• NAFLD - Epidemiology and Genetics
• Portal hypertension
• Cirrhosis and complications
• CLD epidemiology
• IBD - Epidemiology and Genetics
• Endoscopic techniques

• Vice Chancellor’s awards for Best Senior Researcher 2018 (2nd place) - Faculty of Medicine University of Kelaniya, Sri Lanka
• “APDWF Young Clinician/Investigator travel grant awardee 2018” Asia-Pacific Digestive Week 2018, Seoul, Republic of Korea – November 2018
• “Presidential Poster of Distinction” The Liver Meeting 2018, organised by the American Association for the Study of the Liver (AASLD), San Francisco, CA, United States – November 2018
• “Best publication by a physician 2017” 51st Annual Academic Sessions of the Ceylon College of Physicians (CCP), Colombo, Sri Lanka
• Vice Chancellor’s awards for Best Researcher 2016 (1st place) - Faculty of Medicine University of Kelaniya, Sri Lanka
• “Best oral free paper in non-alcoholic fatty liver disease" United European Gastroenterology Week (UEGW) 2016, Vienna, Austria – October 2016
• “S E Seneviratna Prize” Sri Lanka Medical Association (SLMA) 129th Anniversary International Medical Congress 2016, September 2016
• "Kumaradasa Rajasuriya Prize for the best paper in Tropical Medicine” Sri Lanka Medical Association (SLMA) 129th Anniversary International Medical Congress 2016, September 2016
• E M Wijerama Prize 2015.128th Anniversary Sri Lanka Medical Association (SLMA) International Medical Congress 2015 for best research presentation for “A randomized control study of audio versus visual distraction to reduce patient discomfort during colonoscopy”
• E M Wijerama Prize 2010. 123rd Anniversary Sri Lanka Medical Association (SLMA) International Medical Congress 2010 for best research presentation for “The prone 12 o’clock position reduces ileal intubation time during colonoscopy compared to the left lateral 6 o’clock (standard) position”
• Presidential Research award for scientific publications National Research Council – 2010, 2011, 2014, 2015, 2016, 2017, 2018
• Vice Chancellor’s awards for scientific publication University of Kelaniya – 2014, 2016
• Senate Honours for Scientific Publications University of Kelaniya – 2016, 2017
• Best oral presentation in NAFLF/General Hepatology award for oral presentation “Association of genetic variants with non-alcoholic fatty liver disease in an urban Sri Lankan community” at United European Gastroenterology Week (UEGW) UEGW 2013, Berlin, Germany
• Scholarship to attend EASL School of Hepatology on “Metabolic liver diseases” held from 28-30 May 2010, in Turino, Italy
• UEGW / WCOG International Scholarship for the GASTRO 2009, London, UK.
• EASL Registration Bursary, for the International Liver Congress 2009, 44th Annual Meeting of the European Association for the Study of the Liver, 22-26 April 2009, Copenhagen, Denmark
• Stokes Gold Medal for Best Results at MD (Medicine) - 2007, Postgraduate Institute of Medicine, University of Colombo, Sri Lanka
• JB Pieris award for the winner of the Neurology Quiz – 2007, Ceylon College of Physician, Sri Lanka
• Rajasuriya Prize for Clinical Medicine – 2001
• The Rockwood Gold Medal for Surgery – 2001
• Professor K Rajasurioya Prize for History of Medicine – 2001
• Joseph Nalliah Arumugam Memorial Award for Final MBBS – 2001
• The Sir Andrew Caldecott Gold Medal for Final MBBS - 2001, Faculty of Medicine, University of Colombo, Sri Lanka
• MVP Peiris Award for Surgery – 2001, College of Surgeons, Sri Lanka

FELLOWSHIPS:

• Fellow of the Royal College of Physicians May 2018 (FRCP)
• Membership of the Royal College of Physicians November 2010 (MRCP)
• Sri Lanka Medical Association
• Ceylon College of Physicians
• Sri Lanka Society of Gastroenterology
• Hepatobiliary Pancreatic Association of Sri Lanka
• American Gastroenterology Association
• American Society of Gastrointestinal Endoscopy American Association for the Study of Liver Disease

