• Vector borne infections; Lymphatic Filariasis, Malaria Rickettsial infections
• Intestinal Parasitic Infections, Rotavirus infection

• Chairperson / Introductory module (Phase II)
• Secretory / Skin and Locomoter system (Phase II)

• Contributed to authoring the recommended study Guides for students following the M.Sc. in Medical Entomology and Applied Parasitology offered by the Dept. of Zoology, Faculty of Natural Sciences, The Open University of Sri Lanka. Publisher -Open University of Sri Lanka
  “Clinical Aspects of Diseases Transmitted by Mosquitoes and other Dipteran Flies”  
  “Clinical Aspects of Diseases transmitted by Lice, Fleas, Bugs, Ticks and other arthropods” 

• Nilmini T.G.A. Chandrasena, Ranjan Premaratna , Chandana H. Mallawarachchi , Dinesh G.A.M. Gunaratna and Nilanthi R. de Silva Lymphatic filariasis in the Southeast Asian region; status and control options. CAB Reviews 2020; 15 (059). doi: 10.1079/PAVSNNR202015059 
• N Gunathilaka, N Chandrasena, T Wijerathna, Y Fuji, D Gunasekara, Ruwan Prasanna Gunatilaka, Ranjan Premaratna.Descriptive Investigation of Strongyloidiasis Infection and Characterization of Strongyloides stercoralis Using Morphological and Molecular-Based Methods 
  Case Reports in Infectious Diseases 2020.
• CH Mallawarachchi, N Chandrasena, NK Gunawardena. Strongyloidiasis in Kidney Transplant Recipient. 2020. Volume 5; article 1848.Annals of Clinical Case Reports, Nephrology.
• N. D. A. D. Wijegunawardana, Y. I. N. Silva Gunawardene, W. Abeyewickreme, T. G. A. N. Chandrasena, R. S. Dassanayake, A. Manamperi. Optimization of Aedes albopictus rearing procedures for combined sterile insect techniques (SIT) and Wolbachia-based laboratory studies in Sri Lanka. 2020. International Journal of Tropical Insect Science https://doi.org/10.1007/s42690-020-00134-7.
• N Gunathilaka, K Ranasinghe, D Amarasinghe, W Rodrigo, H Mallawarachchi, N Chandrasena. Molecular Characterization of Culturable Aerobic Bacteria in the Midgut of Field-Caught Culex tritaeniorhynchus, Culex gelidus, and Mansonia annulifera Mosquitoes in the Gampaha District of Sri Lanka. BioMed Res Int.  2020 October, Article ID 8732473,:doi.org/10.1155/2020/8732473.
• Chandrasena TGAN, Premaratna R, Mallawaarachchi CH, Gunawardena NK, Gunathilaka PADHN, Abeyewickrama WY, de Silva NR. The Diversity of Human Dirofilariasis in Western Sri Lanka. Biomed Res Int. 2019 Apr 18;2019:9209240. doi: 10.1155/2019/9209240. eCollection 2019
• Gunathilaka N, Chandrasena N, Udayanga L. Prevalence of Ectoparasitic Infections and Other Dermatological Infections and Their Associated Factors among School Children in Gampaha District, Sri Lanka. Can J Infect Dis Med Microbiol. 2019 Mar 25;2019:5827124. doi: 10.1155/2019/5827124
• NDAD Wijegunawardana, YIN Silva Gunawardene, TGAN Chandrasena, RS Dissanayake, NBAL Udayanga, W Abewickreme. Evaluation of the Effects of Aedes Vector Indices and Climatic Factors on Dengue Incidence in Gampaha District, Sri Lanka. BioMed Research International 2019. https://doi.org/10.1155/2019/2950216
• CH Mallawarachchi, TGAN Chandrasena, S Wickramasinghe, R Premaratna, NYIS Gunawardane, NSMS M Mallawarachchi, NR de Silva. A preliminary survey of filarial parasites in dogs and cats in Sri Lanka PLoS One. 2018 Nov 2;13(11):e0206633. doi: 10.1371/journal.pone.0206633. eCollection 2018.
• Yahiro T, Takaki M, Chandrasena TGAN, Rajindrajith S, Iha H, Ahmed K Human-porcine reassortant rotavirus generated by multiple reassortment events in a Sri Lankan child with diarrhea.
  Infect Genet Evol. 2018 Jul 26;65:170-186. doi:10.1016/j.meegid.2018.07.014.
  Chandrasena N, Premaratna R, Gunaratna IE, de Silva NR Morbidity management and disability prevention for lymphatic filariasis in Sri Lanka: Current status and future prospects. 
  PLoS Negl Trop Dis. 2018 May 10;12(5):e0006472. doi: 0.1371/journal.pntd.0006472. eCollection 2018 May
• Mallawarachchi CH, Nilmini Chandrasena TGA, Premaratna R, Mallawarachchi SMNSM, de Silva NR. Human infection with sub-periodic Brugia spp. in Gampaha District, Sri Lanka: a threat to filariasis elimination status? 
