Dr. Sujoy Khan Allergy Specialist in Kolkata

Dr. Sujoy Khan
Allergy Specialist, Kolkata

MBBS (CMC Vellore), FRCP (Edin), FRCPath (London)

Dr. Sujoy Khan is one of the reputed doctors of Kolkata, who has distinguished himself as one of the eminent allergy specialists in the state of West Bengal.  Dr. Khan is available for consultations at the Apollo Gleneagles Hospital, Kolkata.

Dr. Khan specializes in the areas of Allergy and Immunology. He offers his expertise in Immunology, Angioedema, Aeroallergen sensitivity, such as pollen, house and dust mites, Drug allergy, Food allergy, Insect sting allergy, and Urticaria.

Dr Sujoy Khan graduated from the prestigious institution CMC Vellore, and then went to do his residency in Pulmonary Medicine. He, later, did his postgraduate training in the United Kingdom and received the MRCP (UK) in 2004. He was then selected for the 5-year training in the specialty of Immunology & Allergy at St Bartholomew’s Hospital, London. He completed CCST Immunology and received his FRCPath qualification in 2010. 

Dr. Khan obtained his MRCP (UK) in Adult Internal Medicine, from the Royal College of Physicians of Edinburgh in 2004, his FRCP (Edin) in Adult Internal Medicine from the Royal College of Physicians of Edinburgh in 2011, and the FRCP by the Royal College of Physicians of Edinburgh in 2012.

Dr. Khan was conferred the DRCPath (Immunology) from the Royal College of Pathologists, London, in 2008, and the FRCPath (Immunology), from the Royal College of Pathologists, London in 2010. 


  • Allergy

  • Immunology

  • Laboratory Medicine


  • Immunology
  • Angioedema
  • Aeroallergen sensitivity (pollen, house dust mite etc) - for potential desensitization
  • Drug allergy
  • Food allergy
  • Insect sting allergy (for desensitization)
  • Urticaria


  • Dr Sujoy Khan graduated from the prestigious institution CMC Vellore and then was a resident in Pulmonary Medicine
  • He subsequently completed his postgraduate training in the United Kingdom and received the MRCP(UK) in 2004
  • He was then selected for the 5-year training in the specialty of Immunology & Allergy at St Bartholomew’s Hospital, London with rotation in Midlands deanery and completed CCST Immunology and received FRCPath qualification in 2010
  • The Royal College of Physicians of Edinburgh conferred the FRCP qualification in 2012
  • FRCP (Edin) Adult Internal Medicine, Royal College of Physicians of Edinburgh, 2011
  • FRCPath (Immunology), Royal College of Pathologists, London, 2010
  • DRCPath (Immunology), Royal College of Pathologists, London, 2008
  • MRCP (UK) Adult Internal Medicine, Royal College of Physicians of Edinburgh, 2004

Practice Information

Apollo Gleneagles Hospital, Kolkata

Apollo Gleneagles Hospital, Kolkata

Near Saltlake Stadium, No. 58, Canal Circular Road, Kolkata, West Bengal - 700054

Patient Experience

Your participation in the survey will help other patients make informed decisions. You will also be helping Dr. Sujoy Khan and his staff know how they are doing and how they can improve their services.

