Condições laborais e nível de estresse em silvicultores do eucalipto-ssp de um Munícipio no Leste da Bahia / Labor conditions and stress level in forests from eucalyptus-ssp of a Municipality in East Bahia

O estudo objetivou investigar a ocorrência de estresse nos trabalhadores da silvicultura do eucalipto que desenvolvem atividades no plantio, cultivo e manejo nos distritos de Alagoinhas-Ba. Para coleta e análise dos fatores foi utilizada a Escala de Vulnerabilidade e Estresse no Trabalho (EVENT) associado a um questionário socioeconômico. O teste e o questionário foram aplicados em 80 trabalhadores com faixa etária entre 20 a 60 anos, após receberem as informações do estudo e assinarem o Termo de Livre Consentimento Esclarecido (TCLE) com CAE n076423617100005028. A amostra de trabalhadores foi por conveniência de forma aleatória, onde todos foram orientados quanto às etapas do estudo realizado. O instrumento aplicado buscou identificar sintomatologias que os indivíduos apresentavam, avaliando e qualificando sinais e sintomas predominantes de estresse bem como se as variáveis socioeconômicas estavam influenciando. Os resultados da Escala EVENT apontou o fator 2 (pressão no ambiente de trabalho) como principal fator influenciador da geração do estresse laboral, com índice de incidência nos participantes de 42,9% (médio superior) e 32,1% (superior). Este último valor é um indicador de alta vulnerabilidade ao estresse. A avaliação do fator 3, Infraestrutura e rotina (tabela 4), teve um indicativo de 10,7%, o que sugere uma média tendência ao estresse. Assim é possível afirmar que a população estudada é vulnerável e suscetível ao estresse. A avaliação em conjunto dos fatores 1 2 e 3 revelou que o nível de estresse elevado nesses trabalhadores, aumenta o risco de acidentes de trabalho, dificulta as relações interpessoais, decrescimento da qualidade vida e consequentemente da produtividade laboral

Pathology of intracardiac nerves in experimental Chagas disease

Severe destruction of intrinsic cardiac nerves has been reported in experimental acute Chagas myocarditis, followed by extensive regeneration during the chronic phase of the infection. To further study this subject, the sympathetic and para-sympathetic intracardiac nerves of mice infected with a virulent Trypanosoma cruzi strain were analyzed, during acute and chronic infection, by means of histological, histochemical, morphometric and electron microscopic techniques. No evidences of destructive changes were apparent. Histochemical demonstration for acetylcholinesterase and catecholamines did not reveal differences in the amount and distribution of intracardiac nerves, in mice with acute and chronic Chagas myocarditis or in non-infected controls. Mild, probably reversible ultrastructural neural changes were occasionally present, especially during acute myocarditis. Intrinsic nerves appeared as the least involved cardiac structure during the course of experimental Chagas disease in mice

Pathology of intracardiac nerves in experimental Chagas disease

Severe destruction of intrinsic cardiac nerves has been reported in experimental acute Chagas myocarditis, followed by extensive regeneration during the chronic phase of the infection. To further study this subject, the sympathetic and para-sympathetic intracardiac nerves of mice infected with a virulent Trypanosoma cruzi strain were analyzed, during acute and chronic infection, by means of histological, histochemical, morphometric and electron microscopic techniques. No evidences of destructive changes were apparent. Histochemical demonstration for acetylcholinesterase and catecholamines did not reveal differences in the amount and distribution of intracardiac nerves, in mice with acute and chronic Chagas myocarditis or in non-infected controls. Mild, probably reversible ultrastructural neural changes were occasionally present, especially during acute myocarditis. Intrinsic nerves appeared as the least involved cardiac structure during the course of experimental Chagas disease in mice

Effects of emissions from sugar cane burning on the trachea and lungs of Wistar rats

ABSTRACT Objective: To evaluate the effects of exposure to emissions from sugar cane burning on inflammatory mechanisms in tissues of the trachea and lung parenchyma in Wistar rats after different periods of exposure. Methods: This was an experimental open randomized study. The animals were divided into four groups: a control group (CG) underwent standard laboratory conditions, and three experimental groups were exposed to emissions from sugar cane burning over different periods of time, in days-1 (EG1), 7 (EG7), and 21 (EG21). After euthanasia with 200 mg/kg of ketamine/xylazine, fragments of trachea and lung were collected and fixed in 10% formalin. Histological analyses were performed with H&E and picrosirius red staining. Results: No inflammatory infiltrates were found in the tissues of CG rats. The histological examination of tissues of the trachea and lung parenchyma revealed that the inflammatory process was significantly more intense in EG7 than in the CG (p < 0.05 and p < 0.01, respectively). In comparison with the CG and EG1, angiogenesis in the lung parenchyma and collagen deposition in tracheal tissues were significantly greater only in EG21 (p < 0.001 and p < 0.01, respectively). Conclusions: In this sample, emissions from sugar cane burning induced acute focal and diffuse inflammation in the lamina propria of tracheal tissues, with no loss of ciliated epithelial tissue. In the lung parenchyma of the animals in the experimental groups, there was interstitial and alveolar edema, together with polymorphonuclear cell infiltrates