Dr. Sullivan obtained his Ph.D. in Cell & Molecular Biology from the University of Pennsylvania in 1997. His graduate work, performed in the lab of Dr. David Roos, focused on using novel genetics tools to probe mechanisms of drug resistance in Toxoplasma. After a two year postdoc at Eli Lilly & Co, he became an Assistant Scientist under the mentorship of Dr. Sherry Queener at the Indiana University School of Medicine (IUSM) to examine gene regulation in Toxoplasma. He is currently Showalter Professor at IUSM in the Department of Pharmacology & Toxicology and the Department of Microbiology & Immunology. Dr. Sullivan is also co-founder and writer for THE 'SCOPE (highlighting the science in pop culture), editor/writer at PLOS SciComm, and serves on the Editorial Board of mSphere.


Email. Twitter. LinkedIN. Faculty homepage.


Dr. Michael Holmes obtained his Ph.D. in Biochemistry from the University of Windsor in 2015.  His graduate work, performed in the laboratory of Dr. Sirinart Ananvoranich, focused on the study of developmentally regulated transcript-specific translational repression in Toxoplasma gondii bradyzoites. Mike joined the Sullivan lab in July, 2015 and is working on understanding how changes in translational control relate to the tachyzoite - bradyzoite interconversion process.



Leonardo da Silva Augusto, Ph.D.:  POSTDOCTORAL FELLOW


Leo completed his Ph.D. in the laboratory of Dr. Sergio Schenkman (Federal University of Sao Paulo - UNIFESP), where he investigated mechanisms of translational control in Trypanosoma cruzi. He joined the Sullivan Lab July 2016 to study translational control in Toxoplasma.


Sandeep Srivastava, Ph.D.: POSTDOCTORAL FELLOW


Dr. Sandeep Srivastava obtained his Ph.D. in Molecular Medicine from Jawaharlal Nehru University, New Delhi, India. His graduate work was performed in the laboratory of Professor Suman Kumar Dhar, focused on biochemical and functional analysis of Silent Information Regulator protein (SIR2) in Plasmodium falciparum. In 2014, he joined the laboratory of Professor Mark Featherstone at Nanyang Technological University, Singapore to investigate AP2 transcription factors in the malaria parasite. Dr. Srivastava joined the Sullivan lab in March 2017 and is analysing the function of AP2 transcription factors in Toxoplasma.




Vishakha received her PhD in Molecular Parasitology under the supervision of Prof. Swati Patankar from IIT Bombay, India. Her doctoral studies revolved around understanding nuclear trafficking in Plasmodium falciparum. She joined the Sullivan Lab in March 2020 and is studying the role of GCN5 lysine acetyltransferase complexes in Toxoplasma.




Jocelyne Hanquier:  M.S. GRADUATE STUDENT

Jocelyne obtained her B.S. in Biology from Marian University in the spring of 2017. While at Marian, she investigated therapeutic properties of soil bacteria. Jocelyne joined the Sullivan Lab in the summer of 2017 and will start work on her MS degree this fall in the Department of Microbiology & Immunology. Jocelyne is studying chromatin reader proteins in Toxoplasma.


Calvin Kosso

Lab alumni


Victoria Jeffers, Ph.D. (Postdoctoral fellow 11/2010-12/2015; Assistant Research Professor 1/2016-12/2018)  

Michael Harris, Ph.D. (Postdoctoral fellow 3/2015-7/2018)

Min Zhang, Ph.D. (Assistant Research Professor, 1/2017-3/2018)

Imaan Benmerzouga, Ph.D. (Postdoctoral fellow 1/2014-7/2015)

Anne Bouchut, Ph.D.(Postdoctoral fellow 3/2013-10/2014)

Tingkai Kevin Liu, Ph.D. (Postdoctoral fellow 3/2011-9/2013)

Christian Konrad, Ph.D. (Postdoctoral fellow 8/2009-7/2013)

Bradley Joyce, Ph.D. (Postdoctoral fellow 8/2007-4/2013)

Vanina Elias, Ph.D. (Postdoctoral fellow 2/2009-8/2010)

Arunasalam Naguleswaran (Nagul), Ph.D. (Postdoctoral fellow 4/2006-8/2010)

Nathalie Vonlaufen, Ph.D. (Postdoctoral fellow 3/2007-2/2008)

Jana Narasimhan, Ph.D. (Postdoctoral fellow 8/2004-7/2006)



Jennifer Martynowicz (MD/PhD 6/2016 - 12/2019)

Jocelyne Hanquier (MS 6/2017 - 11/2019

Joe Varberg (PhD 6/2013 - 6/2017)

Leah Padgett (PhD 6/2013 - 6/2017)

Sherri Huang (MD/PhD 6/2013 - 12/2016)

Krista Stilger (PhD 6/2009 - 10/2013)

Jiachen Wang (MS 6/2010 - 5/2013)

David O. Onyango (PhD 6/2007-1/2011)

Stacy E. Dixon (MD/PhD 6/2006-6/2010)

Micah M. Bhatti (MD/PhD 6/2002-5/2005)

Karuna Nallani Tirumala (MS 8/2002-7/2004)

Aaron T. Smith (MS 9/2003-9/2005)

Apryl Underwood (MS/MS Spring 2005)

Christina Bennett (MS/MS Spring 2005)

Kelli Bramlett (MS 9/2003-7/2006)



Sarah Abney (Research Technician 3/2008-12/2011)

Aaron T. Smith, MS (Research Technician 9/2005-2/2008)

Meredith Livingston, MS (Research Analyst 4/2004-8/2007)



Diego Ruiz, PhD (Dr. Sergio Angel, 2019)

Valeria Turowski, PhD (Dr. Sergio Angel, 2019)

Thomas Gimeno (STEM student, summer 2018)

Nic Wheeler (undergraduate honors student, summer 2012)

Silvina Bogado (Dr. Sergio Angel, summer 2011 and 2013)

Krista Podell (summer undergrad MURF student, Univ Indianapolis, 2010)

Kaitlin Flynn (summer undergrad, Earlham, 2009)

Carolina Dalmasso (Dr. Sergio Angel, summer 2007, 2008)



Tiffany Novak (2017-2018)

Gian Gballou (2016)

Eunice Jeong (2012)

Ariel Auerbach (2011)

Candice Childs (2011)

Nis Jose (2010)

Kristin Geros (2010)

Dillon Etter (Summer 2009)

Angie Pierle (Spring 2009)

Wendy Cowles (Spring/Summer/Fall 2008)

Jennifer Martynowicz:  M.D./Ph.D. GRADUATE STUDENT


Jen joined the Sullivan Lab in July, 2016 and is investigating therapeutics that target translational control in Toxoplasma. Jen is co-sponsored by the Joseph and Lucille Madri Scholarship and is supported on the NIH Immunology and Infectious Disease Training Grant. Jen received her BS from Notre Dame prior to joining the MSTP program at IUSM.



© 2023 by by James Consulting. Proudly created with

This site was designed with the
website builder. Create your website today.
Start Now