ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Billy McBenedict1,2 , Wilhelmina Ndapunikwa Hauwanga1,3, Heike Wanke4, Percy Maruwa Chimwamurombe5 and Bernard Mudenda Hang’ombe2
1School of Public Health, Department of Environmental and Occupational Health, University of Namibia, P.O Box 2654, Eliander Mwatale Street, Oshakati West, Namibia.
2Microbiology Unit, School of Veterinary Medicine, University of Zambia, P.O. Box 32379, Lusaka, Zambia.
3Department of Natural Resource Management, Namibia University of Science and Technology, P.O. Bag 13388, 13 Storch Street, Windhoek, Namibia.
4Geology Department, University of Namibia, 340 Mandume Ndemufayo Avenue, Windhoek, Namibia.
5Department of Natural and Applied Sciences, Namibia University of Science and Technology, P.O. Bag 13388, 13 Storch Street, Windhoek, Namibia.
J Pure Appl Microbiol, 2019, 13 (2): 865-877 | Article Number: 5640
Received: 15/04/2019| Accepted: 10/06/2019 | Published: 21/06/2019
Abstract

Namibia is a large country with a population slightly above 2 million of which 73% live in rural areas. It is the driest country in sub-Saharan Africa with unpredictable rainfall patterns which occur between October and May. The Cuvelai Etosha Basin is a rural setting in which most people depend on groundwater to circumvent water scarcity by the construction of hand-dug wells. Communities consume hand-dug well water throughout the year without; knowledge of its safety, and treatment prior to use. Hence, this study aimed at evaluating the seasonal safety and quality of hand-dug well water for human consumption. A 16S rRNA metagenomics study was conducted to explore the influence of season on the human pathogenic bacterial species richness, diversity, evenness and abundance in the hand-dug wells. Bacterial pathogens were identified and analysis revealed no significant difference in species richness and diversity, and a significant difference in species evenness and abundance between the wet and dry seasons. Hence, seasonality had an influence on human bacterial pathogens evenness and abundance but had no influence on species richness and diversity. In addition, the water in hand-dug wells of the Cuvelai Etosha Basin is not safe for consumption and domestic use unless sanitized. It is recommended that efforts should be made to treat the water prior to use, and hand-dug wells should be properly constructed to reduce contamination.

Keywords

Cuvelai Etosha Basin, Diversity, Evenness, Hand-dug well, Human bacterial pathogens, Metagenomics, Richness, Water.

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© The Author(s) 2019. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.