Enumeration of Somatic and F-RNA Phages as an Indicator of Fecal Contamination in Potable Water from Rural Areas of the North West Province

Pathogens

Keitumetse Idah Nkwe²  Collins Njie Ateba²  Nomathamsanqa Patricia Sithebe²  Cornelius Carlos Bezuidenhout¹ 

[1] Unit for Environmental Science and Management, Faculty of Natural Science, North-West University, Potchefstroom Campus, Potchefstroom 2531, South Africa; E-Mail:;Department of Biological Sciences, School of Environmental and Health Sciences, North West University, Mafikeng Campus, Mmabatho, Mafikeng 2735, South Africa; E-Mails:

关键词: somatic phage;    F-RNA phage;    rural water supply;    groundwater;    potable water contamination;   

DOI  :  10.3390/pathogens4030503

来源: mdpi

【 摘 要 】

Bacteriophages are regarded as enteric viral indicators in faecally contaminated water systems and may indicate the presence of human viral pollution. They are relatively resistant to inactivation by natural and treatment processes. In this study, the presence of somatic coliphages and F-RNA coliphages was investigated in potable water from rural areas in the North West province. Water samples were aseptically collected from boreholes and tap water from some rural communities in the North West Province. Physical parameters of the water, such as the temperature, pH and turbidity, were measured before sample collection. Double-agar layer assay was performed using ISO, (1995, 2000) standard methods. Bottled water was used as a negative control and the strains фX174 and MS2 as positive controls. Of the 16 water samples collected, 15 were positive for somatic bacteriophages while F-RNA coliphages were detected in only two samples. Amongst the positive samples 189 and three plaque forming units were obtained for both somatic and F-RNA coliphages, respectively. No coliphage was detected in water from Masamane tap 1. The rest of the samples obtained from various rural areas were positive and did not comply with national and international standards for potable water. This was a cause for concern and should be further investigated.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.