David A. Rosen, M.D., Ph.D.  rosend@wustl.edu

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Assistant Professor of Pediatrics
Researcher, Pathobiology
Infectious DiseasesMolecular Microbiology

phone: (314) 454-6050

Research Interests

Dr. Rosen evaluates children on the Infectious Diseases service at St. Louis Children's Hospital. In the research lab, he studies basic pathogenic mechanisms of Klebsiella pneumoniae. This organism often carries sets of genes that render it resistant to most, if not all, antibiotics available. Klebsiella, and other carbapenem-resistant Enterobacteriaceae (CRE), have recently been assigned a threat level of urgent by the CDC. Utilizing mouse models of pneumonia and urinary tract infection, Dr. Rosen dissects mechanisms by which Klebsiella pneumoniae infects the host. Specific interests includes differential regulation of virulence determinants, including type 1 pili and capsule, and adaptive immune responses to Klebsiella in the lung. The ultimate goal is to develop further understanding of Klebsiella pneumoniae pathogenesis, which may reveal alternative therapies to combat these resistant organisms.


  • BS, Highest Distinction and Highest Honors, University of Michigan2002
  • MD, Washington University School of Medicine2010
  • PhD, Washington University School of Medicine2010


  • Pediatric Internship and Residency, St. Louis Children's Hospital2010 - 2012
  • Pediatric Infectious Disease Fellowship, Washington University School of Medicine, St. Louis Children's Hospital2012 - 2016

Licensure and Board Certification

  • 2012 - PresMO, Physician and Surgeon License
  • 2013 - PresGeneral Pediatrics, American Board of Pediatrics
  • 2017 - PresPediatric Infectious Diseases, American Board of Pediatrics

Honors and Awards

  • Farmington Rotary Foundation Daniel Waldman Memorial Scholarship1998
  • State of Michigan House of Representatives Certificate of Recognition1998
  • University of Michigan Regents-Alumni Scholarship1998
  • William Beaumont Hospital Scholarship1998 - 2001
  • University of Michigan James B. Angell Scholar1999 - 2002
  • National Stark Scholarship for Chemistry and Biochemistry2001
  • American Institute of Chemistry Merit Award for Biochemistry2002
  • Washington University Medical School Teaching Assistant of the Year2007
  • Washington University Teaching Citation2008
  • Alexander Berg Prize for Microbiology Research2010
  • St. Louis Children’s Hospital Chief Resident Award2012
  • Pediatric Infectious Diseases Society Fellowship Award2013 - 2015
  • Oliver Langenberg Physician-Scientist Training Program Post-Doctoral Trainee, Washington University School of Medicine2014 - 2017
  • St. Louis Children’s Hospital Outstanding Fellow Teaching Award2015 - 2016
  • Pediatric Infectious Diseases Society Fellow Video Award2015
  • Publons Peer Review Award, Top 1% in Microbiology2018
  • St. Jude/PIDS Pediatric Infectious Diseases Research Conference Poster Award2019
  • American Association of Immunology Early Career Travel Award2020

Selected Publications view all (12)

Publication Co-Authors

High levels of cyclic di-GMP in Klebsiella pneumoniae attenuate virulence in the lung. Infect Immun. 2018;86(2). PMCID:PMC5778367  PMID:29158434 
Klebsiella pneumoniae FimK promotes virulence in murine pneumonia. J Infect Dis. 2016;213(4):649-58. PMCID:PMC4721909  PMID:26347570 
Utilization of an intracellular bacterial community pathway in Klebsiella pneumoniae urinary tract infection and the effects of FimK on type 1 pilus expression. Infect Immun. 2008;76(7):3337-45. PMCID:PMC2446714  PMID:18411285 
Detection of intracellular bacterial communities in human urinary tract infection. PLoS Med. 2007;4(12):e329. PMCID:PMC2140087  PMID:18092884 
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