Achievements & Contributions

  • Proteomics: Glycosylation status of IgG in commercial immunoglobulin preparationsThis research was done at Sheffield Hallam University (2009-2010) using MALDI-MS to examine the glycosylation status of IgG in commercial immunoglobulin preparations.SDS-PAGE of latex skin testing solutions (non-ammoniated Vs ammoniated)This research was done at Hull Royal Infirmary (2008) to verify whether the ammoniated latex skin prick testing solution had the relevant allergens when compared with the non-ammonia
  • Biographee in ‘Who's Who in Science and Engineering’ 2011-2012 (11th Edition),2012
  • Biographee in ‘Who’s Who in the World 2012’ 28th Edition, Marquis Who’s Who, USA, 2011
  • Interview by ‘BBC South Today’ on ‘Allergies and Oral Allergy Syndrome’ – aired 24th August,2011 
  • Biographee in ‘Dictionary of International Biography’ 35th Edition, Cambridge, England, 2010
  • Biographee in ‘Who’s Who in the World’ 26th Edition, Marquis Who’s Who, USA, 2009
  • Biographee in ‘Dictionary of International Biography’ 34th Edition, Cambridge, England, 2008
  • Biographee in ‘Who’s Who in Science and Engineering’ 2008-2009 10th Edition, the Marquis Who’s Who publications board, USA, 2007
  • Recipient of Myre Sim Research grant, Royal College of Physicians of Edinburgh, 2007
  • 2nd in Annual General Medi Quiz, Apollo Hospital, Chennai, India, 2000
  • Undergraduate Research award, CMC Vellore, India, 1999
  • 3rd in annual undergraduate quiz in psychiatry (CMC Vellore, India), 1999
  • Best paper Neurology “Stem-cell transplantation in neurodegenerative diseases”, 1998
  • Best paper Anatomy: Parotid Gland; Physiology: Erythropoietin, 1997
  • Best paper Biochemistry: RNA Editing (Annual essay competition CMC Vellore), 1996
  • 1st certificate of honor: Biochemistry, Forensic Medicine (CMC Vellore, India)  
  • 2nd certificate of honor: Anatomy, Physiology, Pharmacology, Pathology, Microbiology and Community Medicine (CMC Vellore, India)
  • Publications (Selected)Original articles, Book Chapters, Letter to the EditorKhan S. Comparison of cytokine responses with anti-D and IVIG in ITP. Transfusion Medicine and Hemotherapy 2013 February; 40(1): 49
  • Khan S. The pitfalls of FeNO testing. Allergology International 2013 March; 62(1): 143
  • Nakonechna A, Dore P, Dixon T, Khan S, Deacock S, Holding S, Abuzakouk M. Immediate hypersensitivity to chlorhexidine is increasingly recognised in the United Kingdom. Allergol Immunopathol (Madr). 2012 Dec 19. [Epub ahead of print]
  •  Khan S. Chronic urticaria and use of statins. Asia Pacific J Allergy 2012 Jul; 2(3): 227-9
  •  Khan S. Coeliac disease and granulomatous gut complications in common variable immunodeficiency disorders. J R Coll Physicians Edinb. 2012 June; 42(2): 189-190.
  • Khan S, Lynch N. Efficacy of montelukast as added therapy in patients with chronic idiopathic urticaria. Inflamm Allergy Drug Targets 2012 June 1; 11(3): 235-243
  •  Philip S, Khan S. The finding of anticardiolipin antibodies in patients with pseudoexfoliation syndrome requires further evaluation. Journal of Glaucoma 2012 March; 21(3): 206
  • Khan S. Abnormal IL-7 signalling may lead to loss of bone mineral density in common variable immunodeficiency. Paed Allergy Immunol 2012 March; 23(2): 202
  • Khan S. The role of hypoxia-inducible factor-1 alpha in TEMPI syndrome. Neph Dialysis Transplantation Plus 2011 December; 4(6): 454-5
  • Khan S. PLA2R autoantibodies, complement activation and podocyte damage. Neph Dialysis Transplantation 2011 December; 26(12): 4151