  Parasit Vectors. 2018 Jan 29;11(1):68. doi: 10.1186/s13071-018-2649-3
• Premaratna R, Blanton LS, Samaraweera DN, de Silva GN,Chandrasena NT, Walker DH, de Silva HJ. Genotypic characterization of Orientia tsutsugamushi from patients in two geographical locations in Sri Lanka. BMC Infect Dis. 2017 Jan 13;17(1):67. doi: 10.1186/s12879-016-2165-z
• Premaratna R, Luke N, Perera H, Gunathilake M, Amarasena P, Chandrasena TG Sporadic  cases of adult measles: a research article. BMC Res Notes. 2017 Jan 10;10(1):38. doi: 10.1186/s13104-017-2374-6.
• ChandrasenaNT, Premaratna R, Samarasekera DS, de Silva NR. Surveillance for transmission of lymphatic filariasis in Colombo and Gampaha districts of Sri Lanka following mass drug administration.  Trans R Soc Trop Med Hyg. 2016 Nov 5
• Chandrasena N,Herath R, Rupasinghe N, Samarasinghe B, Samaranayake H, Kastuririratne A, de Silva NR. Toxoplasmosis awareness, seroprevalence and risk behavior among pregnant women in the Gampaha district, , Sri Lanka. Pathogens and global health. 2016; 110(2): 62-67.
• P Balasooriya, NB Bandara, T Chandrasena, R Premaratn Rickettsial disease IFA-IgG titres in auto-immune diseases: What do they imply? Intl J Infect Dis, 2016; 54: Suppl 1,  59-60. 
• Premaratna, Ranjan, Nimalka Ariyaratna, Champaka Attanayake, Wijesinghe Bandara, Nilmini Chandrasena, and Janaka de Silva. "Rickettsial infection among military personnel deployed in Northern Sri Lanka." BMC infectious diseases 14, no. 1 (2014): 688.
• Gunawardena NK, Chandrasena TN, de Silva NR. Prevalence of enterobiasis among primary school children in Ragama, Sri Lanka. The Ceylon Medical Journal 2013; 58(3): 106-10.
• Mitui MT, Chandrasena TGAN, Chan PKS, Rajindrajith S, Nelson EAS, Leung TF, Nishizono A, Ahmed K.Inaccurate identification of rotavirus genotype G9 as genotype G3 strains due to primer mismatch. Virology Journal 2012; 9: 144.   
• Premaratna R, Weerasinghe S, Ranaweera A, Chandrasena, TGAN, Bandara NW, Dasch GA, de Silva HJ.Clinically helpful rickettsial disease diagnostic IgG titers in relation to duration of illness in an endemic setting in Sri Lanka. BMC Research Notes 2012; 5: 662.
• Rodrigo KMDJ, Premaratna R, Chandrasena TGAN, de Silva N, de Silva HJ. Marked eosinophilia due to intestinal strongyloidiasis in an immunocompetent patient. The Ceylon Medical Journal 2012; 57(4): 172-173.
• Premaratna R, Galappaththy G, Chandrasena TGAN, Fernando R, Nawasiwatte BMTP, de Silva NR, de Silva HJ .What clinicians who practice in countries reaching Malaria Elimination, should they be aware of: lessons learnt from recent experience in Sri Lanka. Malaria Journal 201 1 ; 10: 302.
• Premaratna R, Halambarachchige LP, Nanayakkara DM, Chandrasena TGAN, Rajapakse RPVJ, Bandara NKBKRGW, de Silva HJ . Evidence of acute rickettsioses among patients presum ed to have Chikungunya fever during the Chikungunya outbreak in Sri Lanka. International Journal of Infectious Diseases 2011 ; 15: e871 - e873.
• Chandrasena TGAN, Gunawardena NK, Premaratna R, de Silva NR. Ultrasonographic visualisation of live Wuchereria bancrofti adult worms in situ . The Ceylon Medical Journal 2011; 56(2): 82-3.
• Chandrasena TGAN, Balasooriya BADH, Imbulpitiya IVB, de Silva NR . A survey for intestinal parasites in a psychiatric institution in Sri Lanka . Annals of Tropical Medicine and Parasitology , 2010; 104 (7) 605 - 608 .
• Premaratna R, Nawasiwatte BMTP, Niriella MA, Chandrasena TGAN, Bandara NKBKRGW, Rajapakse RPVJ, de Silva HJ. Scrub typhus mimicking enteric fever; a report of three patients .Transactions of the Royal S ociety of Tropical Medicine and Hygiene 2010; 104: 309 - 310.
• Premaratna R, Rajapakse RPVJ, Chandrasena TGAN, Bailey MS, Kularatna SAM, Eremeeva ME, Dasch GA, de Silva HJ . Contribution of Rickettsioses in a selected group of patients with fever who responded to empirical doxycycline treatment.Transactions of the Royal Society of Tropical Medicine and Hygiene 2010; 104: 368 - 370.
