ANTIBIOTIC RESISTANCE OF COLIFORM BACTERIA IN THE RIETSPRUIT RIVER GRACE NKECHINYERE IJOMA 207053456 Dissertation submitted in fulfilment of the requirements for the degree of Magister Technologiae: Biotechnology Department of Biosciences Faculty of Applied and Computer Sciences Vaal University of Technology Vanderbijlpark Supervisor: Mrs. CS van Wyk Co-Supervisor: Dr. HA Esterhuysen September 2010