About Us

The Australian Rickettsial Reference Laboratory (ARRL) was formed in 1996 and currently operates within Barwon Biomedical Research an operating arm of the Geelong Hospital in the Barwon Health care system. The ARRL provides a diagnostic service for rickettsial diseases including Q fever and more recently COVID19. See below, some members of our hard-working team.

Medical Director

Prof Stephen Graves

Research Director

Prof John Stenos

Medical Scientist

Ms Chelsea Nguyen

Medical Scientist

Dr Hazizul Hussain

Medical Scientist

Dr Mythili Tadepalli

Medical Scientist

Dr Gemma Vincent

Medical Scientist

Ms Denise Airey

Medical Scientist

Ms Michelle Long


Accounts Payable

Ms Ariane Nguyen



Ms Adriana Stenos