• Rotavirus with multiple emerging genotypes in Sri Lanka . Ahmed K , Batuwanthudawe R, Chandrasena TGAN, Mitui MT, Rajindrajith S , Galagoda G, Pun SB, Uchida R, K unii O, Moji K, Abesinghe N, Nishizono A, Nakagomi O. Achieves of Virology 2010;155:71 – 7
• Hospital - based study of the severity and economic burden associated with rotavirus diarrhea in Sri Lanka Nilmini Chandrasena , Shaman Rajindrajith , Ahmed Kamruddin, Arunachalam Pathmeswaran, Osamu Nakagomi. Journal of Pediatric Infectious Diseases 2009; 4: 379 – 386
• Premaratna R, Williams HSA, Chandrasena TGAN, Rajapakse RPVJ, Kularatna SAM, de Silva HJ. Unusual Pancytopenia secondary to haemophagocytosis syndrome in Rickettsioses.Transactions of the Royal Society of Tropical Medicine and Hygiene 2009; 103: 961-963.
• Premaratna R, Chandrasena TGAN, Rajapakse RPVJ, Eremeeva ME, Dasch GA, Bandara NKBKRGW,de Silva HJ.Rickettsioses presenting as major joint arthritis and erythema nodosum: description of four patients. Clinical Rheumatology 2009 28: 867-868.
• Premaratna R., Loftis A.D., Chandrasena T.G.A.N., Dasch G.A, de Silva H.J. Rickettsial infections and their Clinical Presentations in Western Province of Sri Lanka: A hospital Based study .Int J Infect Dis. 2008 Mar;12(2):198-202. Epub 2007 Sep 27.
• Chandrasena TGAN, Hapuarachchi HC, Dayanath MYD, Pathmeswaran A, de Silva NR. Intestinal parasites and the growth status of internally displaced children in Sri Lanka. Tropical Doctor, 2007; 37: 163 – 165
• Chandrasena, TGAN, Premaratna R, Muthugala MARV, Pathmeswaran A, de Silva NR. Modified Dermatology Life Quality Index as a measure of quality of life in patients with filarial lymphoedema.Transactions of the Royal Society of Tropical Medicine & Hygiene 2007; 101 (3) 245 – 249
• Premaratne R, Chandrasena TGAN, Dassanayake AS, Loftis AD, Dasch GA, de Silva HJ.Acute hearing loss due to scrub typhus: a forgotten complication of a reemerging disease.Clinical Infectious Diseases 2006; 42: e6-8 (Epub 2005)
• Chandrasena TGAN, Premaratna R, de Silva NR. Lymphoedema management knowledge and practices among patients attending filariasis morbidity control clinics in Gampaha District, Sri Lanka. Filaria Journal 2004; 3 (6) 1 – 6.
• Chandrasena TGAN, de Alwis ACD, de Silva LDR, Morel RP, de Silva NR. Intestinal parasitoses and the nutritional status of Veddah children in Sri Lanka. South East Asian Journal of Tropical Medicine and Public Health 2004; 35 (2) 255 – 259
• Premaratna, R, Chandrasena TGAN, Abeyewickreme W, Chandrasena LG, Senarath S, de Silva NR, de Silva HJ. Red blood cell antioxidant levels in Wuchereria bancrofti infection. Experimental Parasitology 2003 ; 102 : 81 – 88
• Chandrasena TGAN, Premaratna R, Abeyewickreme W, de Silva NR. Evaluation of the ICT whole-blood antigen card test to detect infection due to Wuchereria bancrofti in Sri Lanka. Transactions of the Royal Society of Tropical Medicine & Hygiene 2002; 96: 60 – 63. 
• de Silva NR, Abeyewickreme W, Chandrasena TGAN. Sleeping sickness and     medical students (letter) Ceylon Medical Journal 2000; 45: 39

• Ashani, M. L. S, Chandrasena, T. G. A. N, Gunathilaka, P.A.D.H.N, Premaratna,B.A.H.R., Community awareness survey on Rickettsial infections (Typhus fever) in Batapola: A high endemic area in Galle District, Sri Lanka, Proceedings of International Research Conference 2020, Sir General Jhon Kotalawela Defense University, 15-16^th October 2020.
• Rathnayake SP, Mallawarachchi CH, De Silva LAPNF, Gunathilaka PADHN, Chandrasena TGAN. Filarial parasites among two dog communities in selected filariasis endemic and non-endemic areas in Sri Lanka. (Poster presentation) 29th Annual Scientific Session of The Sri Lanka College of Microbiologists. August 2020.
• Ashani, M.L.S, Chandrasena, T.G.A.N, Gunathilaka, P.A.D.H.N, Premaratna,B.A.H.R., Awareness of Rickettsial infections (Typhus fever) in a high endemic community in Hambantota District, Sri Lanka, Proceedings of 19th International Congress on Infectious Diseases (ICID), Malaysia, 20-23^rd February 2020.
• Ashani, M. L. S, Chandrasena, T. G. A. N, Gunathilaka, P.A.D.H.N, Premaratna,B.A.H.R., Potential zoonotic hosts and vectors of scrub typhus in Sri Lanka; a preliminary report, Proceedings of 20th Conference on Postgraduate Research,30th December,2019,(p,46).
