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John F. Bohnsack, M.D.

Vice-Chair of Clinical Enterprise, Department of Pediatrics

Chief, Division of Pediatric Immunology and Rheumatology



  • English

Clinical Details


Schedule An Appointment Clinical Office Address
(801) 213-3599 PCH Outpatient Services at Riverton
3773 West 12600 South
Riverton, UT 84065
(801) 213-3599 Primary Children's Hospital
100 N Mario Capecchi Drive
Salt Lake City, UT 84113


John Bohnsack MD graduated from Yale College, and received his medical degree from the University of Virginia. He is board certified in Pediatrics and in Pediatric Rheumatology. He is a Professor of Pediatrics and has been a member of the faculty of the University of Utah School of Medicine for 22 years.

Dr. Bohnsack’s clinical interests include rheumatic disorders, autoimmune and autoinflammatory diseases (including recurrent fever syndromes) and primary immune deficiency disorders of childhood and adolescence.

Dr. Bohnsack's research interests are currently focused on the epidemiology, genetics and treatment of juvenile arthritis.

Board Certification and Academic Information

Academic Departments Pediatrics - Professor
Academic Divisions Pediatric Immunology and Rheumatology
Board Certification American Board of Pediatrics (Pediatrics)

Academic Profile

Board Certification and Academic Information

Academic Departments Pediatrics - Professor
Academic Divisions Pediatric Immunology and Rheumatology
Board Certification American Board of Pediatrics (Pediatrics)

Academic Office Locations

Academic Office Phone Number Academic Office Address
(801) 662-5706 Primary Children's Hospital
Primary Children's Medical Center
100 N Mario Capecchi Drive
Salt Lake City, UT 84113
(801) 587-7416 Williams Building
Pediatric Allergy, Immunology & Rheumatology
295 Chipeta Way
Salt Lake City, UT 84108

Academic Bio

John Bohnsack MD is Professor and Chief of the Division of Allergy, Immunology and Pediatric Rheumatology. He also serves as the Vice Chair of the Department of Pediatrics for the Clinical Enterprise. Dr. Bohnsack graduated from Yale College, and received his medical degree from the University of Virginia. He trained in Pediatrics at the University of Washington, and then did successive fellowships at the University of Washington, the intramural program of the NIH and at Scripps Research Institute. He joined the faculty of the University of Utah in 1988.

Dr. Bohnsack has received NIH funding for his research on neutrophil adhesion molecules, and the pathophysiology of infections caused by Group B streptococci (GBS). His most recent work on GBS helped identify the population structure of GBS using multi-locus sequence typing, and the specific populations that colonize and infected infants in a prospectively collected sample of GBS from women and infants born in six US academic centers. This work was performed in collaboration with Dr. Kimi Lin, an intramural investigator at the National Institute of Child Health and Development, who led the effort that collected the samples and clinical information from this cohort. Dr. Bohnsack’s interest in the population structure of GBS was spurred by his association with Dr. Shinji Takahashi, a Professor at Shinji-Eiyo University in Saitama, Japan, during Dr. Takahashi’s year in Dr. Bohnsack’s lab as a visiting investigator. Dr. Takahashi had earlier identified clones of GBS using analysis of restriction digest profiles. He and Dr. Takashi continue a long-distance collaboration on the role of l-ficollin in the opsonization of GBS.

Most recently, Dr. Bohnsack’s research has shifted towards identifying the genetic basis of childhood rheumatic diseases. He started the Intermountain States Database for Childhood Rheumatic Diseases in 2000, and then worked as a mentor and colleague with Dr. Sampath Prahalad who further developed the Database by collecting DNA and serum samples from over 500 affected children with well-characterized JIA. Dr. Bohnsack was a mentor for Dr. Prahalad’s KO-8 funded research at the University of Utah which identified polymorphisms in selected genes with JIA. The Database continues to expand, and now includes close to 700 samples from affected patients and a larger number of samples from parents. His collaboration continues with Dr. Prahalad, who joined the faculty at Emory University in 2008. They are beginning work on Dr. Prahalad’s NIH RO-1 which will examine segmental chromosome sharing in JIA patients in the Database that are in extended pedigrees identified using the resources of the Utah Population Database. Samples from the Database are also being used in collaborative multi-institutional Genome Wide Association Studies at Cincinnati Children’s Hospital and at the intramural program at the NIH.

