Dr Karyn Johnson

Senior Lecturer

School of Biological Sciences
Faculty of Science
karynj@uq.edu.au
+61 7 336 51358

Overview

Invertebrate Virology

Insects are commonly infected with viruses. We study the interactions between viruses and their insect or arthropod hosts.

Viruses are obligate parasites, that is, they are completely dependent on the host cell machinery to complete their replication cycle. During infection, viruses commonly cause pathology in the host. For these reasons, viruses and hosts are in a constant evolutionary arms race. The host evolves antiviral mechanisms to prevent virus infection, while the virus adapts to overcome these host responses. Insects are ideal hosts to understand both the host response and the virus mechanisms for controlling the host.

My research group investigates the interactions between viruses and insects, primarily using Drosophila as a model. In this model we can control the genetics of both the host and the virus to tease apart the contribution of each partner to the interaction.

We discovered that a bacterium, Wolbachia, mediated antiviral protection in insects. We have several projects investigating both the mechanisms that protect the insects from virus infection and the impact of this protection on virus transmission.

Research Impacts

Understanding how insects respond to infection with viruses is important to develop strategies to control the spread of virus induced disease.

Qualifications

  • BSc, Australian National University
  • Doctor of Philosophy, Australian National University

Publications

View all Publications

Supervision

  • Doctor Philosophy

  • Doctor Philosophy

  • Doctor Philosophy

View all Supervision

Publications

Featured Publications

Book Chapter

  • Bonning, Bryony C. and Johnson, Karyn N. (2010). Dicistroviruses. In Sussan Asgari and Karyn N. Johnson (Ed.), Insect Virology (pp. 197-229) Norfolk, United Kingdom: Caister Academic Press.

  • Van Hulten, M., Johnson, K.N. and Barnes, A.C. (2009). Development of vaccines and management of viral diseases. In Sandra Shumway and Gary E. Rodrick (Ed.), Shellfish Safety and Quality 1st ed. (pp. 359-383) United Kingdom: Woodhead Publishing Limited.

  • Christian, P. D., Carstens, E. B., Domier, L., Johnson, J., Johnson, K. N., Nakashima, N., Scotti, P. D. and van der Wilk, F. (2005). Dicistroviridae in virus taxonomy. In Fauquet, C. M., Mayo, M. A., Maniloff, J., Desselberger, U. and Ball, L. A. (Ed.), Virus taxonomy : the eighth report of the International Committee on taxonomy viruses (pp. 678-683) San Diego: Academic Press (Elsevier Press).

  • Christian, P. D., Carstens, E. B., Domier, L., Johnson, J., Johnson, K. N., Nakashima, N., Scotti, P. D. and van der Wilk, F. (2005). Iflavirus in Virus Taxonomy. In Fauquet, C. M., Mayo, M. A., Maniloff, J., Desselberger, U. and Ball, L. A. (Ed.), Virus taxonomy: Classification and nomenclature of viruses : Eighth report of the International Committee on the Taxonomy of Viruses (pp. 678-683) San Diego: Elsevier Academic press.

Journal Article

Conference Publication

  • Vitak, N., Johnson, K. N., Hume, D. A., Sester, D. P. and Stacey, K. J. (2016). Evolution of cell death responses to cytosolic DNA. In: ICI 2016 International Congress of Immunology, Melbourne, Australia, (494). 21-26 August 2016. doi:10.1002/eji.201670200

  • Ridley, A. W., Walter, G. H., Croft, B. J. and Johnson, K. N. (2006). Acquisition of Fiji disease virus from sugarcane by its insect vector. In: D. M. Hogarth, Proceedings of the 2006 Conference of the Australian Society of Sugar Cane Technologists. 28th Annual Conference of the Australian Society of Sugar Cane Technologists, Mackay, Queensland, Australia, (602-602). 2-5 May 2006.

  • Hughes, G. L., Allsopp, P. G., Brumbley, S. M, Johnson, K. N. and O'Neill, S. L. (2006). Identification, culturing and transformation of yeast-like symbionts of the planthopper, Perkinsiella saccharicida. In: 5th International Society of Symbiosis conference, University of Vienna, Vienna, Austria, (). 4-10 August, 2006.

PhD and MPhil Supervision

Current Supervision

  • Doctor Philosophy — Principal Advisor

    Other advisors:

  • Doctor Philosophy — Principal Advisor

  • Doctor Philosophy — Principal Advisor

  • Doctor Philosophy — Associate Advisor

    Other advisors:

  • Doctor Philosophy — Associate Advisor

    Other advisors:

Completed Supervision