UNIVERSITY OF KWAZULU-NATAL OCCUPATIONAL EXPOSURE AND GENOTOXICITY AMONG ETHEKWINI MUNICIPALITY PETROL ATTENDANTS By Dr M H Makwela Student Number: 200267443 A dissertation presented in partial fulfilment of the requirements for the degree of Masters in Medicine: Occupational Medicine School of Nursing and Public Health, College of Health Sciences, University of KwaZulu-Natal Supervisor: Prof R N Naidoo 2013