• Mallawarachchi CH, Gunathilaka PADHN,Wijerathna T, Lahiru NWBAL, Mallawarachchi SMNS, Chandrasena TGAN. A preliminary report on a newly emerging focus of cutaneous leishmaniasis in Gamapaha district Sri Lanka. Presented at the International Conference On Health Sciences-2019 University of Sri Jayawardenepura, Sri Lanka (Poster presentation)
• Mallawachchi CH, Chandrasena TGAN, Premaratna R, Gunawardane NYIS, Mallawarachchi SMNS, de Silva NR. The re-emergent species Brugia species in Sri Lanka identified as a novel strain of malayi with a close nucleotide homology to B.pahangi.  oral presentation  at the 11^th European Congress on Tropical Medicine and International Health in September 2019 at Liverpool, UK (turbotalk). Abstract published in Transactions of the Royal Society of Tropical Medicine and Hygiene 2019 Sept. vol 113 p58-59.
• Mallawachchi CH, Chandrasena TGAN, Premaratna R, Gunawardane NYIS, Mallawarachchi SMNS, de Silva NR. A novel strain of Brugia malayi with a close homology to Brugia pahangi from Sri Lanka. 28^th Annual Scientific sessions of the Sri Lanka College of Microbiologists 2019 ral presentation). Published in The Bulletin of the Sri Lanka College of Microbiologists Volume 17, Page-17, Issue-ISSN
• N.D. A. D. Wijegunawardana, W. Abeyewickreme, Y. I. Nilmini Silva Gunawardene, R. S. Dasannayaka, N. Chandrasena, K. Bourtzis, Z. Xi (2018).Integration of Wolbachia infection and irradiation to obtain sterile male mosquitoes of Aedes albopictus to be used in integrated vector control in Sri Lanka. Proceedings of the 74^th Annual Sessions of the Sri Lanka Association for Advancement of Science, Sri Lanka (2^nd December 2018).
• N.D. A. D. Wijegunawardana, W. Abeyewickreme, Y. I. Nilmini Silva Gunawardene, R. S. Dasannayaka, N. Chandrasena, K. Bourtzis, Z. Xi (2018).The potential use of a combined sterile insect technique (SIT) and Wolbachia-based approach for the control of the dengue vector Aedes albopictus in Sri Lanka.  Proceedings of the 19^th International Post-graduate Research Sessions, University of Kelaniya, Sri Lanka (5^th December 2018).
• Mallawarachchi C.H, Chandrasena T.G.A.N, Mallawarachchi S.M.N.S. M., Gunarathne D, de Silva N. R. Detection of a case of Brugian filariasis from Anuradhapura, a non-endemic district of Sri Lanka. Annual scientific sessions of the Sri Lanka Medical Association 2018.
• Mallawarachchi C.H, Chandrasena TGAN, Mallawarachchi SMNSM, Gunarathne GAMD, De Silva NR. Geospatial analysis of the distribution of re-emerged brugian filariasis in Gampaha District, Sri Lanka, to characterize environmental and climatic risk factors of transmission. Asia Pacific Travel Health, Bangkok, 2018
• Mallawarachchi C.H, Chandrasena TGAN, Mallawarachchi SMNSM, Gunarathne GAMD, De Silva NR Distribution of brugian filariasis in the Gampaha district. National Health Research Symposium 2017, Colombo. Oral presentation
• Mallawarachchi C.H, Chandrasena T.G.A.N, Wickramasinghe S., Samarasinghe S,D. Mallawarachchi S.M.N.S. M., de Silva NR. Detection of zoonotic filarial infection in cats and dogs in selected areas of Sri Lanka: a possible threat to general public.Proceedings of the    Peradeniya University International Research Sessions,    Sri Lanka,  November, 2017. Volume 21, Pages 328-329      ISSN 1391-4111 ISBN 978-955-589-240-7 (Oral presentation)
• Mallawarachchi C.H, Chandrasena T.G.A.N, Samarasekara D., Mallawarachchi S.M.N.S.M., de Silva NR. Brugian filariasis in selected areas in Gampaha district, Sri Lanka . Proceedings of the    Peradeniya University International Research Sessions, Sri Lanka,  November, 2017. Poster presentation.
• C.H. Mallawarachchi, T.G.A.N. Chandrasena, S.D. Samarasekara, S.M.N.S. M. Mallawarachchi, N.R. de Silva. Brugian filariasis in Sri Lanka: a preliminary report on survey in Gampaha District presented at the 26th Annual Scientific Sessions of the Sri Lanka College of Microbiologist, Colombo and at the 10^th European Congress on Tropical Medicine and International Health in October 2017. Abstracts published in the The Bulletin of the Sri Lanka College of Microbiologists. Volume 15, 2017 and Tropical Medicine and International Health 2017 Oct .22; suppl. 2 P27, pp153.