  • Khan S, Korniyenko A, Meserli FH. Angioedema secondary to renin inhibitor aliskiren. Cleve Clin J Med 2011 Nov; 78(11): 722
  • Sujoy Khan. Serum N-glycan profiles in advanced age correlate with markers of fibrosis. Age Ageing 2011 [E-letter] available at: http://ageing.oxfordjournals.org/content/40/5/568/reply#ageing_el_249 [16 September 2011]
  • Khan S. Antiphospholipid syndrome as cause of cognitive decline or dementia in the elderly. J R Coll Physicians Edinb. 2011 Jun; 41(2): 187-9
  • Khan S, Deacock S. Expanding indications of omalizumab therapy in the absence of specific IgE. Allergol Immunopathol 2011 May-Jun; 39(3): 189
  • Khan S, Grimbacher B, Boecking C, Chee R, Allgar V, Holding S, Wong G, Huissoon A, Herriot R, Doré P, Sewell W. Serum Trough IgG level and Annual Intravenous Immunoglobulin Dose Are Not Related to Body Size in Patients on Regular Replacement Therapy. Drug Metab Lett. 2011 Apr 1; 5(2):132-6
  • Khan S, Singh S. Practical issues for clinicians using high-dose intravenous immunoglobulin. Indian J Dermatology 2011Jan-March; 56(1): 122-3
  • Khan S, Abuzakouk M, Doré PC, Sewell WA. Administering intravenous immunoglobulin during infection is associated with infusion reaction in selected patients. Irish Journal of Medical Sciences 2011 March; 180(1): 125-8
  • Khan S. Regulatory T-cell detection by flow cytometry and systemic sclerosis. Clinical and Translational Science 2011 Feb; 4(1): 72.
  • Khan S, Deacock S. Omalizumab therapy to prevent anaphylaxis in systemic mastocytosis. Blood [E-letter] http://bloodjournal.hematologylibrary.org/cgi/eletters/116/26/5812 14 January 2011
  • Khan S, Pereira J, Darbyshire PJ, Holding S, Doré PC, Sewell WA, Huissoon A. Do ribosomopathies explain some cases of common variable immunodeficiency? Clinical & Experimental Immunology 2011 January; 163(1): 96-103 
  • Sujoy Khan and Anand Zachariah. ‘Practice in the ICU: The case of organophosphate poisoning’. In: Towards a Critical Medical Practice. Reflections on the Dilemmas of Medical Culture Today. Edited by: Anand Zachariah, R Srivatsan and Susie Tharu on behalf of the CMC-Anveshi Collective. Orient Blackswan Publications. 2010. Hyderabad. India. Chapter 16, pages 285-298
  • Khan S, Davies L, Cowley D, Wild G, Sewell WA. Anti-acetylcholine receptor antibody reactivity of IgG in commercial immunoglobulin preparations. Clin Neurol Neurosurg 2010 November; 112(9): 835-6
  • Khan S. Nitric oxide generation after IVIG in sickle cell crises. Blood [E-letter] http://bloodjournal.hematologylibrary.org/cgi/eletters/116/5/687. 9 August 2010.
  • Khan S, Doré PC, Sewell WA. Intravenous immunoglobulin-induced neutropenia. Paediatr Allergy Immunol 2010 August 1; 21(5): 892-3
  • Khan S, Holding S, Doré PC, Sewell WA. Pitfalls in the diagnosis of latex allergy. Allergology International 2010 July 29; 59(3): 305-8
  • Khan S. Recurrent infections with Aspergillus require exclusion of defects in the phagocyte NADPH oxidase pathway. Indian J Medical Microbiology 2010 July-September; 28(3): 269
  • Khan S. Anti-IL-5 therapy and DRESS. CMAJ 2010 Jun; 182(9): 941
  • Sujoy Khan. The ELISA Guidebook 2nd Edition. By: John R. Crowther. Humana Press; 2009. Published in: Immunology News for British Society for Immunology November 2009: 39-40. (Book Review) 
  • Khan S, Myers K. Warfarin can be safe and effective in the extreme elderly. Age and Ageing 2009 November; 38(6): 763
  • Khan S. The epithelial mucin MUC1 and virus-specific antibodies target cell-free human immunodeficiency virus in human breast milk. The Pediatric Infectious Disease Journal 2009 October; 28(10): 932
