Received: 17 May 2019
Accepted: 30 July 2019
First Online: 9 August 2019
Ethics approval and consent to participate
: The proposal was approved by the Research and Ethics Committee of the Department of Microbial, Cellular & Molecular Biology, College of Natural Sciences, Addis Ababa University. Permission to collect water samples was obtained from the administration of Hospitals, Abattoir and wastewater treatment plant.
: Not applicable
: The authors declare that they have no competing interests.