• C.H. Mallawarachchi, T.G.A.N. Chandrasena, S. Wickramasinghe, S.D. Samarasekara, S.M.N.S. M. Mallawarachchi, N.R. de Silva. Filarial parasites in selected cats and dogs in Madampe, Sri Lanka, and their public health implications. Presented at the 26th Annual Scientific Sessions of the Sri Lanka College of Microbiologist, Colombo. Abstract published in theThe Bulletin of the Sri Lanka College of Microbiologists. Volume 15, 2017
• C.H. Mallawarachchi, T.G.A.N. Chandrasena, S. Wickramasinghe, S.D. Samarasekara, S.M.N.S. M. Mallawarachchi, N.R. de Silva.Filarial parasites in selected cats and dogs represent a Public Health Problem in Madampe, Sri Lanka. presented at the 10^thEuropean Congress on Tropical Medicine and International Health in October 2017. Abstract published in theTropical Medicine and International Health 2017 Oct .22; suppl. 2 P26, pp153.
• N. D. A. D. Wijegunawardana, N. Gunathilaka, W. Abeyewickreme, Y. I.   Gunawardene, R. S. Dasannayaka, N. Chandrasena, P. Kittayapong, K. Bourtzis, Z. Xi (2017Potential use of a combined sterile insect technique (SIT) and Wolbachia-based (Wb) approach for the control of the dengue vector Aedes albopictus in Sri Lanka.). Proceedings of the Sri Lanka Academy of Young Scientist 3MT Forum at the Hilton Residencies, Colombo in 1^st of March, 2017. 1 (1), pp 89-90
• N. D. A. D. Wijegunawardana, N. Gunathilaka, W. Abeyewickreme, Y. I. Nilmini Silva Gunawardene, R. S. Dasannayaka, N. Chandrasena, P. Kittayapong, K. Bourtzis, Z. Xi Screening for Wolbachia infection in mosquito and other insect populations in Ragama, Sri Lanka. (2017) presented at the Third FAO/IAEA International Conference on Area-wide Management of Insect Pests: Integrating the Sterile Insect and Related Nuclear and Other Techniques (22 - 26 May 2017) at the IAEA Headquarters, in Vienna, Austria
• A. Wijegunawardana, N Gunathilaka, L Udayanga, N Gunawardene, R Dissanayake, N. Chandrasena, KK Bourtxis, W. Abeywickreme.A preliminary community survey of selected Dengue patient households in the Ragama MOH, Gampaha District. (2016) International Postgraduate Research Conference 2016, University of Kelaniya
• T.G. A. N. Chandrasena, R. Premaratna, S. D. Samrasekera, K. A. A. S. Kuruppu  N. R. de Silva. Post–MDA surveillance for transmission of lymphatic filariasis in the Colombo and Gampaha districts of Sri Lanka. Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, November, 2016.
• N.D. A. D. Wijegunawardana, N. Gunathilaka, Y. I. Nilmini Silva Gunawardene, R. S. Dasannayaka, N. Chandrasena, P. Kittayapong, Zhiyong Xi, K. Bourtzis, W. Abeyewickreme Prevalence of Wolbachia infection in mosquito population in Sri Lanka. 
  Proceedings of the Peradeniya University International Research Sessions, Sri Lanka 2016.
• Gunawardane N, K, Mujeeb I M , Chandrasena T G A N, Moulana S H B M A A, Withanage S, Mahanama L S , Jayakody N K, de Silva N R. Enterobiasis in the Western and Eastern provinces of Sri Lanka (2016) 25 ^th Annual Scientific Sessions. The Sri Lanka College of Microbiologists, August 2016.
• N.D. A. D. Wijegunawardana, Y. I, N. Silva Gunawardene, T. G. A. N. Chandrasena, R. S. Dassanayake, T. Ruanareerate, P. Kittayapong, W. Abeyewickreme. Maternal transformation of Wolbachia isolated from infected mosquito hosts to Aedes aegypti using micro-injection-based procedure: an approach towards integrated dengue vector control. 
  Proceedings of the Symposium on current research activities on dengue organized by the Molecular Medicine Unit, Faculty of Medicine, University of Kelaniya (13^th November, 2015) pp 28-29
• NDAD Wijegunawardana, YIN Silva Gunawardene, TGAN Chandrasena, RS Dassanayake, PADHN Gunathilaka, Abeyewickreme W. Determination of appropriate positioning of the ovitraps for dengue mosquito surveillance. International Postgraduate Research Conference 2015 of the Faculty of Graduate Studies, University of Kelaniya, Sri Lanka
• TGAN Chandrasena, Rasika Herath, JIN Rupasinghe, SADBP Samarasinghe, WWSRMH Samaranayake Toxoplasmosis awareness, seroprevalence and risk behaviours among pregnant females in the Gampaha district Sri Lanka. 24^th Annual Scientific Session. The Sri Lanka College of Microbiologists.August 2015
• TGAN Chandrasena, Rasika Herath, JN Rupasinghe, SABP Samarasinghe, WWBRMH Samaranayake. Awareness, risk behaviours and seropositivity of toxoplasmosis among pregnant females in the Gampaha District, Sri Lanka.
