Her dedication led to a First-Class Honours degree in Microbiology in 1979. A subsequent La Trobe University research scholarship propelled her into the realm of molecular analysis, culminating in a pioneering PhD on the genetic intricacies of plasmid RP1.
Her post-doctoral fellowship at the University of Newcastle-upon-Tyne in 1985 was transformative, marking her as the first to sequence the complete L gene, a vital component in NDV replication. This laid the foundation for her extensive work on NDV, epitope mapping and the molecular biology of local NDV strains.
Beyond virology, Professor Khatijah's research has ventured into understanding virus-cancer cell interactions. NDV's unique proclivity to target human cancer cells has inspired her to explore its potential as an anticancer agent and drug carrier. Her research team pioneers innovative delivery systems using lactic acid bacteria and nanobiotechnology, specifically designed to recognise surface antigens on cancer cells.