Contamination of semiarid potiguar reservoirs by harmful bacteria

Nascimento, Ermeton Duarte do; Maia, Claudio Marcio de Medeiros; Araújo, Magnólia Fernandes Florêncio de

doi:10.4136/ambi-agua.1801

Cited by 1 publication

(3 citation statements)

References 17 publications

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“…Despite oscillations between minimum and maximum values, the TP and DO concentrations remained within the average found frequently in the reservoir. Other researchers have made similar observations in this same environment (Sodré-Neto & Araújo, 2008;Costa, Cunha, Panosso, Araújo, Melo, & Sant'anna, 2009;Nascimento, Maia, & Araújo, 2016). Short numerical variations of measured environmental variables in the last 10 years may be related to the low climatic variability and to the prevalence of high and regular temperature throughout each year.…”

Section: Resultssupporting

confidence: 69%

“…Several studies on aquatic communities and the presence of opportunistic pathogens in Brazilian semiarid reservoirs are investigations that address the eutrophication and ecology of these ecosystems. Their emphasis are usually upon interactions between communities and environmental variables, using quantification and identification techniques based on cultivable organisms (Bouvy, Falcão, Marinho, Pagano, & Moura, 2000;Costa et al, 2009;Moura, Dantas, Oliveira, & Bittencourt-Oliveira, 2011;Nascimento et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Recently, Nascimento et al (2016) also emphasized the predominance of enterobacteria and E. coli from sewage and wastewater. In addition to this problem, Nascimento and Araujo (2014) highlighted a possible presence of pathogens and multi-resistant bacterial strains in their systematic review.…”

Section: Resultsmentioning

confidence: 99%

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Insights into multiple use water enterobacteria from the Brazilian semi-arid: the first approach by pyrosequencing

Neto

Regali-Seleghim

Araújo

et al. 2019

Acta Sci. Biol. Sci.

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Thousands of people living in semi-arid regions face problems of drought and loss of water quality. In addition, high incidence of acute diarrheal diseases related to water consumption has been responsible for a high number of deaths and high economic costs for human health. Many of the diseases can be caused by the presence of enterobacteria in reservoirs that serve for multiple purposes. This study aimed to confirm the presence of potentially harmful bacteria, which was highlighted in other articles, and to reveal non-identified genera by culture-dependent methods and pyrosequencing. Twenty-three genera of the Enterobacteriaceae family were detected, with emphasis on Escherichia genus and confirmation of the presence of species such as Salmonella enterica and Enterobacter cloacae. The abundance of heterotrophic prokaryotes and the physical and chemical data show an expected average for this type of environment due to the numbers historically presented in previous articles. The unprecedented detection of the presence of some potentially pathogenic species can alert and raise awareness of the populations that use stored water in the semi-arid regions. Consequently, as a result of the peculiar characteristics of reservoirs under this climate influence, there is a cosmopolitanism of enterobacteria that may be related to the alarming numbers of infections from Waterborne Diseases.

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Section: Resultssupporting

confidence: 69%