Personnel

David A. Rosen, MD, PhD

Principal Investigator
Assistant Professor of Pediatrics

David grew up in Michigan where he attended the University of Michigan and double majored in Biochemistry and Hebrew. After completing his undergraduate work in 2002, David traveled west to St. Louis and enrolled in Washington University’s Medical Scientist Training Program. For his doctoral research, David studied urinary tract infection pathogenesis in the lab of Dr. Scott Hultgren. After completing the MD/PhD program in 2010, he joined the Pediatrics Residency Program at St. Louis Children’s Hospital. David fast-tracked into Pediatric Infectious Diseases Fellowship in 2012 and joined the laboratory of Dr. David Hunstad, developing new murine models of Klebsiella pneumoniae pathogenesis. David is now utilizing these models to learn more about Klebsiella virulence in hopes of developing alternative treatments for this increasingly antibiotic resistant organism. In his spare time, David is often found training or racing his bike. He lives in Frontenac with his wife, Diane, and his two children, Marni and Joshua.

rosend@wustl.edu

 

Catherine D. Morffy Smith, PhD

Postdoctoral Fellow

Catherine grew up in Rochester, NY and graduated from Haverford College in 2011 with a major in Biology. Following graduation, she spent three years studying acute myeloid leukemia as a research technician for Dr. Gerald Wertheim at the Children’s Hospital of Philadelphia. In 2014, she moved to Athens, Georgia to begin graduate school at the University of Georgia. Catherine completed her doctoral research in the laboratory of Dr. Julie M. Moore, where she explored the pathogenesis of malaria infection in pregnancy. Following the completion of her PhD, Catherine joined the Rosen lab in 2018. Outside of lab, Catherine enjoys running, camping, and learning to bake new things.

c.d.morffysmith@wustl.edu

Joy Twentyman, BS

Research Technician II

Joy grew up near Seattle, Washington, and graduated from Washington University in St. Louis in 2016, where she double majored in biochemistry and applied mathematics. She joined the Rosen lab in 2016. In her spare time she enjoys running, reading, and participating in collaborative music.

jtwentyman@wustl.edu

Jason Yang, BA

Medical Student

Jason grew up in Shanghai, China, and graduated from Washington University in St. Louis in 2018, where he double majored in biology and chemistry. He worked with Dr. Petra Levin and investigated the factors of bacterial size control as an undergraduate student. Jason is currently a first year medical student at Washington University School of Medicine. He joined the Rosen lab in 2018. In his spare time, Jason enjoys playing basketball.

yangzhizhou@wustl.edu

Lien Zhu

Undergraduate Student Assistant

Lien grew up in Coralville, Iowa, and is currently studying Biology at Washington University in St. Louis as a member of the class of 2022. He joined the Rosen lab in 2019. In his spare time, Lien enjoys playing soccer, ultimate, and basketball and likes to eat.

lienz@wustl.edu

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