Identification of sources of Escherichia coli in South Carolina estuaries using antibiotic resistance analysis

Webster, Laura F.; Thompson, Brian; Fulton, Michael H.; Chestnut, David E.; Dolah, Robert F. Van; Leight, A.; Scott, Geoffrey I.

doi:10.1016/s0022-0981(03)00358-7

Cited by 55 publications

(55 citation statements)

References 13 publications

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“…Fecal coliform concentrations have been found to be significantly higher (p < 0.0001) in urbanized estuaries than undeveloped estuaries [13]. In a comparison by Mallin, et al [55] of fecal coliform concentrations among five estuarine watersheds, concentrations were significantly correlated with population (p = 0.026), percentage development (p = 0.015), and percent imperviousness (p = 0.005).…”

Section: Total Urban/developedmentioning

confidence: 96%

“…A study by Mallin, Williams, Esham and Lowe [55] concluded that the most important anthropogenic factor influencing fecal coliform concentration is percent imperviousness; impervious surfaces such as driveways, parking lots, roads, roofs, and sidewalks concentrate and transport storm runoff pollutants to receiving waters. Other potential anthropogenic sources of FIB contamination include leaks in sewers, septic tanks, or pump stations and spills or overflows of untreated sewage [6,13].…”

Section: Total Urban/developedmentioning

confidence: 99%

“…In addition, some strains of E. coli that possess the virulence characteristics of uropathogenic strains can survive the wastewater treatment process [11,12]. In areas without wastewater treatment plants, leaking septic systems may release FIB [6,13].…”

Section: Introductionmentioning

confidence: 99%

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Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Brendel

Soupir

2017

Water

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Fecal Indicator Bacteria (FIB) such as Escherichia coli (E. coli) are a leading cause of surface water impairments in the United States. However, the relative impacts of different watershed characteristics on microbial water quality in agriculturally dominated watersheds are unclear. Spatial and statistical analyses were utilized to examine relationships between watershed characteristics and FIB and a multiple regression model was created. Geometric mean E. coli concentration data were obtained for 395 ambient water quality monitoring locations in Iowa. Watersheds were delineated for thirty randomly selected monitoring locations and drainage areas ranged from 93 to 1.1 million hectares. Watershed characteristics examined include area, presence of animal units (open feed lots and confinements), percent of watershed area receiving manure application, presence of point-source discharges, and land cover. The results from the analyses reveal that the presence of animal feeding operations and agriculture, wetland, and woody vegetation land covers are the most influential watershed characteristics regarding E. coli concentration. A significant positive correlation was identified between E. coli concentration and agriculture while significant negative correlations were identified with animal feeding operations and wetland and woody vegetation. Establishing relationships between watershed characteristics and presence of E. coli is needed to identify dominant watershed characteristics contributing to pathogen water impairments and to prioritize remediation efforts.

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Section: Total Urban/developedmentioning

confidence: 96%

Section: Total Urban/developedmentioning

confidence: 99%

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Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Brendel

Soupir

2017

Water

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“…Entre os coliformes, a contagem de Escherichia coli é considerada uma das melhores técnicas para estimar o grau de poluição fecal (Yáñez et al, 2006). Amostras de E. coli resistentes a antimicrobianos têm sido observadas em águas subterrâneas (Mckeon et al, 1995;Gallert et al, 2005), rios (Boon e Cattanach, 1999;Webster et al, 2004) e esgoto (Reinthaler et al, 2003).…”

Section: Introductionunclassified

Perfil de resistência antimicrobiana de isolados de Escherichia coli obtidos de águas superficiais e subterrâneas, em área de produção de suínos

