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Headache is the most common neurological symptom in COVID-19, reported in 6.5 to 34% of patients. Few studies have analyzed its characteristics, and some of them included cases without laboratory confirmation or reported only critical patients. We aimed to analyze the clinical characteristics of COVID-19 associated headache in laboratory-confirmed cases. We conducted a retrospective evaluation of patients with COVID-19 and neurological symptoms. Patients who reported headache answered an interview about its clinical characteristics. Twenty-four patients with COVID-19 associated headache completed the interview. Mean age of patients was 53.8 (standard deviation—17.44), and 14 out of 24 (58.3%) were male. The majority (75%) had no previous history of headache. Fever was documented in 19 out of the 24 patients (79.1%). Headache was predominantly bifrontal or holocranial, in pressure, during hours, worsening with cough or physical activity. COVID-19 headache tends to appear in the first days of symptoms, be either frontal or holocranial and last for days. The quality of pain in pressure and the worsening with cough or physical activity were reported in most cases. We have not found any characteristic that could differentiate COVID-19 associated headache from other causes of headache, possibly because of its multifactorial mechanism.

Seventy specimens of Hypsiboas albopunctatus (Anura: Hylidae) were collected and surveyed for endoparasites in Brasília, Brazil at the end of the rainy season (February and March) in 2005. Sixteen males (22.86%) were infected by Rhabdias sp., Aplectana sp., Cosmocerca sp., and Falcaustra mascula. Rhabdias sp., a lung parasite, presented the highest prevalence (8.57%), mean intensity of infestation (1.333), and mean abundance (0.114). Moreover, this is the first report of a rhabdiasid nematode in the Hylidae in Brazil. The intestinal parasites, Cosmocerca sp. and Aplectana sp., had a similar prevalence (5.71%), but the former presented a higher mean intensity of infestation and mean abundance. The behavior and food habits of amphibians are responsible for the differences in their helminthofauna, and this study presents four new records of nematodes in H. albopunctatus.

Os volumes molares ou densidades de seis álcoois puros pertencentes à indústria de biocombustíveis foram estimados para diferentes valores de temperaturas dentro da faixa entre 280 K e 333 K, utilizando um modelo desenvolvido a partir da equação de equilíbrio líquido-vapor ou Equação de Clausius- Clapeyron. O segundo coeficiente virial (B) foi calculado a partir de dados preditivos aplicados ao modelo. Como  amplamente conhecido, variações no valor de B refletiriam nos volumes molares dos compostos com resultado semelhante. Neste trabalho, observou-se que os desvios foram positivos para todas as espécies estudadas e aumentaram entre os álcoois de longa cadeia de carbono. Quando disponível, foi feita uma comparação entre o volume molar experimental e o predito.

Este trabalho busca apresentar alguns experimentos realizados em laboratório para obtenção de um composto tóxico, o ciclohexeno, a partir da desidratação do ciclohexanol. Os experimentos foram conduzidos com o uso constante de máscara para gases e luvas devido à toxidez e periculosidade dos reagentes e produtos envolvidos. Resultados foram comparados com a literatura mostrando que o procedimento usado pode ser empregado para o ensino de alunos de cursos de Química e Engenharia Química.

This report focuses on a fatality involving severe dengue fever and melioidosis in a 28-year-old truck driver residing in Pacoti in northeastern Brazil. He exhibited long-term respiratory symptoms (48 days) and went through a wide-ranging clinical investigation at three hospitals, after initial clinical diagnoses of pneumonia, visceral leishmaniasis, tuberculosis, and fungal sepsis. After death, Burkholderia pseudomallei was isolated in a culture of ascitic fluid. Dengue virus type 1 was detected by polymerase chain reaction in cerebrospinal fluid (CSF); this infection was the cause of death. This description reinforces the need to consider melioidosis among the reported differential diagnoses of community-acquired infections where both melioidosis and dengue fever are endemic. Estudo de caso fatal de coinfecção de melioidose e dengue grave em um motorista de 28 anos, residente no município de Pacoti, nordeste do Brasil. O paciente apresentou inicialmente sintomas respiratórios com evolução por 48 dias. Foi internado em três diferentes unidades de saúde com suspeitas de pneumonia, leishmaniose visceral, tuberculose e sepse fúngica. Após o óbito, a cultura de líquido ascítico identificou a bactéria Burkholderia pseudomallei. O vírus da dengue tipo 1 foi detectado por PCR no líquor do paciente. Esta descrição reforça a necessidade de considerar a melioidose entre os diagnósticos diferenciais de infecções comunitárias onde as duas doenças são endêmicas.

O presente trabalho propõe o tratamento de água cinza para reutilização ou em condições favoráveis ao descarte para o meio ambiente. Foram realizados testes com uma água residual composta por água de torneira, sabão em pó e óleo de cozinha. Medidas de pH, condutividade elétrica, temperatura, sólidos totais e oxigênio dissolvido foram realizados. Os experimentos fora para remover os sólidos suspensos, foi utilizado um tratamento de floculação com as soluções de Sulfato de Alumínio a 1% e 2%, Sulfato Ferroso 2% e Tripolifosfato de Alumínio a 2% seguindo o processo físico de decantação. De acordo com os resultados observou-se que o uso de Sulfato de Alumínio 1 e 2% proporcionou resultados animadores, reduzindo a concentração de sólidos dissolvidos e provocando poucas alterações nos parâmetros de pH, oxigênio dissolvido que se aproximaram da água de torneira.