  FIGO-SAFOG-SLCOG Joint Conference, October 2014, Colombo
• Minako Takaki, Nilmini Chandrasena, Shaman Rajindrajith, Kithsiri Gunawardena, Akira Nishizono , Kamruddin Ahmed. Molecular characterization of a porcine rotavirus detected in a Sri Lankan child with acute diarrhea. ASEAN Congress of Tropical Medicine and Parasitology 2014 Malasia
• Chandrasena TGAN, Rajindrajith S., Gunawardana NK., Liyanarachchi N., Abesekara CK., Matsomoto T., Yahiro T., Nishizono A. Ahmed K. Surveillance of rotavirus in three hospital settings of Sri Lanka, 2007-2010. 23^rd Annual Scientific Session. The Sri Lanka College of Microbiologists. August 2014
• Prematarna R., Blanton L., Samaraweera DN., de Silva GNN, Kumara TADN, Liyanarachchi MS, Weerasinghe M., Gunasekara C., Chandrasena TGAN., Walker D., de Silva HJ. Genetic sequencing of the 56- kDA surface protein antigen gene of Orientia tsutsugamushi causing contemporary human scrub typhus at two sites in Sri Lanka. Presented at the 127^th Annual Scientific Sessions of the Sri Lanka Medical Association, Colombo 2014, OP29, Ceylon Medical Journal 2014; 59(Supplement 1)-22.
• Minako Takaki, Nilmini Chandrasena, Shaman Rajindrajith, Kithsiri, Akira Nishizono, Kamruddin Ahmed. Detection of a porcine rotavirus in a child with acute diarrhoea in Sri Lanka. Annual Academic Sessions of the Sri Lanka Medical Association, July 2013
• R Premaratna, KAW Karunasekara, MAM Fernando, Lde Silva, TGN Chandrasena, HJ de Silva. Clinical characteristics of paediatric rickettsioses. Annual Academic Sessions of the Sri Lanka Medical Association, July 2013 PP18 page 47.
• R.Premaratna, KAW Karunasekara, MAM Fernando, Lde Silva, TGAN Chandrasena, HJ de silva, JKND Miththinda, MNF Mufeena, KSK Madeena, NKBKRGW Bandara Comparison of clinical and laboratory parameters between Rickettsiosis positive and negative children.. Annual Academic Sessions of the Sri Lanka Medical Association, July 2013
• Gunawardena NK, Chandrasena TGAN, Senarathna BP, Silva GMSK, de Silva NR. Prevalence of enterobiasis among primary school children in Ragama MOH area. 21st Annual Sessions of the Sri Lanka College of Microbiologists, Colombo Sept 2012, p 10
• Chandrasena TGAN, Rajindrajith Shaman ^, Gunawardena NK, Silva,GMSK , Pathmeswaran A , Kazuhiko Moji, Kamruddin Ahmed. Effect of genotyping on the severity of rotavirus gastroenteritis. The 14^th Annual Scientific Congress of the Sri Lanka College of Paediatricians 2011 and 25^th Anniversary Conference, Institute of Child Health London July 2011.
• Premaratna R., Weerasinghe MGSK, Ranaweera AGRMA, Chandrasena TGAN, Bandara NKBKRGW, Dasch GA, de Silva HJ. Rickettsial disease diagnostic IgG titres in relation to duration of illness in an endemic setting in Sri Lanka. 6^th International Meeting on Rickettsiae and Rickettsial Diseases, Heraklion, Crete. June 2011.
• N K Gunawardena, Shaman Rajindrajith, T G A N Chandrasena, Akira Nishizono, Kazuhiko Moji, Kamruddin Ahmed . Spatial Epidemiology and hotspots of rotavirus in children: An analysis and mapping using geographical information system Proceedings of the 13 th Annual Scientific Congress of the Sri Lanka     College of Paediatricians,  July 2010
• T G A N Chandrasena, Shaman Rajindrajith, N K Gunawardena, Akira Nishizono, Kazuhiko Moji, Kamruddin Ahmed. Rotavirus surveillance at the North Colombo Teaching Hospital, Sri Lanka, 2007-2008     Proceedings of the 13 th Annual Scientific Congress of the Sri Lanka College of Paediatricians, July 2010.
• Premaratna R,Chandrasena TGAN, Bandara NKBKRGW, Rajapakse RPVJ, Ariyaratne NK, Kularatna SAM, Eremeeva ME, Dasch GA, de Silva HJ.New serological observations on Rickettsioses in Sri Lanka.. 23^rd Meeting of the of the American Society for Rickettsiology, August 2009, South Caroloina USA
• Chandrasena TGAN, Gunawardane, NK, Imbulpitiya IVB, Balasooriya BADH, Ariyarathna WPH, de Silva NR. Intestinal parasitic infections among a selected group of institutionalised psychiatric patients. Annual Academic Sessions o f the Sri Lanka College of Microbiologists 2009, p 18
• Premaratna R, Chandrasena TGAN,  Bandara NKBKRGW, Rajapakse RPVJ, Nawasiwatte BMTP, Rajeev S, Kulasiri KIR, Liyanage NSH, Kularatna SAM, de Silva HJ Progress report of Rickettsial disease diagnostic and research laboratory (RDDRL), Faculty of Medicine, University of Kelaniya. 122^nd Annual scientific Sessions of the Sri Lanka Medical association, 2009.