  • Sujoy Khan. Basic and Clinical Immunology. By: Mark Peakman and Diego Vergani, Churchill Livingstone ELSEVIER; 2nd edition, 2009. Published in: The Bulletin of The Royal College of Pathologists October 2009; 148: 324. (Book Review)
  •  Khan S, Campbell A, Hunt C, Sewell WA. Lichen planus in a case of Good’s syndrome (thymoma and immunodeficiency). Interact Cardiovasc Thorac Surg 2009 August; 9(2): 345-346
  •  Khan S, Vaishnavi A. Pharmacotherapy for gastric antral vascular ectasia: dramatic response to tranexamic acid. Gastrointest Endosc 2009 July; 70(1): 191
  • Khan S, Sims S, Raine D, Sewell WAC. Both autoantibodies and pathogen-specific antibodies are present in immunoglobulin preparations and reflect characteristics of the donor population. J Am Acad Dermatol 2008 December; 59(6): 1089-1090
  • Khan S, Doré PC, Sewell WAC. The value of total IgE levels in the context of specific allergy. Paediatr Allergy Immunol 2008 December; 19(8): 777-778.
  • Sujoy Khan, WAC Sewell. Trapping the T cells – superagonist CD28 antibodies. Immunotherapeutics Quarterly 2008; 8(27): 6-7
  • Khan S, Hinks J, Shorto J, Schwarz MJ, Sewell WA. Some cases of common variable immunodeficiency may be due to a mutation in the SBDS gene of Shwachman-Diamond syndrome. Clin Exp Immunol 2008 Mar; 151(3): 448-454
  • Khan S, Alvi A, Holding S, Kemp M, Raine D, Doré PC, Sewell WA. The clinical significance of antinucleolar antibodies. Journal of Clinical Pathology 2008 Mar; 61(3): 283-286. [Article of the month on Phadia web site May 2008, available at: http://www.immunocap.com/dia_templates/Page____42463.aspx] 
  • Khan S, Doré PC, Sewell WA. Both patient characteristics and IVIG product-specific mechanisms may affect eosinophils in immunoglobulin-treated Kawasaki disease. Pediatr Allergy Immunol 2008 Mar; 19(2): 186-187.
  • Khan S, Holding S, Doré PC, Sewell WA. Abnormal glycosylation of CD43 may account for some features of Wiskott-Aldrich syndrome. Medical Hypotheses 2008; 70(2): 269-272
  • Sujoy Khan. IVIG effects on Treg expansion and dendritic cell maturation in multiple sclerosis. Immunotherapeutics Quarterly Dec2007/Jan2008; 8(26): 2-3
  • Khan S, Sewell WA. Risks of intravenous immunoglobulin in sepsis affect trial design. Ann Int Med 2007 Dec 4; 147(11): 813; author reply 813-4
  • Khan S, Doré PC, Sewell WA. Anti-proteinase 3 antibodies utilise innate signalling pathways that lead to inflammation. J R Coll Physicians Edinb 2007 Dec; 37: 379
  • Sujoy Khan. Immunoglobulin treatment of Kawasaki disease-factors that affect response. Immunotherapeutics Quarterly 2007 August; 8(25): 5-6.
  • Sujoy Khan. Sugars maintain the anti-inflammatory activity of IVIG. Immunotherapeutics Quarterly 2007 June; 7(24): 4-5
  • Khan S, Doré PC, Sewell WA. Could oral spleen tyrosine kinase inhibitors lead to neoplastic transformation? Journal of Allergy and Clinical Immunology 2007 May; 119(5): 1277 
  • Khan S, Tarzi MD, Dore PC, Sewell WA, Longhurst HJ. Secondary systemic lupus erythematosus: an analysis of 4 cases of uncontrolled hereditary angioedema. Clinical Immunology 2007 April; 123 (1): 14-17
  • Khan S, Sharrack B, Sewell WAC. Metronidazole-induced aseptic meningitis during Helicobacter pylori eradication therapy. Ann Intern Med 2007 Mar 6; 146(5): 395-396
  • Khan S, Sewell WAC. Oral Immunosuppressive agents. Clinical Medicine 2006; Jul-Aug; 6(4): 352-5 
  • Khan S. Clinical utility of the Coombs’ test. CMAJ 2006 Oct10; 175(8): 919
  • Khan S, El-dars L, Holt PJ. Musculoskeletal and myotoxic side-effects in a patient treated for psoriasis. British Journal of Dermatology 2006; 155 (2): 481. 
