Detection of Escherichia coli, Salmonella species, and Vibrio cholerae in tap water and bottled drinking water in Isfahan, Iran

Momtaz, Hassan; Dehkordi, Farhad Safarpoor; Rahimi, Ebrahim; Asgarifar, Amin

doi:10.1186/1471-2458-13-556

Cited by 75 publications

(68 citation statements)

References 30 publications

(24 reference statements)

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“…The erratic supply of safe drinking and domestic water often affects good hygiene practices. In most developing countries of the world, inadequate supplies of drinking water can contribute to the underage death of children in the region [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Challenges to Sustainable Safe Drinking Water: A Case Study of Water Quality and Use across Seasons in Rural Communities in Limpopo Province, South Africa

Edokpayi

Rogawski

Kahler

et al. 2018

Water

105

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Consumption of microbial-contaminated water can result in diarrheal illnesses and enteropathy with the heaviest impact upon children below the age of five. We aimed to provide a comprehensive analysis of water quality in a low-resource setting in Limpopo province, South Africa. Surveys were conducted in 405 households in rural communities of Limpopo province to determine their water-use practices, perceptions of water quality, and household water-treatment methods. Drinking water samples were tested from households for microbiological contamination. Water from potential natural sources were tested for physicochemical and microbiological quality in the dry and wet seasons. Most households had their primary water source piped into their yard or used an intermittent public tap. Approximately one third of caregivers perceived that they could get sick from drinking water. All natural water sources tested positive for fecal contamination at some point during each season. The treated municipal supply never tested positive for fecal contamination; however, the treated system does not reach all residents in the valley; furthermore, frequent shutdowns of the treatment systems and intermittent distribution make the treated water unreliable. The increased water quantity in the wet season correlates with increased treated water from municipal taps and a decrease in the average contaminant levels in household water. This research suggests that wet season increases in water quantity result in more treated water in the region and that is reflected in residents' water-use practices.

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Section: Introductionmentioning

confidence: 99%

Challenges to Sustainable Safe Drinking Water: A Case Study of Water Quality and Use across Seasons in Rural Communities in Limpopo Province, South Africa

Edokpayi

Rogawski

Kahler

et al. 2018

Water

105

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show abstract

“…Unfortunately bottled water can be easily tainted, by neglectful packaging, storage, or intentional substitution with tap water. Problems with bottled water not meeting generally accepted standards were already described in Asia including Bangladesh 2, India, China 3, Middle East: Iran 4, Africa: Tanzania 5, Nigeria 6 and South America: Brazil 7.…”

Section: Introductionmentioning

confidence: 99%

Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor–π–Acceptor Chromophore

Yang

Zhu

et al. 2015

ChemPhysChem

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The photophysical properties of intramolecular charge transfer (ICT) in a novel tribranched donor-π-acceptor chromophore, triphenoxazine-2,4,6-triphenyl-1,3,5-triazine (tri-PXZ-TRZ), with thermally activated delayed fluorescence character was investigated in different aprotic solvents by steady-state spectroscopy and femtosecond and nanosecond transient absorption spectroscopy measurements. Increasing the solvent polarity led to a significant increase in the Stokes shift. The large Stokes shift in highly polar solvents was attributed to ICT properties upon excitation; this resulted in a strong interaction between the tri-PXZ-TRZ molecule and the surrounding solvent, which led to a strong solvation process. Quantum-chemical calculations and changes in the dipole moment showed that this compound has a large degree of ICT. Furthermore, an apolar environment helped to preserve the symmetry of tri-PXZ-TRZ and to enhance its emission efficiency. The femtosecond and nanosecond transient absorption spectroscopy results indicated that the excited-state dynamics of this push-pull molecule were strongly influenced by solvent polarity through the formation of a solvent-stabilized ICT state. The excited-state relaxation mechanism of tri-PXZ-TRZ was proposed by performing target model analysis on the femtosecond transient absorption spectra. In addition, the delayed fluorescence of tri-PXZ-TRZ was significantly modulated by a potential competition between solvation and intersystem crossing processes.

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“…Few previous studies related to the Salmonella contamination in the water sources of various regions of the Iran was investigated by the various researchers. In this context, Momtaz et al (2013) examined the presence of Salmonella spp. in packaged potable water and tap (pipeline) water in Iran.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Salmonella spp. in water sources of Sistan: A descriptive cross-sectional study

Nazemi¹,

Salari²,

Eskandani³

2017

JEBAS

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This study was aimed to survey the prevalence of Salmonella spp. in water sources of Sistan and Baluchistan Province, Iran. Total 100 samples were collected from different sites and divided on the basis of potability, geographic location, accessibility, consumption and water flow types. Protocols issued by Institute of Standards and Industrial Research of Iran were used to detect Salmonella spp. Results of study revealed that 74.6% water sources shows the presence of Salmonella spp. Among studied sources, only one sample of potable water was contaminated with Salmonella spp. The highest contamination was reported from still water and it was significantly different that the pipe water (p<0.05). The highest contamination among non-potable water was reported from Jazinak compared to other regions. Further, it was reported that non-potable water is mostly used for non-agricultural consumption and it was found to be more polluted than water used for irrigation (p<0.05). The highest contamination with Salmonella was reported in ponds water (p<0.05). Non-potable water collected from east region of Sistan was reported more polluted than the west region. Contamination of non-potable water resources in the study area was high. Potable water, totally, indicates the proper function of the Salmonella treatment plan of water refinery of Sistan. Non-potable water of study area is polluted. Identification of Salmonella serotype and antibiotic susceptibility testing serve as indicators to define the accurate level of contamination.

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Detection of Escherichia coli, Salmonella species, and Vibrio cholerae in tap water and bottled drinking water in Isfahan, Iran

Cited by 75 publications

References 30 publications

Challenges to Sustainable Safe Drinking Water: A Case Study of Water Quality and Use across Seasons in Rural Communities in Limpopo Province, South Africa

Challenges to Sustainable Safe Drinking Water: A Case Study of Water Quality and Use across Seasons in Rural Communities in Limpopo Province, South Africa

Photophysical Properties of Intramolecular Charge Transfer in a Tribranched Donor–π–Acceptor Chromophore

Prevalence of Salmonella spp. in water sources of Sistan: A descriptive cross-sectional study

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