Molecular Parasitology Section

The Grigg lab investigates the emergence and pathogenesis of prevalent zoonoses, specializing in protozoan parasites and viruses that infect a broad spectrum of animal and human hosts. We perform biochemical, population, immunologic, and molecular genetic analyses, using both forward, reverse genetics and GWAS studies, to identify virulence genes that control pathogenesis and perturb immune system homeostasis in animal models of natural infections. Ultimately our work is discovering protozoan and viral genes for vaccine design, that actively regulate host immunity, alter host metabolism, and promote microbial pathogenesis.

Michael Grigg, Ph.D.

Chief, Molecular Parasitology Section

Contact: griggm@niaid.nih.gov

Education:

Ph.D., 1994, Imperial College of Science, Technology, and Medicine, University of London

B.Sc., 1989, University of British Columbia

Dr. Grigg obtained his Ph.D. and D.I.C. in 1994 from the Imperial College of Science, Technology, and Medicine, University of London. Dr. Grigg was an HHMI Senior Fellow at the University of Washington from 1994-1997, then a Postdoctoral Scholar in Molecular Parasitology at Stanford University from 1997-2001. In 2002 he became a tenure-track Assistant Professor in Medicine, Microbiology, and Immunology at the University of British Columbia before joining the Laboratory of Parasitic Diseases, NIAID, National Institutes of Health in 2007 where he is a Senior Investigator. In 2018 he was elected an American Academy of Microbiology Fellow.

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Michael E. Grigg, Ph.D.

Aline Sardinha-Silva, Ph.D.

Staff Scientist

Education:

Ph.D., Immunology, University of Sao Paulo, Brazil

M.Sc., Immunology, University of Sao Paulo, Brazil

B.Sc., Biology, State University of Northern Parana, Brazil

Languages Spoken: Portuguese

Aline investigates Toxoplasma gondii genes involved in parasite sexual development and transmission, as well as surface antigens that modulate host immunity to promote persistence in mammalian hosts. In parallel, she studies the biochemical, molecular, and cellular mechanisms underlying disease attenuation during Giardia infection, with a focus on Giardia-induced type 2 immunity. Aline is also developing transmission-blocking vaccine strategies against Toxoplasma, including live-attenuated and virus-like particles (VLP) platforms, and exploring how protozoan antigens can function as adjuvants to prime protective immune responses.

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Fadila Bouamr, Ph.D.

Staff Scientist

Education:

Ph.D. Virology, Victor Segalen Bordeaux University, France

M.Sc. Molecular Biology and Health

B.Sc. Molecular Biology and Biochemistry

Languages Spoken: French, Arabic

Fadila leads research projects focused on uncovering the molecular strategies human viruses use to hijack host cellular machinery, enabling efficient replication and evasion of immune responses. This work is driven by several key questions: (1) How does several host enzymes, including the innate immune factor TRIM5 restrict tick-borne flaviviruses? (2) Does TRIM5 function as a restriction factor targeting incoming HIV-1 cores at nuclear pores (NUPs)? (3) Which determinants within the SARS-CoV-2 Spike protein govern rapid viral entry and facilitate stealth transmission in vivo? (4) How virus-like particle (VLP) or nanovector-based vaccines can be engineered to efficiently deliver antigens to mucosal surfaces.

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Fadila Bouamr, Ph.D.

Beth Gregg, Ph.D.

Biologist

Education:

Ph.D., Cell and Molecular Biology, University of Pennsylvania 

B.S., Loyola University Maryland

Beth investigates the biology and pathogenesis of apicomplexan parasites, with a focus on Toxoplasma gondii and Neospora caninum. Using cell and molecular biology approaches, she identifies and characterizes parasite virulence determinants that modulate host cell function and immune responses. Of particular interest is defining parasite proteins that impact innate immune mechanisms, such as...

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Eliza V. C. Alves-Ferreira, Ph.D.

Research Fellow

Education:

Ph.D., Molecular and Cell Biology, University of Sao Paulo, Brazil 

M.Sc., Molecular and Cell Biology, University of Sao Paulo, Brazil

B.Sc., Biology, Federal University of Maranhao, Brazil

Languages Spoken: Portuguese

Eliza has dedicated over ten years to studying tropical infectious diseases and host-microbe interactions with expertise in Molecular Biology, Cell Biology, Parasitology, Genetics and Microbiota. Currently, she's focused on two main projects: 1) Investigate the genetics of parasites such as Cryptosporidium, Leishmania, and Trichomonas, conducting in-depth investigations into their genetic...

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Rahul Singh Rawat, Ph.D.

Postdoctoral Visiting Fellow

Education:

Ph.D., Life Sciences, National Institute of Immunology, India

M.Sc., Biotechnology, University of Hyderabad, India

B.Sc., Zoology, University of Delhi, India

Languages Spoken: Hindi

Rahul has done his Ph.D. in the field of Life Sciences from National Institute of Immunology, New Delhi, India. He worked on the role of secondary messenger signaling pathways in the development of P. falciparum and T. gondii. Currently, he is investigating the role of host E3 ubiquitin ligases in the defense against various disease-causing pathogens with a special interest towards Toxoplasma and...

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Mabel D. Tettey, Ph.D.

Postdoctoral Visiting Fellow

Education:

Ph.D., University of Edinburgh, Scotland

B.Sc., Biological Sciences, Kwame Nkrumah University of Science and Technology, Ghana

Mabel’s research is focused on the genetic population of African trypanosomes. She is particularly interested in understanding how hybridisation events within trypanosome populations contribute to the emergence of new virulent strains and their impact on disease epidemiology.

