrated a satisfactory practical use, with low time spent for its conclusion, besides providing a realistic characterization of the environment evaluated. This work provides an easily applicable methodology for obtaining a detailed report on the degree of adequacy of a wide range of variables that influence the healthiness of rural dwellings.