Search

Diante da insuficiência dos serviços de saneamento básico no litoral de Salvador-BA, acredita-se que a incidência de chuvas tenha contribuído com a degradação da qualidade da água para fins de balneabilidade. Nesse sentido esta pesquisa tem como objetivo, investigar a influência da precipitação nas densidades de E.coli das praias localizadas no litoral de Salvador-BA. Para tanto foram utilizados os dados de monitoramento pluviométrico e da balneabilidade disponibilizados pelo Instituto do Meio Ambiente e Recursos Hídricos do Estado da Bahia (INEMA), referentes ao ano de 2017 e 2018. Para avaliar a dependência das variáveis, foi aplicado o Coeficiente de Correlação Linear de Pearson (r). Os resultados apontaram influência da precipitação nas densidades de E.coli de 17 praias. No ano de 2017 a maior correlação (r=0.58) foi obtida com o precipitado um dia antes da data da coleta na estação do Cabula com os níveis de E.coli da praia de Amaralina - AM 100. Com r = 0.67, no ano de 2018, as maiores correlações foram obtidas com o registrado na estação do Cabula dois dias antes da coleta com as densidades de E.coli das praias de Armação- AR 200 e Rio Vermelho - RV 100. De modo geral as correlações estiveram variando na faixa moderada. Foi possível concluir que embora exista influência da precipitação na dinâmica de E.coli, o aporte de bactérias está associado a múltiplos fatores decorrentes do ambiente.

This study was to evaluate the exposure to methylmercury (HgMe) and the potential health risk of Tupari Indians through the consumption of their main foods. Were collection of samples of plant foods and muscle tissue from different species of fish and wild animals consumed in three villages of the Rio Branco Indigenous Land in Rondonia, in the Brazilian Amazon. The HgMe was measured in an atomic fluorescence spectrophotometer with gas chromatography. The statistical treatment of the data was performed by software R. Of the six different plant species, only sweet potato (Ipomoea batatas) had mean concentrations of HgMe above the limit of detection of the analytical technique for the three villages. There was a significant difference in the levels of HgMe between the species of wild animals and fish belonging to the same alimentary habit. Carnivores presented higher levels of HgMe than those obtained for non-predators, both for fish and for wild animals. The results of the assessment of the potential risk to indigenous health indicated a total HgMe of the weekly ingestion rate (WIR) of between 8.4 and 15.0 μg / kg of body weight for the villages evaluated, extrapolating all reference doses ( RfD) regarding for the Provisional Tolerable Weekly Intake (PTWI). The risk quotients (RQ) varied from 5.3 to 21.4, considerably exceeding the limit (RQ ≤ 1), which allows to consider the impossibility of toxic effects of HgMe. The fishes accounted for the highest percentage of WIR of HgMe for all villages, with an emphasis on predatory species. Considering the nutritional value of fish meat, it is suggested the continuity of the consumption of this meat in the villages with preference for non-carnivores.

The influence of seasonality on chemical composition of cheese produced during different seasons, was verified as well as their microbiological quality. A total of 32 samples of colonial cheeses produced in the southwestern Paraná were analyzed. Although the study could be thoroughly not completed, the chemical results showed significant variations (p

The aim of this work was to evaluate the antibacterial activity of Brazilian plants extracts against fish pathogenic bacteria. Forty six methanolic extracts were screened to identify their antibacterial properties against Streptococcus agalactiae, Flavobacterium columnare and Aeromonas hydrophila. Thirty one extracts showed antibacterial activity. O objetivo deste trabalho foi avaliar a atividade antibacteriana de extratos de plantas brasileiras contra bactérias patogênicas para peixes. A atividade antibacteriana de quarenta e seis extratos metanólicos de plantas foi avaliada contra os agentes Streptococcus agalactiae, Flavobacterium columnare e Aeromonas hydrophila. Trinta e um extratos apresentaram atividade antibacteriana.