Joud Hajjar, MD, PhD, MS, FCIS

Dr. Joud Hajjar is a clinician-scientist who has consistently been recognized for her outstanding contributions to allergy and immunology. She has a robust track record in managing adult patients with inborn errors of immunity (IEI), eosinophilic disorders and mast cell disorders, for which she has received numerous awards.

Beyond her clinical expertise, Dr. Hajjar is a dedicated researcher and educator, and she has received several grant funding and teaching awards. Her approach to patient care is rooted in leveraging cutting-edge research and clinical resources, fostering collaboration and prioritizing the education of future clinicians. She brings this ethos to her active roles in professional organizations. She continually works to advance our understanding of immunological disorders and improve patient outcomes.

Funding

The Jeffrey Modell Foundation

The Chao physician-scientist Award

The Immune deficiency foundation

The US immunodeficiency network

Clinical Interests

Immunodeficiency, immune dysregulation, eosinophilic disorders

Education

Organizations

* Texas Children’s Hospital physicians’ licenses and credentials are reviewed prior to practicing at any of our facilities. Sections titled From the Doctor, Professional Organizations and Publications were provided by the physician’s office and were not verified by Texas Children’s Hospital.

Research interests

The role of gut microbiome in immune dysregulation, improving diagnosis of patients with immunodeficiency, antibody disorders

Hajjar J, Voigt A, Conner M, Swennes A, Fowler S, Calarge C, Mendonca D, Armstrong D, Chang CY, Walter J, Butte M, Savidge T, Oh J, Kheradmand F, Petrosino J. Common Variable Immunodeficiency Patient Fecal Microbiota Transplant Recapitulates Gut Dysbiosis. Res Sq [Preprint]. 2023 Mar 13:rs.3.rs-2640584. doi: 10.21203/rs.3.rs-2640584/v1. PMID: 36993518; PMCID: PMC10055500.

H Syed MN, Kutac C, Miller JM, Marsh R, Sullivan KE, Cunningham-Rundles C, Fuleihan RL, Kheradmand F, Hajjar J. Risk Factors of Pneumonia in Primary Antibody Deficiency Patients Receiving Immunoglobulin Therapy: Data from the US Immunodeficiency Network (USIDNET). J Clin Immunol. 2022 Jul 2. doi: 10.1007/s10875-022-01317-2. Epub ahead of print. PMID: 35779201.

H Le Coz C, Nguyen DN, Su C, Nolan BE, Albrecht AV, Xhani S, Sun D, Demaree B, Pillarisetti P, Khanna C, Wright F, Chen PA, Yoon S, Stiegler AL, Maurer K, Garifallou JP, Rymaszewski A, Kroft SH, Olson TS, Seif AE, Wertheim G, Grant SFA, Vo LT, Puck JM, Sullivan KE, Routes JM, Zakharova V, Shcherbina A, Mukhina A, Rudy NL, Hurst ACE, Atkinson TP, Boggon TJ, Hakonarson H, Abate AR, Hajjar J, Nicholas SK, Lupski JR, Verbsky J, Chinn IK, Gonzalez MV, Wells AD, Marson A, Poon GMK, Romberg N. Constrained chromatin accessibility in PU.1-mutated agammaglobulinemia patients. J Exp Med. 2021 July 5th;218(7):e20201750. doi: 10.1084/jem.20201750. Epub 2021 May 5th. PMID: 33951726; PMCID: PMC8105723.

Perelygina L, Faisthalab R, Abernathy E, Chen MH, Hao L, Bercovitch L, Bayer DK, Noroski LM, Lam MT, Cicalese MP, Al-Herz W, Nanda A, Hajjar J, Vanden Driessche K, Schroven S, Leysen J, Rosenbach M, Peters P, Raedler J, Albert MH, Abraham RS, Rangarjan HG, Buchbinder D, Kobrynski L, Pham-Huy A, Dhossche J, Cunningham Rundles C, Meyer AK, Theos A, Atkinson TP, Musiek A, Adeli M, Derichs U, Walz C, Krüger R, von Bernuth H, Klein C, Icenogle J, Hauck F, Sullivan KE. Rubella Virus Infected Macrophages and Neutrophils Define Patterns of Granulomatous Inflammation in Inborn and Acquired Errors of Immunity. Front Immunol. 2021 Dec 20;12:796065. doi: 10.3389/fimmu.2021.796065. PMID: 35003119; PMCID: PMC8728873.

Joud Hajjar, Nguyen AL, Constantine G, et al. Prophylactic Antibiotics Versus Immunoglobulin Replacement in Specific Antibody Deficiency [published online ahead of print, 2019 November 22nd]. J Clin Immunol. 2019;10.1007/s10875-019-00716-2. doi:10.1007/s10875-019-00716-2

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