Comparative Survival of Indicator Bacteria and Enteric Pathogens in Well Water

McFeters, Gordon A.; Bissonnette, Gary K.; Jezeski, J. J.; Thomson, Carole A.; Stuart, David G.

doi:10.1128/aem.27.5.823-829.1974

Cited by 173 publications

(75 citation statements)

References 9 publications

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“…According to our previous research [19], the infectious period of asymptomatic infection could be simulated 5 weeks in our model, thus γ' = 0.0286. Because of that the die-off rate of Shigella spp is about 24.5 h [29], ε = 0.6931 was consequently simulated [19]. In our previous research [19], a typical case has diarrhea about 3.2 times (range 3-12 times) per day but an asymptomatic individual only sheds stool once per day, thus c = 0.3125.…”

Section: Parameter Estimationmentioning

confidence: 99%

Epidemiological characteristics and transmissibility of shigellosis in Hubei Province, China, 2005 – 2017

Chen

Rui

et al. 2020

BMC Infect Dis

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Background: Shigellosis is one of the main diarrhea diseases in developing countries. However, the transmissibility of shigellosis remains unclear. Methods: We used the dataset of shigellosis cases reported between January 2005 and December 2017, from Hubei Province, China. A mathematical model was developed based on the natural history and the transmission mechanism of the disease. By fitting the data using the model, transmission relative rate from person to person (b) and from reservoir to person (b w ), and the effective reproduction number (R eff ) were estimated. To simulate the contribution of b and b w during the transmission, we performed a "knock-out" simulation in four scenarios:Results: A total of 130,770 shigellosis cases were reported in Hubei province, among which 13 cases were dead. The median annual incidence was 19.96 per 100,000 persons (range: 5.99 per 100,000 persons -29.47 per 100,000 persons) with a decreased trend (trend χ 2 = 25,470.27, P < 0.001). The mean values of b and b w were 0.0898 (95% confidence interval [CI]: 0.0851-0.0946) and 1.1264 × 10 − 9 (95% CI: 4.1123 × 10 − 10 -1.8416 × 10 − 9 ), respectively. The "knock-out" simulation showed that the number of cases simulated by scenario A was almost the same as scenario B, and scenario C was almost the same as scenario D. The mean value of R eff of shigellosis was 1.19 (95% CI: 1.13-1.25) and decreased slightly with a Linear model until it decreased to an epidemic threshold of 0.99 (95% CI: 0.65-1.34) in 2029. Conclusions:The incidence of shigellosis is still in high level. The transmissibility of the disease is low in Hubei Province. The transmission would be interrupted in the year of 2029.

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Section: Parameter Estimationmentioning

confidence: 99%

Epidemiological characteristics and transmissibility of shigellosis in Hubei Province, China, 2005 – 2017

Chen

Rui

et al. 2020

BMC Infect Dis

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“…Among indicator bacteria, E. coli and Enterococcus spp. are most commonly used as the target organisms for bacterial source tracking in seawater (Bitton et al, 1983;Hanes and Fragala, 1967;Keswick et al, 1982;McFeters et al, 1974;Omura et al, 1982;Wait and Sobsey, 2001). E. coli are a dominant intestinal bacterial population in swine, colonizing the intestine distal to the stomach (Schierack et al, 2006).…”

Section: Article In Pressmentioning

confidence: 99%

Source identification of airborne Escherichia coli of swine house surroundings using ERIC-PCR and REP-PCR

Duan

Chai

Liu

et al. 2009

Environmental Research

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Evidence is mounting that microorganisms originating from livestock impact the air quality of the animal houses themselves and the public in the surrounding neighborhoods. The aim of this study was to develop efficient bacterial source tracking capabilities to identify sources of Escherichia coli aerosol pollution caused by pigs. Airborne E. coli were isolated from indoor air, upwind air (10 and 50 m away) and downwind air samples (10, 50, 100, 200 and 400 m away) for five swine houses using six-stage Andersen microbial samplers and Reuter-Centrifugal samplers (RCS). E. coli strains from pig fecal samples were also collected simultaneously. The enterobacterial repetitive intergenic consensus polymerize chain reaction (ERIC-PCR) and the repetitive extragenic palindromic (REP-PCR) approaches were used to study the genetic variability and to determine the strain relationships among E. coli isolated from different sites in each swine house. Results showed that 35.1% (20/57) of the bacterial DNA fingerprints from the fecal isolates matched with the corresponding strains isolated from indoor and downwind air samples (similarity > or = 90%). E. coli strains from the indoor and downwind air samples were closely related to the E. coli strains isolated from feces, while those isolated from upwind air samples (swine house C) had low similarity (61-69%). Our results suggest that some strains isolated from downwind and indoor air originated in the swine feces. Effective hygienic measures should be taken in animal farms to prevent or minimize the downwind spread of microorganism aerosol.

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“…Changes in number of aerobes during period of the study waters showed similar concentrations for both. These results indicate that the E have a greater capacity for invasion and survival (McFeters et al 1974;Schaub and Sorber 1977), even enabling the identification of different species and serotypes (Khalaf and Muhammad 1989).…”

Section: Figmentioning

confidence: 92%

Bacteriological indicators of faecal contamination: result of a loading experiment with untreated urban wastewater

Ramos‐Cormenzana

Castillo

Incerti

et al. 1994

Journal of Applied Bacteriology

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Some observations were made on the behaviour of total coliforms, faecal coliforms, enterococci, numbers of aerobic bacteria, salmonellas and sulphur-reducing clostridia as bacterial indicators of faecal contamination of groundwater. A controlled irrigation experiment was carried out with untreated residual water in the alluvial aquifer of the Vega of Granada (Spain). The results obtained confirm the value of these parameters are useful indicators of very recent faecal contamination; and changes were detected as the level of the freatic layer increased and the chemical composition of the groundwater changed. These groups of micro-organisms persisted for about 200 h, with the exception of the aerobes which survived for much longer. Salmonellas were present at levels too low to calculate the extent of faecal contamination and sulphur-reducing clostridia were not detected. The results obtained show that irrigation with untreated wastewater offers a lower risk of microbiological contamination of groundwater compared with the direct addition of waters decanted and/or previously filtered.

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Comparative Survival of Indicator Bacteria and Enteric Pathogens in Well Water

Cited by 173 publications

References 9 publications

Epidemiological characteristics and transmissibility of shigellosis in Hubei Province, China, 2005 – 2017

Epidemiological characteristics and transmissibility of shigellosis in Hubei Province, China, 2005 – 2017

Source identification of airborne Escherichia coli of swine house surroundings using ERIC-PCR and REP-PCR

Bacteriological indicators of faecal contamination: result of a loading experiment with untreated urban wastewater

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