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Bacterial contamination and health risks of drinking water from the municipal non-government managed water treatment plants

Environmental Monitoring and Assessment volume 190, Article number: 685 (2018) Cite this article

Abstract

Water quality and bacterial contamination from 18 drinking water municipal plants in three locations at Giza governorate were investigated. The average total count of bacteria detected after four stages of treatments in the investigated plants was 32 CFU/1 mL compared to 2330 cfu/mL for raw water, with a reduction percentage of 98.6. Although there is a relatively high removal percent of bacterial contamination from the water sources, however, several bacterial pathogens were identified in the produced water prepared for drinking including Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, and Shigella spp. After 3 days of water incubation at 30 °C, the amount of bacterial endotoxins ranged from 77 to 137 ng/mL in the water produced from the municipal plants compared to 621–1260 ng/mL for untreated water. The main diseases reported from patients attending different clinics and hospitals during summer 2014 at the surveyed locations and assuredly due to drinking water from these plants indicated that diarrheas and gastroenteritis due to E. coli and Campylobacter jejuni constituted 65.7% of the total patients followed by bacillary dysentery or shigellosis due to Shigella spp. (7.9%) and cholera due to Vibrio cholera (7.2%). There was an increase in serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) as well as urea and creatinine values of guinea pigs consuming water produced from the non-governmental plants for 6 months indicating remarkable liver and kidney damages. Histological sections of liver and kidney from the tested animal revealed liver having ballooning degeneration of hepatocytes and distortion and fragmentation of the nuclei, while the section of the kidney showed irregularly distributed wrinkled cells, degenerated Bowman’s capsule, congested blood vessels, and inflammatory cells.

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Authors and Affiliations

  1. Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, 12613, Egypt

    Salama A. Ouf, Ramy S. Yehia & Rania F. Abdul-Rahim

  2. Kasr Al Ainy Medical School, Cairo University, Cairo, Egypt

    Ahmed S. Ouf

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  1. Salama A. Ouf
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  2. Ramy S. Yehia
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  3. Ahmed S. Ouf
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Correspondence to Salama A. Ouf.

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This manuscript received ethical clearance from the Ethic Committee of Cairo University, Egypt, and Egyptian Ministry of Health. Informed data were obtained from the patients, clinics, and hospitals.

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Ouf, S.A., Yehia, R.S., Ouf, A.S. et al. Bacterial contamination and health risks of drinking water from the municipal non-government managed water treatment plants. Environ Monit Assess 190, 685 (2018). https://doi.org/10.1007/s10661-018-7054-z

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Keywords

  • Drinking water
  • Treatment plants
  • Contamination
  • Bacteria
  • Disease outbreak
  • Liver and kidney damage