scholarly journals Inactivation of faecal indicator bacteria in a roof-captured rainwater system under ambient meteorological conditions

2013 ◽  
Vol 116 (1) ◽  
pp. 199-207 ◽  
Author(s):  
W. Ahmed ◽  
K. Richardson ◽  
J.P.S. Sidhu ◽  
P. Jagals ◽  
S. Toze
Keyword(s):  
Meteorological Conditions ◽  
Indicator Bacteria ◽  
Faecal Indicator Bacteria

scholarly journals Spatial and temporal variations of faecal indicator bacteria in Lake Bunyonyi, South-Western Uganda

2021 ◽  
Vol 3 (7) ◽  
Author(s):  
Alex Saturday ◽  
Thomas J. Lyimo ◽  
John Machiwa ◽  
Siajali Pamba
Keyword(s):  
Health Risks ◽  
Rank Correlation ◽  
Temporal Variations ◽  
Indicator Bacteria ◽  
Spatial And Temporal Variations ◽  
Wet Season ◽  
Recreational Waters ◽  
Faecal Indicator Bacteria ◽  
E Coli ◽  
Spearman’S Rank Correlation

AbstractBackground Microbial water quality serves to indicate health risks associated with the consumption of contaminated water. Nevertheless, little is known about the microbiological characteristics of water in Lake Bunyonyi. This study was therefore undertaken to examine the spatial and temporal variations of faecal indicator bacteria (FIB) in relation to physicochemical parameters in Lake Bunyonyi. Result The FIB concentration was consistently measured during sampling months and correlated with each other showing the presumed human faecal pollution in the lake. The highest concentration values for E. coli (64.7 ± 47.3 CFU/100 mL) and enterococci (24.6 ± 32.4 CFU/100 mL were obtained in the station close to the Mugyera trading centre. On a temporal basis, the maximum values were recorded during the rainy season in October 2019 (70.7 ± 56.5 CFU/100 mL for E. coli and 38.44 ± 31.8 CFU/100 mL for enterococci. FIB did not differ significantly among the study stations (p > 0.05) but showed significant temporal variations among the months (p < 0.05) with concentrations being significantly high in wet season than dry season (U = 794, p < 0.0001 for E. coli; U = 993.5, p = 0.008 for enterococci). Spearman’s rank correlation revealed that FIB concentrations were significantly positively correlated with turbidity and DO concentration levels (p < 0.05). Approximately 97.2% of the water samples had E. coli and enterococci concentrations levels below USEPA threshold for recreational waters. Likewise, 98.1 and 90.7% of samples recorded E. coli and enterococci counts exceeding the UNBS, APHA, WHO and EU threshold values for drinking water. Conclusion The FIB counts show that the Lake Bunyonyi water is bacteriologically unsuitable for drinking unless it is treated since the FIB pose health risks to consumers. Besides, the water can be used for recreational purposes.

scholarly journals Pilot- and bench-scale testing of faecal indicator bacteria survival in marine beach sand near point sources

2009 ◽  
Vol 107 (1) ◽  
pp. 72-84 ◽  
Author(s):  
K.B. Mika ◽  
G. Imamura ◽  
C. Chang ◽  
V. Conway ◽  
G. Fernandez ◽  
...  
Keyword(s):  
Point Sources ◽  
Indicator Bacteria ◽  
Beach Sand ◽  
Faecal Indicator Bacteria ◽  
Bench Scale

Demonstration of an optical biosensor for the detection of faecal indicator bacteria in freshwater and coastal bathing areas

2019 ◽  
Vol 411 (29) ◽  
pp. 7637-7643
Author(s):  
Ciprian Briciu-Burghina ◽  
Brendan Heery ◽  
Gillian Duffy ◽  
Dermot Brabazon ◽  
Fiona Regan
Keyword(s):  
Optical Biosensor ◽  
Indicator Bacteria ◽  
Faecal Indicator Bacteria

Monitoring coastal marine waters for spore-forming bacteria of faecal and soil origin to determine point from non-point source pollution

2001 ◽  
Vol 44 (7) ◽  
pp. 181-181 ◽  
Author(s):  
R. S. Fujioka
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Quality Standards ◽  
Indicator Bacteria ◽  
Recreational Water ◽  
Water Quality Standards ◽  
Point Source Pollution ◽  
Faecal Indicator Bacteria ◽  
Recreational Water Quality ◽  
Non Point Source Pollution

The US Environmental Protection Agency (USEPA) and the World Health Organization (WHO) have established recreational water quality standards limiting the concentrations of faecal indicator bacteria (faecal coliform, E. coli, enterococci) to ensure that these waters are safe for swimming. In the application of these hygienic water quality standards, it is assumed that there are no significant environmental sources of these faecal indicator bacteria which are unrelated to direct faecal contamination. However, we previously reported that these faecal indicator bacteria are able to grow in the soil environment of humid tropical island environments such as Hawaii and Guam and are transported at high concentrations into streams and storm drains by rain. Thus, streams and storm drains in Hawaii contain consistently high concentrations of faecal indicator bacteria which routinely exceed the EPA and WHO recreational water quality standards. Since, streams and storm drains eventually flow out to coastal marine waters, we hypothesize that all the coastal beaches which receive run-off from streams and storm drains will contain elevated concentrations of faecal indicator bacteria. To test this hypothesis, we monitored the coastal waters at four beaches known to receive water from stream or storm drains for salinity, turbidity, and used the two faecal indicator bacteria (E. coli, enterococci) to establish recreational water quality standards. To determine if these coastal waters are contaminated with non-point source pollution (streams) or with point source pollution (sewage effluent), these same water samples were also assayed for spore-forming bacteria of faecal origin (Cl. perfringens) and of soil origin (Bacillus species). Using this monitoring strategy it was possible to determine when coastal marine waters were contaminated with non-point source pollution and when coastal waters were contaminated with point source pollution. The results of this study are most likely applicable to all countries in the warm and humid region of the world.

scholarly journals Temporal variation of faecal indicator bacteria in tropical urban storm drains

2015 ◽  
Vol 68 ◽  
pp. 171-181 ◽  
Author(s):  
E. Ekklesia ◽  
P. Shanahan ◽  
L.H.C. Chua ◽  
H.S. Eikaas
Keyword(s):  
Temporal Variation ◽  
Indicator Bacteria ◽  
Faecal Indicator Bacteria ◽  
Urban Storm
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