• Niriella , A. Kasturiratna , S. De Silva , R. Perera , C. Subasinghe , K. Kodisinghe , C. Piyarathna , V. Rishikeshavan , A. Dassanayake , A. De Silva , A. Pathmeswaran , N. Kato , J. de Silva "Population- A Community Cohort follow-up Study" 23rd United European Gastroenterology Week Barcelona 2015: 25.
• Niriella, M. A., A. Hapangama, H. P. Luke, K. Withanaarachchi, A. Pathmeswaran, K. A. Kuruppuarachchi, and H. J. de Silva. "Prevalence of hepatitis B and hepatitis C infections and their relationship to injectable drug use in a cohort of Sri Lankan prison inmates.The Ceylon medical journal 60, no. 1 (2015): 18-20.
• Siriwardana, Rohan C., Maduni A. Niriella, Anuradha S. Dassanayake, Chandika Liyanage, Bhagya Gunathilaka, Subani Jayathunge, and Hithanadura J. de Silva. "Clinical characteristics and outcome of hepato-cellular carcinoma in alcohol related and cryp-togenic cirrhosis: a prospective study." (2015) Hepatobiliary Pancreat Dis Int
• De Silva, Shamila T., Ruwan P. Perera, Madunil A. Niriella, Arunasalam Pathmeswaran, and Hithanadura Janaka de Silva. "Frequency, pattern and short-term outcome of chronic renal dysfunction in patients with cirrhosis: a prospective study using HRS and ADQI-IAC criteria."European Journal of Gastroenterology & Hepatology (2014).
• Silva H, Siriwardana RC, Niriella MA, Dassanayake AS, Liyanage CAH, Gunathilake B, de Silva HJ. Nonalcoholic fatty liver disease among potential live liver donors-a preliminary experience from Sri Lanka. Indian Journal of Gastroenterology 2014; 2014 Jun 3. [Epub ahead of print]:
• Wijewantha HS, de Silva AP, Niriella MA, Wijesinghe N, Waraketiya P, Kumarasena RS, Dassanayake AS, Hewawisenthi JdeS, de Silva HJ. Usefulness of routine terminal ileoscopy and biopsy during colonoscopy in a tropical setting: a retrospective record-based study.Gastroenterology Research and Practice 2014; 2014: 343849.
• Ranawaka CK, Miththinda JK, Senanayake SM, de Alwis WR, Mufeena MN, Niriella MA, Dassanayake AS, de Silva AP, Pathmeswaran A, de Silva HJ. Validation of the Sinhala version of the Chronic Liver Disease Questionnaire(CLDQ) for assessment of health related quality of life among Sri Lankan cirrhotics. The Ceylon Medical Journal 2013; 58(4): 156-62.
• Senanayake SM, Fernandopulle AN, Niriella MA, Wijesinghe NT, Ranaweera A, Mufeena MN, Pathmeswaran A, Navarathne NM, de Silva AP, de Silva HJ. The long-term outcomes of a cohort of Sri Lankan patients with ulcerative colitis: a retrospective study at two national referral centers and review of literature. Clinical and Experimental Gastroenterology 2013; 6: 195-200.
• Siriwardana RC, Niriella MA, Liyanage CAH, Wijesuriya SRE, Gunathilaka B, Dassanayake AS, de Silva HJ. Cryptogenic cirrhosis is the leading cause for listing for liver transplantation in Sri Lanka. Indian Journal of Gastroenterology 2013; 32(6): 397-99.
• Senanayake SM, Niriella MA, Weerasinghe SK, Kasturiratne A, de Alwis JP, de Silva AP, Dassanayake AS, de Silva HJ. Survival of patients with alcoholic and cryptogenic cirrhosis without liver transplantation: a single center retrospective study. BMC Research Notes 2012; 2(5): 663.
• Dassanayake AS, Kasturiratne A, Niriella MA, Kalubowila U, Rajindrajith S, de Silva AP, Kato N, Wickremasinghe AR, de Silva HJ. Prevalence of Acanthosis Nigricans in an urban population in Sri Lanka and its utility to detect metabolic syndrome. BMC Research Notes 2011; 28;4(1): 25.
• de Silva AP, Kumarasena RS, Keragala SDP, Kalubowila U, Niriella M, Dassanayake AS, Pathmeswaran A, de Silva HJ. The Prone 12 o'clock position reduces ileal intubation time during colonoscopy compared to the left lateral 6 o'clock (standard) position. BMC Gastroenterology 2011; 4;11: 89.
• de Silva AP, Niriella MA, Perera H, Aryasingha S, Kalubowila U, Manchanayake J, Dassanayake AS, Devanarayana NM, Pathmeswaran A, de Silva HJ. Is a six hour fast after a rice meal sufficient before upper gastrointestinal endoscopy? Scandinavian Journal of Gastroenterology 2010; 45(7-8): 987-91.
• Kumarasena RS, Niriella MA, Kalubowila U, de Silva AP, Dassanayake AS, de Silva, HJ. Bleeding from oesophageal ulceration induced by endoscopic variceal ligation for primary prophylaxis.Gut 2010; 59(11): 1586. [Epub 2010 Aug 30].
• Niriella MA, de Silva AP, Dayaratne AHGK, Ariyasinghe MHADP, Navarathne MMN, Peiris RSK, Samarasekara D, Satarasinghe RL, Rajindrajith S, Dassanayake AS, Wickramasinghe AR, de Silva HJ. Prevalence of inflammatory bowel disease in two districts of Sri Lanka: a hospital based survey. BMC Gastroenterology 2010; 10: 32.
• Premaratna R, Nawasiwatte BMTP, Niriella MA , Chandrasena TGAN, Bandara NKBKRGW, Rajapakse RP, de Silva HJ. Scrub typhus mimicking enteric fever : a report of three patients. Transactions of th e Royal Society of Tropical Medicine and Hygiene 2010; 104(4): 309 - 10. [Epub 2009 Sep 17].