Browsing by Author "Mekonnen, Amsalu"

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    Bacteriological and Parasitological Quality and Safety Assessment of Public Municipal Drinking Water Sources in Addis Ababa, Ethiopia
    (Addis Abeba Universty, 2016-06) Mekonnen, Amsalu; Mulugeta, Gebru
    Background: In developing counties, disease-associated with poor water still have considerable public health and socio-economic development importance. Water of poor quality can cause water borne diseases by bacteria, viruses, protozoa and parasites. It has been frequently described responsible for millions morbidity and mortality. Therefore, quality and safety status of municipal drinking water of Addis Ababa should be regularly monitored in sustainable manner. Objective: The aim of this study was to assess the bacteriological and parasitological quality and safety status of treated and non-treated municipal drinking water sources in Addis Ababa City. Methodology: A cross-sectional study was carried out on drinking water sources such as public taps, reservoirs, springs and wells managed by Addis Ababa Water and Sewerage Authority (AAWSA). 125ml drinking water of each 2951 samples were collected from water sources and analyzed for bacteriological by Presence/ Absence (P-A) culturing method and 11L drinking water of each were collected from 25 selected reservoirs for parasites identification by direct microscopy. Results: This study revealed that there were 10% of all samples were positive for bacteriological parameters done by presence-absence method. Consequently, 7% and 3% were positive for total coliforms and faecal coliforms respectively. The bacterial distribution trend from 1 to 13 weeks of the first to end of wet season showed a slight increment of total coliforms. Inversely, there was a slight decrement for faecal coli forms. On the other hand, all parasitological tested samples from selected reservoirs were free from intestinal parasites. Conclusion: Samples collected from municipal drinking water sources were positive for fecal coli forms, total coli forms organisms and indicator bacterial species during the study period. It needs continuous screening and treating water sources to utmost important for prevention and control of infectious diseases caused by water transmitted pathogen microorganisms. Therefore, regular and timely research on bacteriology and parasitology is mandatory to overcome crisis resulted from poor water quality. Key words: Presence-Absence test, faecal coliforms, total coliforms, municipal drinking water quality and safety.