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Stephanie Spada, B.S.

Predoctoral Fellow

Education:

Ph.D. candidate, University of Oxford, UK 

B.S., Cell and Molecular Biology, University of Rhode Island, USA

Stephanie is an NIH-Oxford scholar interested in the intrinsic cellular barriers to viral infection. Her current work leverages the power of cryo-electron microscopy (cryo-EM) and correlative approaches in cryo-electron tomography (cryo-ET) to characterize novel restrictive functions of TRIM5α against orthoflaviviruses. By elucidating the structural intricacies of TRIM5α, Stephanie aims to...

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Andrea Paun, Ph.D.

Senior Research Associate

Education:

Ph.D., University of Western Australia

B.Sc. (Hons), University of Western Australia

Languages Spoken: German

Andrea’s current research is focused on the genetics of Leishmania, particularly in clinical samples, through the development of molecular assays for diagnostic speciation. She is also interested in host-vector-pathogen interactions in leishmaniasis and how this relates to disease outcomes for patients.

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Sabikun Orpita, B.A.

Post-baccalaureate IRTA

Education:

B.A., Colgate University

Sabikun uses molecular genetic techniques to study the parasites Neospora caninum, Tritrichomonas, and Leishmania. She uses PCR- Taqman- and Sequence-based detection strategies to genotype Neospora caninum in tissue samples, distinguish among different species of rodent Tritrichomonas parasites, and NMAS-Seq approaches to genotype different strains of Leishmania causing human infection. Through...

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Former Research Group Members

  • Spencer Magargal, Post-Baccalaureate IRTA, 2007-2008
  • Sundar Natarajan, Research Fellow, 2007-2013
  • Chloe Gottlieb, VF-IRTA, 2008-2010
  • Erika Lamb (Davies), IRTA, 2008-2010
  • Robin Miller, Post-Baccalaureate IRTA, 2008-2010
  • James Wasmuth, VF-IRTA 2008-2010
  • Amanda Gibson, Post-Baccalaureate IRTA, 2009-2010
  • Jered Wendte, OSU M.Sc. Student, 2009-2011
  • Alexandra Gast, Post-Baccalaureate IRTA, 2010-2011
  • Wendy Fujita, Post-Baccalaureate IRTA, 2010-2011
  • Gezahegn Gorfu, Research Fellow, 2010-2013
  • Alessandra Commodaro, VF-IRTA, 2010-2014
  • Lorraine Thompson, UC Davis M.Sc. Student, 2011-2012
  • Melissa Chiasson, Post-Baccalaureate IRTA, 2011-2013
  • Mourad Barhoumi, VF-IRTA, 2011-2013
  • Stefano Iantorno, OxCam Ph.D. Student, 2011-2015
  • Leeanne Goodrich, Post-Baccalaureate IRTA, 2012-2013
  • Katie Haman, IRTA/UBC Ph.D, 2012-2016
  • Livia Martins, VF-IRTA, 2013-2014
  • Amy Sween, Post-Baccalaureate IRTA, 2013-2015
  • Dionne Robinson, INRO Post-Doctoral, 2013-2017
  • Asis Khan, Staff Scientist, 2013-2020
  • Viviana Pszenny, Contract Biologist, 2013-2025
  • Malavika Rajeev, Post-Baccalaureate IRTA, 2014-2015
  • Juan David Ramirez, PEW Latin America, 2014-2017
  • Trent Gray, NIH Academy IRTA, 2014-2016
  • Cristina Carvalheiro, Clinical Fellow, 2015-2017
  • Ari Azani, Post-Baccalaureate IRTA, 2015-2016
  • Andrea Kennard, Pre-Doctoral IRTA, 2015-2018
  • Patricia Sikorski, Pre-Doctoral IRTA, 2015-2020
  • Gloria Adedoyin, NIH Academy IRTA, 2016-2017
  • Launick Saint-Fort, NIH Academy IRTA, 2016-2017
  • Jahangheer Shaik, Staff Scientist, Core, 2016-2019
  • Alexander Downie, Post-Baccalaureate IRTA, 2017-2018
  • Katherine J. Yanes, Post-Baccalaureate IRTA, 2017-2019
  • Grant Stevens, Special Volunteer, 2018-2018
  • Natalia T. Grube, Post-Baccalaureate IRTA, 2018-2019
  • Elizabeth Zhang, Post-Baccalaureate IRTA, 2018-2020
  • Yang Chen, Post-Baccalaureate IRTA, 2019-2022
  • Christina Shehata, Post-Baccalaureate IRTA, 2019-2020
  • Erick Tjhin, VF-IRTA, 2020-2023
  • LeilaTuzlak, NIH Academy IRTA, 2020-2022
  • Fumiaki Ihara, JSPH Visiting Fellow, 2020-2022
  • Dominique Stewart, Post-Baccalaureate IRTA, 2021-2022
  • Chinwe Chukwudi, APTI fellow, 2021-2023
  • Ajakaya Grace, APTI fellow, 2021-2023
  • Kevin Rose, Post-Baccalaureate IRTA, 2021-2023
  • Tammy Chen, Pre-Doctoral IRTA (MSc), 2021-2023
  • Vy (Ava) Nguyen, Post-Baccalaureate IRTA, 2022-2023
  • Christina Chung, Post-Baccalaureate IRTA, 2022-2023
  • Bereket Girma, Contractor, 2022-2023
  • Anastasia Coutlakis, Post-Baccalaureate IRTA, 2023-2024
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