Effects of rainfalls variability and physical–chemical parameters on enteroviruses in sewage and lagoon in Yopougon, Côte d’Ivoire

Momou, K. J.; Akoua‐Koffi, Chantal; Traoré, Karim; Akré, Djako Sosthène; Dosso, Mireille

doi:10.1007/s13201-016-0388-1

Cited by 6 publications

(5 citation statements)

References 47 publications

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Section: Statistical Modellingsupporting

confidence: 93%

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

Islam

2022

Sustain. Water Resour. Manag.

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Faecal contamination of surface water sources is an important water quality issue worldwide. Although quite a few studies exist on surface water faecal contamination and variability of indicator bacteria, most of the studies have been based on larger river basins and in temperate region. The variability is relatively unknown in local scale and in tropical developing countries. In this study we assess how anthropogenic and environmental factors affect faecal contamination and physicochemical parameters in Rupsha and Bhairab rivers around Khulna city, Bangladesh. Water samples were collected from six locations of the rivers during a wet and dry period in 2018 to measure Escherichia coli (E. coli) concentrations. Water physicochemical parameters-temperature, turbidity, pH, dissolved oxygen, biochemical oxygen demand and chemical oxygen demand were also measured. Higher concentrations of E. coli were found in the sampling sites located near the densely populated urban area compared to the downstream site, which receives fewer amounts of discharges from sewer drains. All the E. coli samples violated bathing water quality standards. E. coli concentrations were found to be correlated positively with precipitation and turbidity. A linear regression model was applied, that explains large part of the variation in E. coli concentration (R 2 = 0.42). Water quality index assessment was also ranked the water quality as 'poor' category; indicate that the water is unsuitable for uses in domestic and recreational purposes and high health risks involved with the water use. The study ndings highlight the problem of untreated sewage discharge into the rivers. Implementation of sewage treatment plant with adequate capacity is highly recommended.

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Section: Statistical Modellingsupporting

confidence: 93%

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

Islam

2022

Sustain. Water Resour. Manag.

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“…Furthermore, as reported by Momou et al (2017) at the Yopougon Bay site, nutrients and suspended matter were significantly correlated with enterovirus loads. It is likely that elevated nutrient concentrations (leading to eutrophication) indirectly enhance viral persistence by promoting microbial biofilm formation and the flocculation of organic material and mineral particles, which in turn promotes virus adsorption to flocculated material and its accumulation in the sediment and water column (Malham et al, 2014).…”

Section: Discussionsupporting

confidence: 79%

“…To date, only the presence of enteroviruses has been sporadically assessed in the sewage that flows into the lagoon and in the lagoon itself, despite the prevalence of waterborne viruses in this environment (Kouassi et al, 2012; Momou et al, 2012; Momou et al, 2017). These surveys, using standard PCR techniques, have reported only viral concentrations and have not been able to identify the viruses taxonomic and functional properties, or the presence of other pathogens in the lagoon.…”

Section: Introductionmentioning

confidence: 99%

Decoding the DNA and RNA viromes of a tropical urban lagoon

Andrianjakarivony

Bettarel

Cecchi

et al. 2023

Environmental Microbiology

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Human and livestock sewage is one of the major causes of excess nutrients, leading to the eutrophication of aquatic ecosystems and potentially to the emergence or spread of pathogenic viruses. This study aimed to investigate the composition and diversity of aquatic viromes in a highly anthropized lagoon, to identify the presence of pathogenic taxa and to explore their use as possible viral indicators of faecal contamination. For this, water and sediment samples were collected in the Ebrié Lagoon (Ivory Coast) at seven stations with contrasting levels of eutrophication. The DNA viromes of the planktonic and the benthic compartments were highly divergent, but were not influenced by the level of eutrophication. Conversely, the RNA viromes in the water column were comparable to those found in sediment, but showed significant differences between the stations. We detected the presence of viral DNA and RNA sequences we had assigned as indicators of faecal contamination (smacovirus, pecovirus and pepper mild mottle virus) as well as human pathogens (human cyclovirus, coxsackie B virus and picobirnavirus), which were all enriched in the most eutrophicated sites. These findings suggest that the examination of viromes represents a promising tool for assessing the state of human‐induced contamination of aquatic ecosystems.

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“…A signi cant positive correlation was found between COD and rainfall data, which shows the effects of rainfall on increasing the pollution load in the rivers. This is also in agreement with the study ofMomou et al (2017).The weak correlation of E. coli concentration with pH, DO and BOD could be due to the relatively small spatiotemporal variation of these parameters, which allowed other parameters to have a stronger in uence on E. coli concentrations. Weak in uence of these parameters was also reported in other studies (e.g.Stocker et al 2016; Momou et al 2017).…”

supporting

confidence: 91%

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

Islam

2021

Preprint

View full text Add to dashboard Cite

Faecal contamination of surface water sources is an important water quality issue worldwide. Although quite a few studies exist on surface water faecal contamination and variability of indicator bacteria, most of the studies have been based on larger river basins and in temperate region. The variability is relatively unknown in local scale and in tropical developing countries. In this study we assess how anthropogenic and environmental factors affect faecal contamination and physicochemical parameters in Rupsha and Bhairab rivers around Khulna city, Bangladesh. Water samples were collected from six locations of the rivers during a wet and dry period in 2018 to measure Escherichia coli (E. coli) concentrations. Water physicochemical parameters—temperature, turbidity, pH, dissolved oxygen, biochemical oxygen demand and chemical oxygen demand were also measured. Higher concentrations of E. coli were found in the sampling sites located near the densely populated urban area compared to the downstream site, which receives fewer amounts of discharges from sewer drains. All the E. coli samples violated bathing water quality standards. E. coli concentrations were found to be correlated positively with precipitation and turbidity. A linear regression model was applied, that explains large part of the variation in E. coli concentration (R2 = 0.42). Water quality index assessment was also ranked the water quality as ‘poor’ category; indicate that the water is unsuitable for uses in domestic and recreational purposes and high health risks involved with the water use. The study findings highlight the problem of untreated sewage discharge into the rivers. Implementation of sewage treatment plant with adequate capacity is highly recommended.

show abstract

Effects of rainfalls variability and physical–chemical parameters on enteroviruses in sewage and lagoon in Yopougon, Côte d’Ivoire

Cited by 6 publications

References 47 publications

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

Decoding the DNA and RNA viromes of a tropical urban lagoon

The impact of anthropogenic and environmental factors on the variability of Escherichia coli in rivers in southwest Bangladesh

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