Dr. Bohnsack’s clinical interests include the evaluation and treatment of rheumatic disorders, autoimmune and autoinflammatory diseases (including recurrent fever syndromes) and primary immune deficiency disorders of childhood and adolescence. His administrative role in the Department includes oversight of the revenue cycle, Pediatric contracting, implementation of clinical information systems, and redesign of the ambulatory clinics to improve patient and physician satisfaction. He participates in the Primary Childrens’ Medical Center Value Project, a working group that is devising and implementing measures to improve quality while containing cost, and has been an elected member of the University of Utah Medical Group Board since 2005.


Education History

Type School Degree
Research Fellow Scripps Clinic & Research Foundation
Research Fellow
Fellowship National Institutes of Health
Fellowship University of Washington
Residency University of Washington
Internship University of Washington
Professional Medical University of Virginia
Undergraduate Yale University
Molecular Biophysics and Biochemistry


Selected Provider Publications

Journal Article

  1. Prahalad S, Conneely KN, Jiang Y, Sudman M, Wallace CA, Brown MR, Ponder LA, Rohani-Pichavant M, Zwick ME, Cutler DJ, Angeles-Han ST, Vogler LB, Kennedy C, Rouster-Stevens K, Wise CA, Punaro M, Reed AM, Mellins ED, Bohnsack JF, Glass DN, Thompson S(2013)Susceptibility to childhood onset rheumatoid arthritis: Investigation of a weighted genetic risk score that integrates cumulative effects of variants at five genetic loci.LID - 10.1002/art.37913 [doi]  Arthritis & Rheumatism,
  2. Hinks A, Cobb J, Marion MC, Prahalad S, Sudman M, Bowes J, Martin P, Comeau ME, Sajuthi S, Andrews R, Brown M, Chen WM, Concannon P, Deloukas P, Edkins S, Eyre S, Gaffney PM, Guthery SL, Guthridge JM, Hunt SE, James JA, Keddache M, Moser KL, Nigrovic PA, Onengut-Gumuscu S, Onslow ML, Rose CD, Rich SS, Steel KJ, Wakeland EK, Wallace CA, Wedderburn LR, Woo P, Bohnsack JF, Haas JP, Glass DN, Langefeld CD, Thomson W, Thompson S(2013)Dense genotyping of immune-related disease regions identifies 14 new susceptibility loci for juvenile idiopathic arthritis.LID - 10.1038/ng.2614 [doi]  Nature Genetics,
  3. Thompson SD, Marion MC, Sudman M, Ryan M, Tsoras M, Howard TD, Barnes MG, Ramos PS, Thomson W, Hinks A, Haas JP, Prahalad S, Bohnsack JF, Wise CA, Punaro M, Rose CD, Pajewski NM, Spigarelli M, Keddache M, Wagner M, Langefeld CD, Glass D(2012)Genome-wide association analysis of juvenile idiopathic arthritis identifies a new susceptibility locus at chromosomal region 3q13.  Arthritis & Rheumatism, 64(8),2781-91
  4. Fujieda M, Aoyagi Y, Matsubara K, Takeuchi Y, Fujimaki W, Matsushita M, Bohnsack JF, Takahashi (2012)L-ficolin and capsular polysaccharide-specific IgG in cord serum contribute synergistically to opsonophagocytic killing of serotype III and V group B streptococci.  Infection and Immunity, 80(6),2053-60
  5. Tebo AE, Jaskowski T, Davis KW, Whiting A, Clifford B, Zeft A, McNally B, Hill HR, Bohnsack J, Prahalad (2012)Profiling anti-cyclic citrullinated peptide antibodies in patients with juvenile idiopathic arthritis.  Pediatric Rheumatology Online Journal, 10(1),29
  6. Chattopadhyay D, Carey AJ, Caliot E, Webb RI, Layton JR, Wang Y, Bohnsack JF, Adderson EE, Ulett G(2011)Phylogenetic lineage and pilus protein Spb1/SAN1518 affect opsonin-independent phagocytosis and intracellular survival of Group B Streptococcus.  Microbes and Infection, 13(4),369-82
  7. Prahalad S, Thompson SD, Conneely KN, Jiang Y, Leong T, Prozonic J, Brown MR, Ponder LA, Angeles-Han ST, Vogler LB, Kennedy C, Wallace CA, Wise CA, Punaro M, Reed A, Park JL, Mellins ED, Zeft AS, Bohnsack JF, Glass A(2011)Hierarchy of risk of childhood onset rheumatoid arthritis conferred by HLA-DRB1 alleles encoding the shared epitope.LID - 10.1002/art.33376 [doi]  Arthritis & Rheumatism,
  8. Prahalad S, Zeft AS, Pimentel R, Clifford B, McNally B, Mineau GP, Jorde LB, Bohnsack J(2010)Quantification of the familial contribution to juvenile idiopathic arthritis.  Arthritis & Rheumatism, 62(8),2525-9
  9. Stringer E, Bohnsack J, Bowyer SL, Griffin TA, Huber AM, Lang B, Lindsley CB, Ota S, Pilkington C, Reed AM, Scuccimarri R, Feldman B(2010)Treatment approaches to juvenile dermatomyositis (JDM) across North America: The Childhood Arthritis and Rheumatology Research Alliance (CARRA) JDM Treatment Survey.  Journal of Rheumatology, 37(9),1953-61
