Water quality of the reservoirs used for irrigation in São José dos Pinhais, Paraná State, Brazil

Jarek, Tiago Miguel; Souza, Jorge Luiz Moretti de; Favaretto, Nerilde; Ruaro, Lucimeris

doi:10.1590/0103-8478cr20150420

Cited by 2 publications

(4 citation statements)

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“…It was found that all ponds do not have adequate riparian forest. Such deficiency benefits the entry of organic matter into the water body, as a consequence of an erosive process that contributes to water contamination (Jarek et al, 2016). It is important to note that in warmer months, there is an increase in fauna activity representing an increase in the impact on the microbiological quality of waters, expressly in remote areas, with little anthropogenic interference, such as P1, P2 and P4 (Morais, Tauk-Tornisielo, & Ventorini, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…As a consequence, there is an increase of edaphic material to water sources in the proximity, carrying organic and inorganic matter and chemical compounds responsible for surface water contamination due to erosive processes as well as pollutant leaching due to unsustainable management (Steffen, Steffen, & Antoniolli, 2011). It is noteworthy that water contamination is aggravated by the destruction of riparian vegetation (Jarek, Souza, Favaretto, & Ruaro, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Microbiological water quality monitoring of four ponds from Lagoa do Sino Farm located in São Paulo State, Brazil

Evangelista

Souza

Ferreira

et al. 2021

Acta Sci. Biol. Sci.

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This study aimed to evaluate the microbiological quality of the water of four ponds used for irrigation on the Lagoa do Sino Farm, as well as to perform the genotypic characterization of virulence factors in Escherichia coli isolates. Sampling was conducted for 11 months, between 2015 and 2016. Samples were analyzed for the presence of thermotolerant coliforms, E. coli and heterotrophs. DNA was extracted from E. coli isolates, followed by genotypic characterization by polymerase chain reaction. Agricultural activities and pesticides used in the sampling period were documented in order to assess possible relationships between agricultural activities and microbiological water quality. The absence of suitable riparian vegetation around all the ponds was observed, benefiting the entry of organic matter and contaminants in the water body. A high index of thermotolerant coliforms in some months indicated the possibility of the transmission of pathogenic microorganisms in these ponds. The values found in some months were above the regulatory limits for water potability and water intended for irrigation. The agrochemicals used in the period seem to influence the results obtained. All 17 E. coli isolates showed at least one of the virulence genes estA, stx1, stx2, and aatA, indicating enterotoxigenic, enterohaemorrhagic or enteroaggregative nature. The presence of E. coli in the waters may be associated with the presence of animals. The water samples analyzed are not suitable for irrigation of vegetables that are consumed raw and/or low lying fruits ingested without skin removal. It is essential to broaden the control of the use of chemicals, as well as the preservation of riparian vegetation to improve the quality of water used in the farm's agricultural activities.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbiological water quality monitoring of four ponds from Lagoa do Sino Farm located in São Paulo State, Brazil

Evangelista

Souza

Ferreira

et al. 2021

Acta Sci. Biol. Sci.

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“…As sub-bacias de cada um dos pontos de coleta estão separadas pelo mesmo divisor de águas, que foi escolhido para evitar a interferência de outros fatores e para propiciar o menor intervalo de tempo possível entre a coleta de um ponto e outro. Mais detalhes referentes à caracterização da sub-bacia quanto ao uso do solo e à qualidade da água podem ser encontrados em Jarek et al (2016). A coleta das amostras e as análises da água foram feitas mensalmente no período de um ano, com intervalo de 25 minutos entre os reservatórios (nascente preservada e reservatórios B e C), sempre no mesmo horário.…”

Section: Methodsunclassified

“…Dos 83 isolados obtidos ao longo do ano, mais da metade (45) foi obtida apenas nos meses de junho e julho, período em que ocorreram as maiores precipitações antes da coleta, 147 e 125 mm, respectivamente (figura 2). Verificou-se o mesmo efeito para outros grupos de bactérias, como, por exemplo, coliformes e bacterioplâncton (AMORIM & ARAÚJO, 2012;JAREK et al, 2016).…”

Section: Medidaunclassified

Isolamento e quantificação de Pectobacterium spp. em água de irrigação utilizando meio cristal violeta pectato

Santos

Souza

Jareck

et al. 2020

ABC

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Testou-se o meio cristal violeta pectato (CVP) para isolar e quantificar bactérias do gênero Pectobacterium na água de irrigação de hortaliças, em três locais de Colônia Murici, Paraná. Amostras de água foram coletadas ao longo de um ano, em dois reservatórios (“B” e “C”) e uma nascente. Preparou-se o meio CVP adaptado (pectina cítrica no lugar de pectina de sódio), que foi testado com isolado padrão de Pectobacterium carotovorum. As amostras foram inoculadas, com 15 repetições, e incubadas a 28ºC por 10 dias; posteriormente se realizaram a contagem das colônias e repicagem. A concentração (UFC ml−1) nas amostras foi calculada com a média obtida de 15 microgotas. Obtiveram-se 83 isolados de bactérias pectolíticas, e 21 foram testados quanto à patogenicidade em frutos de pimentão; nenhum apresentou sintoma de podridão mole. O fator de maior influência na quantidade de bactérias foi a precipitação acumulada sete dias antes da coleta, sendo o reservatório “B” o que evidenciou maior correlação. O meio CVP adaptado permitiu isolar e quantificar Pectobacterium spp. em água de irrigação de hortaliças, ao nível de detecção de 5.10−1. As amostras e o período analisados apresentaram baixo risco de contaminação das hortaliças pela água de irrigação.

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Water quality of the reservoirs used for irrigation in São José dos Pinhais, Paraná State, Brazil

Abstract: Land use outside its agricultural potential and low vegetation cover in the watershed impair the quality of water used for irrigation and may contribute to the spread of pathogenic

Cited by 2 publications

References 6 publications

Microbiological water quality monitoring of four ponds from Lagoa do Sino Farm located in São Paulo State, Brazil

Microbiological water quality monitoring of four ponds from Lagoa do Sino Farm located in São Paulo State, Brazil

Isolamento e quantificação de Pectobacterium spp. em água de irrigação utilizando meio cristal violeta pectato

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