Dr. Petros Karakousis is a Professor of Medicine at the Johns Hopkins University School of Medicine. He has a joint appointment in International Health at the Johns Hopkins Bloomberg School of Public Health. 


He graduated summa cum laude from the Johns Hopkins University in 1994 and received a Distinguished Alumni Scholarship to study at the Washington University School of Medicine in St. Louis, where he was inducted into the Alpha Omega Alpha Honor Society in 1998. He completed residency training in Internal Medicine in 2001 at the Hospital of the University of Pennsylvania. After completing fellowship training in Infectious Diseases at Johns Hopkins University School of Medicine, he joined the Department of Medicine faculty in 2005.

Professor of Medicine

Petros C. Karakousis, M.D.



I obtained my Ph.D. from Jadavpur University, India, and did postdoctoral research at Seoul National University, South Korea and Tulane University, USA. I am presently working on multiple projects, including a systems biology-based characterization of animal models of latent TB infection and reactivation, and testing the efficacy of novel drugs and drug combinations in murine and guinea pig TB models.

Hobbies: Traveling, reading, and cooking.

Research Associate

Noton K. Dutta, Ph.D.


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I obtained my medical degree from the University of Ghana Medical School in February 2012. After two years of internship, I served for 3 years as a general practitioner. In May 2019, I obtained a Masters in Public Health from The Johns Hopkins Bloomberg School of Public Health with a major in Epidemiology and Biostatistical Methods for Public Health and Clinical Research.

Research Interest: Molecular mechanisms underlying chronic infectious diseases (particularly TB and HIV), and drug development for TB/HIV.

Hobbies: Soccer, Table tennis.

Post-Doctoral Fellow

Samuel Ayeh, MD, MPH


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I earned my Masters Degree from Johns Hopkins University in Computer Science, after first completing my Bachelors in Electrical Engineering from the University of Maryland, College Park. My work in the lab focuses on applying bioinformatics techniques, such as RNAseq, against high volumes of sample data to extrapolate meaningful results and expand our knowledge of M. tuberculosis and M. avium. Outside of the lab, I work in computer security to analyze and protect against malware threats.

Hobbies: Playing guitar, composing, and trying new food.

Post-Masters Fellow

Robert L. Jenquin, M.S.


I am a master's student at Johns Hopkins University, currently studying MS in Biotechnology. I received my Bachelor of Technology degree in Biotechnology from Vellore Institute of Technology, India. I am interested in understanding the molecular mechanisms behind the persistence and the drug resistance of M. avium and M. tuberculosis.



Hobbies: Running, Swimming, Reading and Volunteering.

M.S. Student in Biotechnology

Aakanksha Kapoor, B.Tech.


I received my Bachelor of Science degree in Biochemistry from Youngstown State University in 2018. I am now pursuing a Ph.D. in the Pathobiology program at Johns Hopkins School of Medicine and will be conducting my thesis work in the Karakousis lab. My current research focuses on identifying potential drug-targetable genes in Mycobacterium tuberculosis to improve treatment times.


Hobbies: Baking, Reading, and Skiing

Ph.D. Student in Pathobiology

Harley Parker, B.S.


I received my Bachelor of Science degrees in Microbiology and Psychology from the University of Maryland, College Park in 2016. I am currently a PhD candidate in the Pathobiology program at the Johns Hopkins School of Medicine, conducting my thesis work in the Karakousis Lab. My research focuses on furthering our understanding of host responses to infection withMycobacterium tuberculosis. Current projects are aimed at defining the functional roles of microRNAs, tRNA-derived fragments, and the inflammasome in tuberculosis pathogenesis and treatment using both unbiased, high-throughput and targeted, mechanistic approaches. The ultimate goal of this work is to identify novel targets for host-directed therapy development. 

Current project: Investigating the role of microRNAs in tuberculosis pathogenesis and treatment.

Hobbies: Painting, Mountain Biking, Traveling, Volunteering

Ph.D. Student in Pathobiology

Monika Looney, B.S.



I am a sophomore at Johns Hopkins University studying chemistry and molecular and cellular biology. I am interested the molecular mechanics behind why the HIV+ population is significantly more susceptible to tuberculosis disease and understanding the host-pathogen interaction in Mtb infection. Outside of lab, I am the president of JHU Triathlon Club and am an EMT for the Hopkins Emergency Response Organization.

B.S. Student in Chemistry/Molecular and Cellular BIology

Rachel Lorenc


I am a sophomore at Johns Hopkins. I am currently studying molecular and cellular biology and public health. My academic interests include infectious diseases and epidemics, particularly tuberculosis, both on a molecular and cellular level and a population level. I am also interested in the challenges to providing health care to rural areas and to populations who typically do not have access. My other interests include cooking, skiing, and traveling. I am also involved with the club softball team and am an EMT.

B.S. Student in Molecular and Cellular Biology

Sarah Kohl


I am a sophomore at Johns Hopkins University studying Molecular and Cellular Biology and Computational Medicine. I am interested in understanding the pathogenesis of tuberculosis infection and the mechanisms by which our immune system defends against it. I am also interested in learning about host-directed therapies for TB. My other hobbies include cooking, grocery shopping, journaling, and travelling.

B.S. Student in Molecular and Cellular Biology

Olivia Wang


Linda Brady

Geltrouda Demczuk

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Artwork by Monika Looney - Inquiries welcome