• TGAN Chandrasena.,R Premaratna, BMTP Nawasiwatte, K Kulasiri, S. Rajeev, RPVJ Rajapakse, SAM Kularatna, HJ de Silva. Occurrence of tick bites and serological exposure to rickettsioses among Sri Lankan military personnel. International Meeting on Emerging Diseases (IMED) 2009, Vienna, Austria.
• Premaratna R., Dissanayake I., Chandrasena TGAN., Attanayake N., de Silva HJ. Predicted cost benefits of establishment of Rickettsial disease diagnostics in Sri Lanka. 5^th international conference on Rickettsial Diseases and Rickettsiosis, Marseille, France, May 18-22, 2008
• Premaratna R., Chandrasena TGAN., Bailey MS., Lofftis AD., Dasch GA., de Silva HJ A descriptive study of 63 patients with rickettsial infections: reasons for the delay in the diagnosis. 121^st Annual academic sessions of Sri Lanka medical association, March 2008
• Premaratna R, Rajapakse RPVJ, Chandrasena TGAN, Dasch GA, Eremeewa M, de Silva HJ. Aetiology of ‘Pyrexia of unknown origin’ in a selected group of patients who responded to Doxycycline. International Conference of Emerging Infectious Diseases(ICEID)
  March 16-19 2008, Atlanta Georgia, USA.
• Premaratna R, Chandrasena TGAN, Gunawardena NK, de Silva NR , de Silva HJ. Filarial dance sign (FDS) in patients with lymphatic filariasis. 121^st Annual Scientific Sessions of the Sri Lanka Medical Association. Colombo, March 2008, p 21
• Premaratna R., Loftis A.D., Chandrasena T.G.A.N., Dasch G.A, de Silva H.J. Rickettsial Infections and their Clinical Presentations in the Western Province of Sri Lanka: a Hospital Based Study. 21^st Meeting of the American Society of Rickettsiology, Colordo Springs,Colorado, USA September 8 - 11, 2007
• TGAN Chandrasena, S Rajindrajith, R Gunawardane, D Adhihetty, K Ahmed, A Pathmeswaran, O Nakagomi. Projected cost effectiveness of rotavirus vaccination in Sri Lanka. Sri Lanka College of Microbiologists Annual sessions, September 2007.
• Chandrasena TGAN, Rajindrajith S, Ahmed K, Pathmeswaran A, Abeyewicreme A, Nakagomi O. Paediatric rotavirus diarrhoeas in Sri Lanka; a preliminary report. Proceedings of the 12^th Asia Pacific Congress of Paediatrics and 2^nd Asia Pacific Congress Paediatric Nursing, Colombo, Sri Lanka, March 12-15, 2007 and Sri Lanka Medical Association, Annual Sessions, 2007.
• Chandrasena TGAN, Premaratna R, Weerasinghe MMU, Muthugala MARV, Moujooth HMA, de Silva NR . Factors affecting the quality of life of lymphoedema patients in the Western Province of Sri Lanka. 119 th Annual Scientific Sessions of the Sri Lanka Medical Association. Colombo, March 2006, p 29
• Chandrasena TGAN, Premaratna R, de Silva NR . Lymphoedem a management knowledge and practices among patients attending filariasis clinics in the Gampaha District, Sri Lanka. Annual Sessions of the Sri Lanka College of Microbiologists, Colombo, August 2004; pp 18 – 19
• Chandrasena TGAN, Premaratna R, de Silva NR . Lymphoedem a management knowledge and practices among patients attending filariasis clinics in the Gampaha District, Sri Lanka. Annual Sessions of the Sri Lanka College of Microbiologists, Colombo, August 2004; pp 18 – 19
• de Alwis ACD, de Silva NR , de Silva D, Morel R, Chandrasena N, Weerasinghe C. Comparative study of health status of Vedda and Sinhala school children of Mahiyangana. Proceedings of the Sri Lanka College of Paediatricians, Annual Scientific Congress 2001 . Colombo August 2001; p 43
• Premaratna R, Chandrasena TGAN, Abeyewickreme W, de Silva NR , Chandrasena LG, de Silva HJ. Clearance of microfilaraemia and red blood cell glutathione peroxidase (GPX) levels in asymptomatic microfilaraemics after single dose and fourteen days treatment with diethyl car bamazine citrate (DEC). 114^th Anniversary Academic Sessions of the Sri Lanka Medical Association . Colombo March 2001; p24 – 25
• Premaratna R, Chandrasena TGAN, Abeyewickreme W, de Silva NR , Chandrasena LG, de Silva HJ. Red blood cell antioxidant levels after treatment with diethyl carbamazine citrate in persons with asymptomatic microfilaraemia. 114^th Anniversary Academic Sessions of the Sri Lanka Medical Association . Colombo March 2001; p23 – 24
• Chandrasena TGAN, Morel RP, de Alwis C, Sudusinghe HP, de Silva NR . Intestinal parasitic infections in primary school children in Mahiyangana district. Annual Sessions of the Sri Lanka College of Microbiologists, Colombo, 3 June 2000
• Premaratna BAHR, Chandrasena TGAN, Senerath GLCS, Chandrasena LG, de Silva NR . Role of antioxidants in filarial infection. 113^th Anniversary Academic Sessions of the Sri Lanka Medical Association, Colombo March 2000; p 32 – 33
• Chandrasena TGAN, Premarathna BAHR, Abeyewickreme W, de Silva NR . Comparison of methods for diagnosis of Bancroftian filariasis. 113^th Anniversary Academic Sessions of the Sri Lanka Medical Association, Colombo March 2000; p 33

Other (eg newsletters, magazines, etc.)