  10. Thompson SD, Sudman M, Ramos PS, Marion MC, Ryan M, Tsoras M, Weiler T, Wagner M, Keddache M, Haas JP, Mueller C, Prahalad S, Bohnsack J, Wise CA, Punaro M, Zhang D, Rose CD, Comeau ME, Divers J, Glass DN, Langefeld C(2010)The susceptibility loci juvenile idiopathic arthritis shares with other autoimmune diseases extend to PTPN2, COG6, and ANGPT1.  Arthritis & Rheumatism, 62(11),3265-76
  11. Pont-Kingdon G, Bohnsack J, Sumner K, Whiting A, Clifford B, Guthery SS, Jorde LB, Lyon E, Prahalad (2009)Lack of association between beta 2-adrenergic receptor polymorphisms and juvenile idiopathic arthritis.  Scandinavian Journal of Rheumatology, 38(2),91-5
  12. Zeft A, Hollister R, LaFleur B, Sampath P, Soep J, McNally B, Kunkel G, Schlesinger M, Bohnsack (2009)Anakinra for systemic juvenile arthritis: the Rocky Mountain experience.  Journal of Clinical Rheumatology, 15(4),161-4
  13. Evans JJ, Klesius PH, Pasnik DJ, Bohnsack J(2009)Human Streptococcus agalactiae isolate in Nile tilapia (Oreochromis niloticus).  Emerging Infectious Diseases, 15(5),774-6
  14. Prahalad S, Hansen S, Whiting A, Guthery SL, Clifford B, McNally B, Zeft AS, Bohnsack JF, Jorde L(2009)Variants in TNFAIP3, STAT4, and C12orf30 loci associated with multiple autoimmune diseases are also associated with juvenile idiopathic arthritis.  Arthritis & Rheumatism, 60(7),2124-30
  15. Zeft AS, Prahalad S, Lefevre S, Clifford B, McNally B, Bohnsack JF, Pope CA 3r(2009)Juvenile idiopathic arthritis and exposure to fine particulate air pollution.  Clinical and Experimental Rheumatology, 27(5),877-84
  16. Aoyagi Y, Adderson EE, Rubens CE, Bohnsack JF, Min JG, Matsushita M, Fujita T, Okuwaki Y, Takahashi (2008)L-Ficolin/mannose-binding lectin-associated serine protease complexes bind to group B streptococci primarily through N-acetylneuraminic acid of capsular polysaccharide and activate the complement pathway.  Infection and Immunity, 76(1),179-88
  17. Bohnsack JF, Whiting A, Gottschalk M, Dunn DM, Weiss R, Azimi PH, Philips JB 3rd, Weisman LE, Rhoads GG, Lin F(2008)Population structure of invasive and colonizing strains of Streptococcus agalactiae from neonates of six U.S. Academic Centers from 1995 to 1999.  Journal of Clinical Microbiology, 46(4),1285-91
  18. Prahalad S, Martins TB, Tebo AE, Whiting A, Clifford B, Zeft AS, McNally B, Bohnsack JF, Hill H(2008)Elevated serum levels of soluble CD154 in children with juvenile idiopathic arthritis.  Pediatric Rheumatology Online Journal, 68
  19. Prahalad S, Bohnsack JF, Whiting A, Clifford B, Jorde LB, Guthery SL, Thompson SD, Glass DN, Bamshad M(2008)Lack of association of functional CTLA4 polymorphisms with juvenile idiopathic arthritis.  Arthritis & Rheumatism, 58(7),2147-52
  20. Lovell DJ, Ruperto N, Goodman S, Reiff A, Jung L, Jarosova K, Nemcova D, Mouy R, Sandborg C, Bohnsack J, Elewaut D, Foeldvari I, Gerloni V, Rovensky J, Minden K, Vehe RK, Weiner LW, Horneff G, Huppertz HI, Olson NY, Medich JR, Carcereri-De-Prati R, McIlraith MJ, Giannini EH, Martini (2008)Adalimumab with or without methotrexate in juvenile rheumatoid arthritis.  New England Journal of Medicine, 359(8),810-20
  21. Evans JJ, Bohnsack JF, Klesius PH, Whiting AA, Garcia JC, Shoemaker CA, Takahashi (2008)Phylogenetic relationships among Streptococcus agalactiae isolated from piscine, dolphin, bovine and human sources: a dolphin and piscine lineage associated with a fish epidemic in Kuwait is also associated with human neonatal infections in Japan.  Journal of Medical Microbiology, The, 57(Pt 11),1369-76
  22. Prahalad S, Bohnsack JF, Jorde LB, Whiting A, Clifford B, Dunn D, Weiss R, Moroldo M, Thompson SD, Glass DN, Bamshad M(2006)Association of two functional polymorphisms in the CCR5 gene with juvenile rheumatoid arthritis.  Genes and Immunity, 7(6),468-75
  23. Oliveira IC, de Mattos MC, Pinto TA, Ferreira-Carvalho BT, Benchetrit LC, Whiting AA, Bohnsack JF, Figueiredo A(2006)Genetic relatedness between group B streptococci originating from bovine mastitis and a human group B Streptococcus type V cluster displaying an identical pulsed-field gel electrophoresis pattern.  Clinical Microbiology and Infection, 12(9),887-93
  24. Ruperto N, Ravelli A, Castell E, Gerloni V, Haefner R, Malattia C, Kanakoudi-Tsakalidou F, Nielsen S, Bohnsack J, Gibbas D, Rennebohm R, Voygioyka O, Balogh Z, Lepore L, Macejkova E, Wulffraat N, Oliveira S, Russo R, Buoncompagni A, Hilario MO, Alpigiani MG, Passo M, Lovell DJ, Merino R, Martini A, Giannini E(2006)Cyclosporine A in juvenile idiopathic arthritis. Results of the PRCSG/PRINTO phase IV post marketing surveillance study.  Clinical and Experimental Rheumatology, 24(5),599-605


