Incidence of coliphage in potable water supplies

El-Abagy, Mohamed M.; Dutka, B. J.; Kamel, M. M.; Zanfaly, H T el

doi:10.1128/aem.54.6.1632-1633.1988

Cited by 24 publications

(11 citation statements)

References 4 publications

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“…However, bacteriophages of the three groups studied were still detected in all the chlorinated samples. This will agree with published observations about detecting bacteriophages in disinfected waters that fulfilled the bacteriological criteria but still contained bacteriophages (El‐Abagy et al. 1988; Ratto et al.…”

Section: Discussionsupporting

confidence: 92%

Usefulness of different groups of bacteriophages as model micro-organisms for evaluating chlorination

et al. 2003

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Aims: To assess the usefulness of bacterial and viral indicators in chlorination processes and to collect quantitative information necessary for risk assessment analysis in water disinfection processes based on chlorination. Methods and Results: Naturally occurring bacterial indicators, bacteriophages and enteroviruses were determined to evaluate the effect of chlorination in groundwater and secondary sewage effluents. Additionally, the effect of chlorinating on selected bacteriophages, enteroviruses and Escherichia coli was also tested in spiked samples of bottled water and sewage effluents. Results indicate that chlorination inactivates more efficiently bacteria than phages and enteroviruses. Among the human viruses, phages infecting Bacteroides fragilis and selected somatic coliphages belonging to the Siphoviridae family were the most persistent to chlorination. Conclusions: The three groups of bacteriophages studied were all more resistant to chlorination than bacteria and some of the phages were more resistant than enteroviruses. Results presented here indicate that it is very risky to generalize from information obtained with inactivation experiments done with single isolates of any phage or virus. If possible, inactivation studies should be done with naturally occurring populations. Phages offer a good opportunity for studying naturally occurring populations. Thus, the bacteriophages offer a range of resistance to chlorination that may represent most of the viruses that can be found in water. Significance and Impact of the Study: Data reported in this study support the inclusion of bacteriophages as additional indicators of the efficiency of water chlorination processes and water quality.

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Section: Discussionsupporting

confidence: 92%

Usefulness of different groups of bacteriophages as model micro-organisms for evaluating chlorination

et al. 2003

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“…The data in this table show that there are little differences among the sum ranks of the three techniques. These differences are not significant at the 1% level and are in agreement with the other studies in the IDRC coliphage program (Ratto et al, 1988;Castillo et al, 1988;El Abagy et al, 1988).…”

Section: R a W Watersupporting

confidence: 92%

Coliphage association with coliform indicators: A case study—Brazil

Martins¹,

El‐Shaarawi

Dutka

et al. 1989

Environ. Toxicol. Water Qual.

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Many microbiological tests are currently available for evaluating the suitability of water resources for human use. Cost, speed, simplicity, and the ability of the test to detect microbial contamination are some of the key factors involved in selecting the appropriate test. The performance of the test often depends on the nature of the tested water and hence it is necessary to evaluate the test under local conditions. This paper compares the performance of several microbiological tests on Brazilian waters. These tests include traditional coliform tests, and the presence/absence and coliphage tests.

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“…Fecal coliform densities ranged from 13-350 MPNI100 mL for the coliphage-positive samples, and the correlation between fecal coliforms and coliphage varied from 1 : 2 to 1:35. In no instance were coliphage recovered from coliform-free potable waters as has been noted recently in Singapore (Sim and Dutka, 1987) and Egypt (El-Abagy -~~ et al, 1987).…”

Section: /Castillo Et Almentioning

confidence: 83%

Coliphage association with coliform indicators: A case study in Chile

Castillo

Thiers

Dutka

et al. 1988

Environ. Toxicol. Water Qual.

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This paper summarizes the results obtained from an International Development Research Centre (IDRC), Ottawa, Canada, funded study to evaluate the potential of using coliphage as an indicator of water quality. Raw water sample data indicated that the A‐1 test combined with the coliphage test would make an excellent screening program for health hazards in these waters. The superiority of the Presence/Absence test for detecting microbial health hazards in potable water was readily shown, while the H2S paper strip technique was found to be equally efficient for testing potable waters as traditional coliform water quality indicators.

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Incidence of coliphage in potable water supplies

Cited by 24 publications

References 4 publications

Usefulness of different groups of bacteriophages as model micro-organisms for evaluating chlorination

Usefulness of different groups of bacteriophages as model micro-organisms for evaluating chlorination

Coliphage association with coliform indicators: A case study—Brazil

Coliphage association with coliform indicators: A case study in Chile

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