O presente trabalho propõe o tratamento de água cinza para reutilização ou em condições favoráveis ao descarte para o meio ambiente. Foram realizados testes com uma água residual composta por água de torneira, sabão em pó e óleo de cozinha. Medidas de pH, condutividade elétrica, temperatura, sólidos totais e oxigênio dissolvido foram realizados. Os experimentos fora para remover os sólidos suspensos, foi utilizado um tratamento de floculação com as soluções de Sulfato de Alumínio a 1% e 2%, Sulfato Ferroso 2% e Tripolifosfato de Alumínio a 2% seguindo o processo físico de decantação. De acordo com os resultados observou-se que o uso de Sulfato de Alumínio 1 e 2% proporcionou resultados animadores, reduzindo a concentração de sólidos dissolvidos e provocando poucas alterações nos parâmetros de pH, oxigênio dissolvido que se aproximaram da água de torneira.

Pre-exposure prophylaxis (PrEP) is an effective HIV prevention strategy that consists in the use of antiretroviral drugs by seronegative people at risk of HIV. Negative perceptions, inadequate understanding, and access barriers have been associated with decreased medication adherence. Manaus is the largest city in the Brazilian Amazon, where the incidence of HIV/AIDS is high, and the rates of adherence to the antiretroviral treatment for HIV and PrEP are low. In this qualitative study among PrEP users, mostly MSM, we explored perceptions, knowledge, and access barriers. We conducted 21 in-depth interviews with an intentionally sampled group of participants who had used PrEP at least once in their lifetime, selected through the snowball technique, between April and July 2022. A thematic analysis was conducted with a predominantly inductive approach. We highlight three relevant themes: (i) access to information about PrEP and its influences on users, (ii) access, monitoring, and barriers encountered, and (iii) facilitators for PrEP adherence and sexual behaviors. One of the negative perceptions identified in the study involves a misunderstanding of the association between PrEP users and the HIV/AIDS status. Participants revealed that some non-PrEP users suspect that individuals claiming PrEP usage are concealing an HIV-positive status to engage in unprotected sex. Lack of information by health professionals regarding HIV prevention methods poses significant barriers to PrEP access and adherence. Participants emphasized social media’s crucial role in PrEP awareness. The results suggest a need to increase digital outreach regarding PrEP, decentralize PrEP services, and provide comprehensive healthcare training to improve the effectiveness of the preventive measure.

Guatteria olivacea R. E. Fries (synonym Guatteria punctata (Aubl.) R.A. Howard) is a tree of 10–27 m tall popularly known as “envira-bobó”, “envira-fofa”, “envireira”, “embira”, “embira-branca”, “embira-preta”, envira-branca”, and “envira-preta”, which can be found in the Brazilian Amazon biome. In this study, we evaluated the cytotoxic and antitumor effects of the essential oil (EO) obtained from the leaves of G. olivacea against liver cancer using HepG2 cells as a model. EO was obtained using a hydrodistillation Clevenger-type apparatus and was qualitatively and quantitatively characterized using GC–MS and GC–FID, respectively. The alamar blue assay was used to assess the cytotoxic potential of EO in a panel of human cancer cell lines and human non-cancerous cells. In HepG2 cells treated with EO, YO-PRO-1/propidium iodide staining, cell cycle distribution, and reactive oxygen species (ROS) were examined. In C.B-17 SCID mice with HepG2 cell xenografts, the efficacy of the EO (20 and 40 mg/kg) was tested in vivo. GC–MS and GC–FID analyses showed germacrene D (17.65%), 1-epi-cubenol (13.21%), caryophyllene oxide (12.03%), spathulenol (11.26%), (E)-caryophyllene (7.26%), bicyclogermacrene (5.87%), and δ-elemene (4.95%) as the major constituents of G. olivacea leaf EO. In vitro cytotoxicity of EO was observed, including anti-liver cancer action with an IC50 value of 30.82 μg/mL for HepG2 cells. In HepG2 cells, EO treatment increased apoptotic cells and DNA fragmentation, without changes in ROS levels. Furthermore, the EO inhibited tumor mass in vivo by 32.8–57.9%. These findings suggest that G. olivacea leaf EO has anti-liver cancer potential.

This article updates the previous text of the main author published in 2000, revisiting the scientific evidence that reaffirms the contribution of health to the quality of life of individuals and populations. More than the access to health services of any quality, it is necessary to face determinants of health in its entirety, which requires healthy public policies, an effective intersectoral articulation of public power and mobilization of the population. The authors revisit the emergence and development of health promotion, focusing on the analysis of the most promising health strategies for the increase in quality of life, especially in societies with high social and health inequalities, as in the case of Brazil, reinforced by the recent pandemic of COVID-19. Such strategies were concretized on healthy municipalities and intersectoral actions, in health and in all policies which confront social determinants, through their own foundations and practices that are closely related to innovations in public management for integrated and sustainable local development, in view of the 2030 Agenda and its Sustainable Development Objectives (SDG).