  1. Anaya JM, Kim-Howard X, Prahalad S, Chernavsky A, Canas C, Rojas-Villarraga A, Bohnsack J, Jonsson R, Bolstad AI, Brun JG, Cobb B, Moser KL, James JA, Harley JB, Nath S(2012)Evaluation of genetic association between an ITGAM non-synonymous SNP (rs1143679) and multiple autoimmune diseases.  Autoimmunity Reviews, 11(4),276-80

Conference Proceedings

  1. Zeft A, Yaish H, Prince J, Bohnsack J, Jackson WD, Coffin C(2008)A 6-year-old child with Fever of unknown origin, anemia, and abdominal pain.  Utah Special Educator, 153(2),283-6, 286.e1

Case Report

  1. Sampert C, Lowichik A, Rollins M, Inman CJ, Bohnsack J, Pohl J(2011)Sclerosing mesenteritis in a child with celiac disease.  Journal of Pediatric Gastroenterology and Nutrition, 53(6),688-90
  2. Deneau M, Wallentine J, Guthery S, O'Gorman M, Bohnsack J, Fluchel M, Bezzant J, Pohl J(2010)Natural killer cell lymphoma in a pediatric patient with inflammatory bowel disease.  Pediatrics Electronic Pages, 126(4),e977-81


  1. Zeft A, Bohnsack J(2007)Cryopyrin-associated autoinflammatory syndrome: a new mutation.  Annals of the Rheumatic Diseases, 66(6),843-4

Clinical Trials

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