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Adeline Hajjar

Adeline Hajjar
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Department Research Institute Office
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon No


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About Adeline Hajjar

Adeline (Lynn) Hajjar, DVM, PhD, is Director of the Gnotobiotics Facility in the Center for Microbiome and Human Health at the Lerner Research Institute. She is also Associate Staff in the Department of Cardiovascular and Metabolic Sciences and Associate Professor of Molecular Medicine in the Cleveland Clinic Lerner College of Medicine.

Dr Hajjar earned her DVM from the University of Illinois, Urbana, and her PhD from the Department of Microbiology at the University of Washington, Seattle. She remained at the University of Washington for postdoctoral training in the Department of Immunology and established an independent laboratory in 2009 in the Department of Comparative Medicine. She also helped establish and then became the director of the gnotobiotics core at the University of Washington, before joining the Cleveland Clinic in 2018. Dr Hajjar has over 20 years of research experience concentrating in areas of Toll-like receptor biology and inflammatory responses as well as mouse models of infection, including Pseudomonas aeruginosaSalmonella enterica serovar Typhimurium, Yersinia pestis, and Bordetella pertussis, with a particular interest in overcoming mouse-human differences in innate immunity by creation of humanized mouse models. In addition to her service duties, she currently maintains a small research laboratory investigating the role of the microbiome in cystic fibrosis.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Graduate School - University of Washington
Seattle, WA USA

Residency - University of Washington
Seattle, WA USA

Undergraduate - University of Illinois
Urbana, IL USA

Graduate School - University of Illinois
Chicago, IL USA

Research & Publications

Research & Publications

See publications for Adeline Hajjar.

(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)

Industry Relationships

Industry Relationships

Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.

To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.

As of 1/21/2022, Dr. Hajjar has reported the financial relationships with the companies listed below. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.

Royalty Payments. Dr. Hajjar receives or has the right to receive royalty payments for inventions or discoveries commercialized through the companies shown below:

  • University of Washington

Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.

* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.

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