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Physico-chemical analysis and identification of antibiotics resistant Enterobacteriaceae from groundwater sources in Ayobo, Lagos, Nigeria

Author Affiliations

  • 1Faculty of Natural, Applied and Health Sciences, Department of Biological Sciences, Anchor University, Lagos, Nigeria
  • 2Faculty of Natural, Applied and Health Sciences, Department of Biological Sciences, Anchor University, Lagos, Nigeria
  • 3Faculty of Natural, Applied and Health Sciences, Department of Biological Sciences, Anchor University, Lagos, Nigeria
  • 4Faculty of Natural, Applied and Health Sciences, Department of Biological Sciences, Anchor University, Lagos, Nigeria

Int. Res. J. Environment Sci., Volume 12, Issue (3), Pages 13-22, October,22 (2023)


This study aimed at evaluating the physico-chemical parameters and detection of Enterobacteriaceae of groundwater samples in Ayobo, Lagos State. The physico-chemical and bacteriological parameters were determined using standard methods. Twenty Groundwater samples were selectively collected over a period of 6 weeks from two groundwater stations which were Anchor University and Ayobo community. Groundwater temperature values from both well and borehole ranged from 23.9-27.5°C, with an average value of 24.9°C. Conductivity and TDS had their highest values (99.1μS and 49.3ppm) recorded in well 1 of station 1 while in station 2, the result of the selected physico-chemical water quality parameter revealed that the temperature of groundwater samples ranged from 25.1oC to 26.5oC. pH range from 5.0-7.0 with the highest value (7.0) recorded in sample BOK 1 and BOK 2. Conductivity recorded the highest value of 60.9μS while TDS had the highest value of 63.8ppm. Total mean counts for total viable count, faecal coliforms and total coliforms for Station 1 were as follow: 225.00±7.07CFU/ml, 167.00±4.25CFU/ml and 131per 100ml respectively; and for Station 2: 137.00±1.41CFU/ml, 102.00±1.41CFU/ml and 250 per 100ml respectively, which are all higher than the WHO standard limits. The result of the antibiotics susceptibility profiling revealed that the isolates were resistant to more than three antibiotics. In conclusion, this study showed that borehole water and well water around Ayobo are not safe for direct consumption due to high level of the quality indicator bacteria in them.


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