• Newsletter on Intestinal worm infections in magazine ‘Amma’

• Presidential Award for Scientific research published in 2018 evaluated by peers and rated among the top twenty publications in 2018 (awarded in 2021)
• Presidential Award for Scientific Research published in 2018 evaluated by peers and rated among the top hundred publications in 2018 (awarded in 2021)
• Third prize in the Poster Presentations for the paper titled “filarial parasites in two dog communities in selected filariasis endemic and non-endemic areas in Sri Lanka” at the 29 ^th Annual Scientific sessions in August 2020
• Presidential Award for Scientific Research published in 2017 evaluated by peers and rated among the first 100 publications in 2017 (awarded in 2019)
• National Research Council Merit award for Research Publications in 2016
• National Research Council Merit award for Research Publications in 2014                        
• National Research Council Merit award for Research Publication in 2012             
• Presidential Award for Scientific Research evaluated by peers and published in 2010 (Awarded in 2014)
• Presidential Award for Scientific Research evaluated by peers and published in 2009 (Awarded in 2014)
• Presidential Award for Scientific Research evaluated by peers and published in 2007 (Awarded in 2014)
• Presidential Award for Scientific Research evaluated by peers and published in 2005 (Awarded in 2010)
• Presidential Award for Scientific Research evaluated by peers and published in 2003 (Awarded in 2010)
• Presidential Award for Scientific Research evaluated by peers and published in 2002 (Awarded in 2008)
• M. Wijerama award for the best Scientific paper for the year 2001, Sri Lanka Medical Association sessions March 2001. For a paper titled “Changes in red blood cell antioxidant levels and clearance of microfilaraemia after single dose and fourteen day treatments with diethyl carbamazine citrate in individuals with asymptomatic microfilaraemia”
• Rajasooriya award for best scientific paper in Tropical Medicine at Sri Lanka Medical Association Academic sessions March 2000. For a paper titled“The role of antioxidants in filarial infection”
• Sir Frank Gunasekara award at Sri Lanka Medical Association Academic sessions March 2000. For a paper titled “Comparison of methods for diagnosis of bancroftian filariasis”. Presenting and chief author

• Member of the Post Graduate Institute of Medicine (PGIM)
• Member of the Board of study for Microbiology (2007 - 2009)
• Trainer and Examiner in the MD Medical Parasitology course conducted by the PGIM
• Trainer and Examiner of the Diploma in Medical Microbiology course conducted by the PGIM

• Secretary, Curriculum Committee, Faculty of Medicine University of Kelaniya, 2003-2007
• Head Department of Parasitology, Faculty of Medicine, University of Kelaniya, August 2007 -2010
• Chairperson Phase 2 Introductory module 2010- 2014
• Secretary Phase 2 Introductory module, 2009 – 2010
• Secretary, Phase2 Skin & Locomotor module from 2007- 2009
• Chief Examiner Unit 3 examination 2011- 2013.
• Chief examiner Continuous Assessment 5 in 2009

Teaching and evaluation of undergraduate medical students in the phase 2 Introductory and Alimentary system modules

• Scrub typhus vector identification

• Principle investigator of University of Kelaniya research grant for the study entitled ‘Post MDA surveillance for transmission of lymphatic filariasis in the Western Province of Sri Lanka, a half-time assessment” in 2009 (RP/03/04/06/02/2008)
• Co-investigator of University research grant titled “Awareness of toxoplasmosis, preventive behaviours and seropositivity among pregnant females in the Gamapaha district”in 2013 (RP/03/04/10/01/2013) with research output of one conference paper and one full paper
• Principal investigator of University of Kelaniya research grant under ‘Strengthening research 2016’ for the study entitled ‘:  A Study to determine the presence of zoonotic Brugia malayi in humans, cats and dogs in selected area of Gampaha district, Sri Lanka’ in 2016 (RP/03/SR/04/06/01/2016) on going
• Principal investigator of University of Kelaniya research grant 2018 “Surveillance for potential vectors and associated factors in the transmission of scrub typhus in four selected areas of Sri Lanka”Grant No (RP/03/04/06/02/2018)