scholarly journals The occurrence of Enterobacteriaceae in the well water of Nallur Divisional Secretariat area of Jaffna district, Sri Lanka

2021 ◽  
Vol 15 (2) ◽  
pp. 23
Author(s):  
A. Briyangari
Keyword(s):  
Sri Lanka ◽  
Well Water

Potentially pathogenic bacteria isolated from different tropical waters in Sri Lanka

2013 ◽  
Vol 13 (6) ◽  
pp. 1463-1469 ◽  
Author(s):  
W. M. G. C. K. Mannapperuma ◽  
C. L. Abayasekara ◽  
G. B. B. Herath ◽  
D. R. I. B. Werellagama
Keyword(s):  
Surface Water ◽  
Sri Lanka ◽  
Water Samples ◽  
Pathogenic Bacteria ◽  
Water Sources ◽  
Bottled Water ◽  
Well Water ◽  
Faecal Coliforms ◽  
Total Coliforms ◽  
Source Waters

This study investigated the bacteriological contamination of different water sources in Sri Lanka. Source waters (n = 74) including bottled water, well water and surface water were assessed for enumerating total coliforms and faecal coliforms using the membrane filtration method. The results showed that 18.5 and 14.8% of bottled water samples were contaminated with total coliforms and faecal coliforms, respectively. All the well water and surface water samples exceeded the WHO permitted levels for total coliforms and faecal coliforms. Bacteriological identification using biochemical tests and api 20E identification tests revealed the presence of potentially pathogenic bacteria in all water sources tested. Bottled water mainly contained three Enterobacter species, while well water samples showed the broadest spectrum of bacteria including eleven coliform species belonging to the genera Klebsiella, Escherichia, Enterobacter, Citrobacter, Kluyvera, Pantoea, Rautella, and 10 non-coliform species in the genera Pseudomonas, Aeromonas, Salmonella and Acinetobacter. Surface waters contained seven coliform species belonging to the genera Klebsiella, Escherichia, Citrobacter, Rautella and Serratia, and eight non-coliform species in the genera Pseudomonas, Aeromonas and Acinetobacter. Detection of higher bacteriological counts and identification of potentially pathogenic bacteria in different source waters suggest a potential health risk of the water sources used in Sri Lanka.

scholarly journals Arsenic, cadmium, lead, and chromium in well water, rice, and human urine in Sri Lanka in relation to chronic kidney disease of unknown etiology

2018 ◽  
Vol 16 (2) ◽  
pp. 212-222 ◽  
Author(s):  
H. M. Ayala S. Herath ◽  
Tomonori Kawakami ◽  
Shiori Nagasawa ◽  
Yuka Serikawa ◽  
Ayuri Motoyama ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Sri Lanka ◽  
Kidney Disease ◽  
Human Urine ◽  
Urine Samples ◽  
Unknown Etiology ◽  
Well Water ◽  
Rice Samples ◽  
Endemic Areas ◽  
Cadmium Lead

Abstract Chronic kidney disease of unknown etiology (CKDu) is spreading gradually in Sri Lanka. In the current research, 1,435 well water samples from all 25 districts of Sri Lanka, 91 rice samples, and 84 human urine samples from both CKDu-endemic and non-endemic areas in Sri Lanka were analyzed for arsenic, cadmium, lead, and chromium to detect whether toxic elements could be a cause of CKDu. The liver-type fatty acid binding protein (L-FABP) concentration and arsenic, cadmium, lead, and chromium concentrations of the urine samples were analyzed to determine the relation of L-FABP with arsenic, cadmium, lead, and chromium. High concentrations of arsenic, cadmium, lead, and chromium were not detected in the well water samples from CKDu-endemic areas. Arsenic, cadmium, and lead contents in the rice samples from both CKDu-endemic and non-endemic areas were well below the Codex standard. There were no relationships between the L-FABP concentration and concentrations of arsenic, cadmium, lead, and chromium in urine. In addition, arsenic, cadmium, lead, and chromium concentrations in human urine samples from CKDu-endemic areas were not significantly different from those from non-endemic areas. These findings indicated that arsenic, cadmium, lead, and chromium could not cause CKDu.

