Retroviral Biology and Antivirals Group

Head: Professor Gilda Tachedjian


Our overall goal is to identify and develop effective antiviral strategies to prevent and control pathogens, including HIV.

We achieve this through discovering, developing and elucidating the mechanism of action of novel antivirals for HIV treatment and prevention, and by understanding the role of the genital microbiota and their metabolites on adverse sexual (e.g. HIV) and reproductive health outcomes.

We undertake fundamental studies to understand the biology of viruses and their interaction with host restriction factors.


  • Elucidate the role of the vaginal microbiota and their metabolites in adverse sexual (i.e. HIV) and reproductive health outcomes
  • Develop a new drug class for HIV treatment and prevention
  • Understand virus-host interactions


  • Discovery of a vaginal microbiota metabolite with anti-inflammatory effects on cervicovaginal epithelial cells that could help prevent HIV
  • Discovered that bats encode a diverse number of APOBEC3 genes, a major class of intrinsic antiviral genes
  • Discovery of small chemical building blocks (fragments) with mechanism of action distinct to HIV reverse transcriptase inhibitors used in the clinic
  • Discovery of a vaginal microbiota metabolite, lactic acid, that is more potent than acidity alone in killing HIV
  • Identification and characterisation of endogenous retroviruses in bats
  • Structure-activity relationship studies of dendrimer microbicides against HIV and genital herpes revealing that the dendrimer SPL7013 is the most potent against both viruses
  • Successful completion of a phase I dendrimer microbicide, SPL7013 Gel (VivaGel) clinical trial in healthy women demonstrating retention of HIV-1 and HSV-2 inhibitory activity.
  • Discovery of a novel mutation, N348I in the C-terminal domain of the HIV reverse transcriptase which confers resistance to zidovudine and nevirapine
  • Demonstration that potent members of a class of HIV-1 drugs called non-nucleoside reverse transcriptase inhibitors block the production of viral particles by increasing the processing of viral polyproteins inside the host cell


  • A novel gel for targeting vaginal inflammation to prevent HIV transmission

  • Antimicrobial and immune modulatory effects of vaginal microbiota metabolites

  • Bat viruses and antiviral immunity❗PhD Projects Available

  • Burnet Microbiome Initiative

  • Characterisation of retroviruses in bats

  • Development of hydrogel based intravaginal drug delivery device

  • EVE-M

  • Impact of a vaginal microbiota metabolite on epithelium integrity and HIV susceptibility

  • Intrinsic host antiviral activity against pathogenic viruses

  • Targeting novel sites on reverse transcriptase for HIV treatment and prevention

Staff Members

  • Brianna  Jesaveluk

    Brianna Jesaveluk
    PhD Student; 2022 Student Representative

  • Callum Diamond-Smith

    Callum Diamond-Smith
    Honours Student

  • Doctor Celine Deffrasnes

    Doctor Celine Deffrasnes
    Senior Research Officer

  • David Tyssen

    David Tyssen
    Research Officer, Tachedjian Laboratory (Retroviral Biology and Antivirals)

  • David  Delgado Diaz

    David Delgado Diaz
    PhD Student

  • Professor Gilda Tachedjian

    Professor Gilda Tachedjian
    Head of Life Sciences; Head of Tachedjian Laboratory (Retroviral Biology and Antivirals)

  • Doctor Joshua Hayward

    Doctor Joshua Hayward
    Senior Research Officer

  • Lara Griffin

    Lara Griffin
    Honours Student

  • Doctor Paula Ellenberg

    Doctor Paula Ellenberg
    Laboratory Manager

  • Tamsin  Gordon

    Tamsin Gordon
    PhD Student