  • Sewell WAC, Khan S, Dore PC. Early indicators of immunodeficiency in adults and children: protocols for screening for primary immunological defects. Clinical & Experimental Immunology 2006; 145(2): 201-203 
  • Khan S, Sewell WA. Hepatitis C: reviewing the options. CMAJ 2006 Jul 4; 175(1): 63 
  • Khan S, Dore PC, Sewell WAC. CD4+CD28null T cell and Toll like receptor interaction: a new link to rheumatoid arthritis and atherosclerosis? J R Coll Physicians Edinb. 2006; 36: 190 
  • Khan S. Organophosphate poisoning (OPP). Mt Sinai J Med. 2006 May; 73(3): 636
  • Khan S, Subedi D, Chowdhury MM. Use of amino terminal type III procollagen peptide (P3NP) assay in methotrexate therapy for psoriasis. Postgrad Med J. 2006 May; 82(967): 353-354
  • Khan S. Acute oxygen-sensing mechanisms. N Engl J Med. 2006 Mar 2; 354(9): 975-7. Author reply 975-7
  • Khan S. Conjugate vaccines and polysaccharide response. CMAJ. 2006 Mar 28; 174(7): 976-7
  • Khan S, Myers K. Persistence of Natural Killer (NK) cell lymphocytosis with hyposplenism without development of leukaemia. BMC Clin Pathol. 2005 Sep 7; 5:8
  • Khan S. Psoriasis [Does loss of functional suppression of CD4+CD25high cells initiate psoriasis? Correspondence] N Engl J Med. 2005 Aug 25; 353(8): 848-50
  • Sujoy Khan, A Vaishnavi. Hereditary Hyperferritinemia Cataract Syndrome. GastroHep.com 2004. http://www.gastrohep.com/classcases/classcases.asp?id=18 
  • Sujoy Khan, Anil Roy, DJ Christopher, AM Cherian. Prevalence of bronchial asthma in Vellore using a questionnaire-based data. Journal of Indian Medical Association (JIMA) 2002 November; 100(11): 643-644 
  • Khan S, Hemalatha R, Jeyaseelan L, Oommen A, Zachariah A. Neuroparalysis and oxime efficacy in organophosphate poisoning: a study of Butyrylcholinesterase. Human & Experimental Toxicology 2001 April; 20(4): 169-74
  • Abstracts and oral presentationsLynch N, Khan S. Efficacy of montelukast in chronic idiopathic urticaria. Clinical and Experimental Allergy 2011 December; 41(12): 1836
  • Karim Y, Adhya Z, Khan S, Griffiths H, Deacock S. Acquired C1-inhibitor deficiency secondary to haematological disease – experience from a UK Immunology centre. Clinical and Experimental Allergy 2011 December; 41(12): 1846
  • Griffiths H, McQueen P, Deacock S, Khan S. Audit of use of laboratory allergy services by a community-based NHS Children’s Centre and potential cost savings. Clinical and Experimental Allergy 2011 December; 41(12): 1851
  • Khan S, Adhya Z, Karim Y, Griffiths H, Deacock S, Bright P, Longhurst H. Low APTT in C1-inhibitor deficiency: an audit of two Immunology centres in the UK. Immunology 2010 December; 131(S1): 118
  • Martin A, Khan S, Wright P, Hampshire S, Sewell WAC. Analysis of the Immunoglobulin Advisory Panel workload in Greater Lincolnshire. Clinical & Experimental Immunology 2010 April; 160(s1): 15-16
  • Woellner C, Gertz EM, Schaffer AA, Lagos M, Perro M, Pietrogrande MC, Cossu F, Franco JL, Matamoros N, Pietrucha B, Heropolitańska-Pliszka E, Yeganeh M, Espanol T, Ehl S, Gennery AR, Abinun M, Breborowicz A, Niehues T, Kilic SS, Junker A, Turvey S, Plebani A, Sánchez B, Garty BZ, Pignata C, Cancrini C, Litzman J, Sanal Ö, Baumann U, Bacchetta R, Hsu A, Davis JN, Hammarstroem L, Davies EG, Eren E, Arkwright PD, Moilanen JS, Viemann D, Khan S, Máró
  • Khan S, Dawson S, Moor J, Sewell WAC, Doré PC. A patient survey on the use and effectiveness of aerosolised epinephrine (Primatene Mist inhaler) for the treatment of anaphylaxis/angioedema. Journal of Allergy and Clinical Immunology 2009 Feb; 123(2): S49