scholarly journals Characterization of agro-well water in Malwathu Oya cascade-I in Anuradhapura district of Sri Lanka

2015 ◽  
Vol 25 (1) ◽  
pp. 46 ◽  
Author(s):  
M.K.N. Kumari ◽  
S. Pathmarajah ◽  
N.D.K. Dayawansa
Keyword(s):  
Sri Lanka ◽  
Well Water

Geochemistry of well water and cardiovascular diseases in Sri Lanka

1982 ◽  
Vol 19 (3-4) ◽  
pp. 195-203 ◽  
Author(s):  
C. B. Dissanayake ◽  
A. Senaratne ◽  
S. V. R. Weerasooriya
Keyword(s):  
Cardiovascular Diseases ◽  
Sri Lanka ◽  
Well Water

scholarly journals Drinking well water and occupational exposure to Herbicides is associated with chronic kidney disease, in Padavi-Sripura, Sri Lanka

2015 ◽  
Vol 14 (1) ◽  
Author(s):  
Channa Jayasumana ◽  
Priyani Paranagama ◽  
Suneth Agampodi ◽  
Chinthaka Wijewardane ◽  
Sarath Gunatilake ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Occupational Exposure ◽  
Sri Lanka ◽  
Kidney Disease ◽  
Well Water

scholarly journals The water chemistry and microbiome of household wells in Medawachchiya, Sri Lanka, an area with high prevalence of chronic kidney disease of unknown origin (CKDu)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Liza K. McDonough ◽  
Karina T. Meredith ◽  
Chandima Nikagolla ◽  
Ryan J. Middleton ◽  
Jian K. Tan ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Drinking Water ◽  
Chemical Composition ◽  
Sri Lanka ◽  
Kidney Disease ◽  
Water Chemistry ◽  
Gut Microbiome ◽  
Unknown Etiology ◽  
Well Water ◽  
Human Gut

Abstract Chronic kidney disease (CKD) of unknown etiology (CKDu) mostly affects agricultural communities in Central America, South Asia, Africa, but likely also in North America and Australia. One such area with increased CKDu prevalence is the Medawachchiya District Secretariat Division of the Anuradhapura District in the North Central Province of Sri Lanka. Recent research has focused on the presence of various microbial pathogens in drinking water as potential causal or contributing factors to CKDu, yet no study to date has performed a more comprehensive microbial and water chemistry assessment of household wells used for domestic water supply in areas of high CKDu prevalence. In this study, we describe the chemical composition and total microbial content in 30 domestic household wells in the Medawachchiya District Secretariat Division. While the chemical composition in the tested wells mostly lies within standard drinking water limits, except for high levels of fluoride (F), magnesium (Mg), sodium (Na), chloride (Cl) and calcium (Ca) in some samples, we find a frequent presence of cyanotoxin-producing Microcystis, confirming earlier studies in Sri Lanka. Since the total microbial content of drinking water also directly influences the composition of the human gut microbiome, it can be considered an important determinant of health. Several bacterial phyla were previously reported in the gut microbiome of patients with CKD. Using these bacteria phyla to define operational taxonomic units, we found that these bacteria also occur in the microbiome of the sampled well water. Based on available environmental data, our study demonstrates associations between the abundances of these bacteria with geographical distribution, well water temperature and likely fertilizer use in the local surface water catchment area of the individual household wells. Our results reinforce the recommendation that household wells with stagnant or infrequently used water should be purged prior to use for drinking water, bathing and irrigation. The latter is suggested because of the reported potential accumulation of bacterial toxins by agricultural crops. The observation that bacteria previously found in chronic kidney disease patients are also present in household wells requires a more detailed systematic study of both the human gut and drinking water microbiomes in CKDu patients, in relation to disease prevalence and progression.

scholarly journals Contaminated Public well water as a source of sporadic outbreak of enteric infection in Northern Sri Lanka

2015 ◽  
Vol 5 (2) ◽  
pp. 64 ◽  
Author(s):  
C.A. Arulnesan ◽  
S. Kamsan ◽  
N. Rajeshkannan ◽  
K. Sivapalan ◽  
K Murugananthan
Keyword(s):  
Sri Lanka ◽  
Well Water ◽  
Enteric Infection
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