Schneider¹,

Nadvorny²,

Schmidt³

2011

Biotemas

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ResumoA utilização de antimicrobianos, de maneira excessiva e indiscriminada na produção animal intensiva, tem desencadeado o aumento no número de microrganismos resistentes, os quais podem ser transportados para ambientes aquáticos. O objetivo do presente estudo foi determinar o perfil de resistência a antimicrobianos de isolados de Escherichia coli obtidos de águas subterrâneas e superficiais em região de produção de suínos. Através do teste de suscetibilidade antimicrobiana foram analisadas 205 linhagens de E. coli. Observou-se, maior índice de resistência ao cefaclor tanto em águas superficiais (51,9%) quanto subterrâneas (62,9%), enquanto todas as amostras foram sensíveis à amicacina. O percentual de amostras multirresistentes foi de 25,96% e 26,73% em águas superficiais e subterrâneas, respectivamente; enquanto 19,23% e 13,86% foram sensíveis a todos os antimicrobianos testados. Determinou-se que o índice de resistência múltipla aos antimicrobianos (MAR) foi de 0,164 para águas superficiais e 0,184 para subterrâneas. Não foram verificadas diferenças significativas no perfil de resistência a antimicrobianos em linhagens de E. coli isoladas em água superficiais e subterrâneas, mas o índice MAR calculado em pontos de água subterrânea podem oferecer risco potencial de transmissão de genes de resistência. Unitermos: água subterrânea, água superficial, Escherichia coli, resistência antimicrobiana AbstractAntibiotic resistance patterns of Escherichia coli strains isolated from surface water and groundwater samples in a pig production area. The use of antibiotics, so excessive and indiscriminate in intensive animal production, has triggered an increase in the number of resistant microorganisms which can be transported to aquatic environments. The aim of this study was to determine the profile of the antimicrobial resistance of samples of Escherichia coli isolated from groundwater and surface water in a region of pig breeding. Through the test of antimicrobial susceptibility, we analyzed 205 strains of E. coli. A high rate of resistance to cefaclor was observed, both in surface water (51.9%) and groundwater (62.9%), while all samples were sensitive to Biotemas, 22 (3): 11-17, setembro de 2009

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“…Province-SOTE, 2002). Studies have shown that faecal coliforms, more specifically E. coli, increases after a rainfall but thereafter, decrease as a result of the process of sedimentation (Webster et al, 2004;Chigbu et al, 2005;Elmanama et al, 2005). The levels of bacterial contamination in all the five river catchments were widespread during winter and summer seasons.…”

Section: Discussionmentioning

confidence: 93%

Bacterial contamination levels in river catchments of the North West Province, South Africa: Public health implications

Constance¹,

Mbewe²

2012

Afr. J. Microbiol. Res.

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The aim of this study was to examine and compare the levels of bacterial contamination in water obtained from the five river catchments in the North West Province with water quality guidelines. A total of 54 water samples collected during winter and summer seasons were cultured on m-FC and m-Endo agar plates using membrane filtration, and on Plate Count and Eosin Methylene Blue agar plates using spread-plate techniques. Biochemical characterisation of suspected Escherichia coli and Klebsiella isolates by Triple Sugar Iron (TSI) and serotyping using E. coli poly D1-D8 and Klebsiella capsular Types 1-6 antisera were performed for confirmatory identification. Results showed significantly high levels of contamination when using heterotrophic, total and faecal coliform counts as an indicator in all catchments in summer and winter seasons. In winter season, E. coli and Klebsiella were maximal in the Marico and Molopo catchment with 75 and 95% prevalence, respectively. The Crocodile and Elands and Marico and Hex catchments during summer also showed high levels of E. coli (63%) and Klebsiella (76%) contamination, respectively. Contamination levels were widespread and above the South African Department of Water Affairs' guidelines for domestic, recreational and irrigation water were used. The consumption of such untreated water sources directly or indirectly, poses a health risk to consumers. Strict measures to ensure the discharge of properly treated effluent into the rivers should be put in place, to minimise the spread of potential pathogenic bacteria and the occurrence of water borne disease outbreaks.

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Identification of sources of Escherichia coli in South Carolina estuaries using antibiotic resistance analysis

Cited by 55 publications

References 13 publications

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Relating Watershed Characteristics to Elevated Stream Escherichia coli Levels in Agriculturally Dominated Landscapes: An Iowa Case Study

Perfil de resistência antimicrobiana de isolados de Escherichia coli obtidos de águas superficiais e subterrâneas, em área de produção de suínos

Bacterial contamination levels in river catchments of the North West Province, South Africa: Public health implications

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