  • Holding S, Khan S, Sewell WAC, Doré PC. Comparison of commercial non-ammoniated and ammoniated latex skin prick testing solutions by SDS-PAGE. Journal of Allergy and Clinical Immunology 2009 Feb; 123(2): S169
  • Khan S, Del-Duca C, Holding S, Fenton E, Hirst J, Doré PC, Sewell WA. Autoantibody screening strategies for pernicious anaemia. Immunology 2008 December; 125(S1): 106
  • Khan S, Huissoon A, Holding S, Sewell WA, Doré PC. Features of a ribosome biogenesis defective disease (Diamond-Blackfan anaemia) in a patient with possible CVID. Clinical & Experimental Immunology 2008 November; 154(S1): 53-54
  • S Khan, S Kapoor, V Allgar, WAC Sewell. A questionnaire-based study on parents’ perception of food allergy in pre-school children. Journal of Allergy and Clinical Immunology 2008 Feb; 121(2) Supplement 1: S241
  • O Fraser, S Khan, A Alavi, E Tarelli, J Axford, WAC Sewell. Glycosylation differences among commercial IVIG preparations may account for variable immunomodulatory responses. Poster presentation at Protein Modifications in Autoimmunity symposium at British Society of Rheumatology (BSR) annual meeting, Birmingham, UK. 8th-11th May 2007
  • S Khan, S Holding, A Alvi, S Saravana, WAC Sewell. The clinical significance of antinucleolar antibodies. Journal of Allergy and Clinical Immunology 2007; 119(1): S17
  • S Khan, S Holding, J Moor, PC Doré, WAC Sewell. Analysis of total IgE cut-off levels with negative specific IgE for requirement of skin testing in latex allergy. Clinical and Experimental Allergy 2006; 36: 1208
  • 15. Kalavala M, Motley RJ, Khan S, Subedi D. Successful treatment of epidermolysis bullosa acquisita with intravenous immunoglobulin (IVIG). J Am Acad Dermatol 2006 Mar; 54(3): Suppl AB137
  • 16. S Khan, B Sharrack, WAC Sewell. Recurrent meningitis secondary to metronidazole used as helicobacter eradication therapy. J Allergy Clin Immunol. 2006 Feb; 117(2): S173
  • V Nandakumar, S Khan. Limited diagnostic value of routine chest radiograph after thoracentesis. Poster presentation at the Radiological Society of North America (RSNA) 91st Annual Conference, McCormick Place, Chicago. 27th Nov- 2nd Dec 2005
  • S Khan, D Subedi, MMU Chowdhury. Audit on Type III procollagen peptide assay levels in methotrexate therapy for psoriasis. Br J Dermatol 2005; 153 (S1): 31
  • S Khan, VM Biju, V Nanda Kumar, H Al-Madfai, I B Davies. Subdural hematoma in a district general hospital: Analysis of features predictive of outcome. Age Ageing. 2005 Jul; 34 (S1): i32.
  • S Khan, A Vaishnavi. An Unusual Cause Of Hyperferritinemia. The European Hematology Journal. 2003; 4 (S3): 65
  • VK Harris, SM Amelia, K Sujoy, S Sameer and M Senthil. An unusual cause of pleural effusion. CHEST 2002; 122 (S4): 249S
  • Oral presentation- “Neuroparalysis in acute Organophosphate Poisoning and oxime reactivation” at the 7th National Critical Care Congress (CCCON) 2001, Bangalore, India. 2nd-7th January 2001
  • Oral presentation-“Choledochal Cyst: An Embryological Enigma” – Best Paper presented at Scientific Session in the Embryology category, 21st Annual Conference 1998 at Chennai, India
  • Indian Academy of Allergy (IAA) – life time member (no: 295)
  • British Society for Immunology (BSI)
  • American Academy of Allergy, Asthma and Immunology (AAAAI)
  • Clinical Immunology Society (CIS)
  • British Association of Allergy & Clinical Immunology (BSACI) [2005-2012]
  • European Academy of Allergology and Clinical Immunology (EAACI)
  • United Kingdom Primary Immunodeficiency Network (UK-PIN)