Human primary immunodeficiencies causing defects in innate immunityWong, Tiffany; Yeung, Joanne; Hildebrand, Kyla J.; Junker, Anne K.; Turvey, Stuart E.Current Opinion in Allergy and Clinical Immunology: December 2013 - Volume 13 - Issue 6 - p 607–613 doi: 10.1097/ACI.0000000000000010 PRIMARY IMMUNE DEFICIENCY DISEASE: Edited by Ramsay L. Fuleihan and Bruce D. Mazer Abstract Author Information Purpose of review There have been exciting recent advances in identifying new mutations that cause human primary immunodeficiencies which impact innate immune defences. In this review, we will highlight the most important and influential advances published in the last 18 months related to the defects of the innate immune system. We will also provide clinical context to facilitate the incorporation of these discoveries into clinical practice. Recent findings We will specifically focus on three areas that have seen recent significant advances: defects in Toll-like receptor signalling that enhance susceptibility to viral infection, particularly herpes simplex encephalitis; defects in innate immunity that impact phagocyte function predisposing to mycobacterial infection; and the discovery of genes responsible for isolated congenital asplenia. Summary The field of innate immunodeficiency has benefited greatly from the recent improvements in genome sequencing technology and has advanced dramatically in the last 18 months. For clinicians confronted with patients with suspected innate immunodeficiency, these new discoveries not only increase the likelihood that a patient will receive a specific molecular diagnosis and tailored therapy, but also add significant complexity to the diagnostic workup. Future challenges will include identifying accurate, cost-effective diagnostic approaches to these novel immunodeficiencies, so these impressive advances in our understanding of innate immunity can be translated into improved health outcomes for our affected patients and their families. Department of Pediatrics, Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia, Canada Correspondence to Stuart E. Turvey, MBBS, DPhil, FRCPC, Child & Family Research Institute, 950 West 28th Avenue, Vancouver, BC, Canada V5Z 4H4. Tel: +1 604 875 2345 x5094; e-mail: email@example.com Copyright © 2013 Wolters Kluwer Health, Inc. All rights reserved.