K. S. A. Kottawatta

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Dr. K. S. A. Kottawatta

BVSc(Peradeniya),MPhil(Peradeniya),PhD (The University of Hong kong)
Senior Lecturer/Head of the Department
Address:

Department of Veterinary Public Health & Pharmacology,
Faculty of Veterinary Medicine & Animal Science,
University of Peradeniya,
Peradeniya,20400

Contact:

Phone:+94 812395760(office) /+94 714395447
Email: sanda@vet.pdn.ac.lk
sarunika@yahoo.com

  • Awards of the commendable researcher of the year – Faculty of Veterinary Medicine and Animal Science, University of Peradeniya For the Years: 2018, 2021, 2022, 2023.
  • National Awards for Excellence in Agricultural Research – 2017 by Sri Lanka Council for Agricultural Research Policy (CARP), Ministry of agriculture, Sri Lanka.
  • Award of postgraduate studentship from The University of Hong Kong to follow PhD .
  • Awards received for peer reviewed journal articles
    • President’s Award for Scientific Publication For highly rated scientific research published in the year 2014 in Human Reproduction 2014, Vol 29, Iss4, pp750-762.
    • President’s Award for Scientific Publication For highly rated scientific research published in the year 2015 in Fertility and Sterility 2015, Vol 104, Iss 2, pp 474-482.
    • President’s Award for Scientific Publication For highly rated scientific research published in the year 2015 in Biology of Reproduction 2015, Vol 93, Iss 5, Art No.109
    • NRC merit award for scientific publications A merit award for scientific research published 2013 in Applied and Environmental Microbiology 2013, Vol 79, Iss 1, pp 393 – 395
  • Awards received for Abstracts
    • Dr. Keerthi De S A Gunasekara Award The paper entitled,Prevalence and the Predominant Phonotypes of Multi Drug Resistant Escherichia coli in Livestock, Wild Animals and Associated Environment at Kosgama, Sri Lanka by BMYI Basnayake, GGT Nisansala, PIJB Wijewickrama, KWYD Gunasekara, DBN Pushpakumara, NK Jayasekera, AW Kalupahana, RS Kalupahana, S, Silva-Fletcher and KSA Kottawatta was adjudged the best presentation in Veterinary Public Health at the 74th Annual Scientific Sessions of the Sri Lanka Veterinary Association, 2022.
    • Dr. Keerthi De S A Gunasekara Award The paper entitled, Antimicrobial Resistance Profiles of Escherichia coli from Urban Wild Birds in Eastern Wildlife Health Region of Sri Lanka by NGRN Neelawala, DBN Pushpakumara, HMTK Karunarathna, RS Kalupahana and KSA Kottawatta was selected as the best Presentation in Veterinary Public Health at the 71st Annual Scientific Sessions of the Sri Lanka Veterinary Association, 2019.
    • Award for the best scientific paper The paper entitled, Antimicrobial resistance profiles of planktonic and biofilm associated Escherichia coli in poultry layer farms presented by SAIC Subasinghe, HMTK Karunarathna, SP Kodithuwakku, HMHN Bandara, RS Kalupahana, KSA Kottawatta was adjudged the best scientific paper for the year 2017 at the 16th Annual Sessions of the World’s Poultry Science Association held in 2017.
    • Best Paper Award Research Paper Titled,Antimicrobial Resistant, multidrug-resistant and extended spectrum beta lactamase producing Escherichia coli in fresh retail broiler chicken sells at Kurunegala: Municipal Council and Pradeshiya Sabha area and co-authored by A.B.S. Pabasara, P.A.U. Sewwandi, H.C. Gallage, B.M.Y.I. Basnayake, K.S.A. Kottawatta, R.S. Kalupahana was selected as the best paper of the Sustainable Animal Production Technical Session at 7th International Research Conference of Uva Wellassa University August held on 17 – 18, 2023.
    • Dr. Keerthi De S A Gunasekara Award The paper entitled,High Occurrence of Multi-drug resistance among Gram-Negative Bacterial Pathogens in Freshwater Ornamental Fish by DMPM Dhanapala, RS Kalupahana, AW Kaluphana, DPH Wijesekera, KSA Kottawatta, NK Jayasekera, A. Silva-Fletcher, SSS de S. Jagoda was selected as the best presentation in Wildlife & Aquaculture at the 73rd Annual Scientific Sessions of the Sri Lanka Veterinary Association, 2021.
    • Best Paper in Animal Production for the year 2012. The paper entitled, Investigation of Campylobacter, Salmonella, Escherichia coli and Staphylococcus aureus in chicken Meat at Small Scale Retail Shops in Kandy City Limits presented by DS Thilakarathna, KSA Kottawatta, RS Kalupahana and P. Abeynayake was adjudged as the best presentation in Animal production at the 64th Annual Scientific Sessions of the Sri Lanka Veterinary Association, 2012.

  • Undergraduate Teaching at the Faculty of Veterinary Medicine and Animal Science, Faculty of Science University of Peradeniya and Faculty of Animal Science and Export Agriculture, Uva Wellassa University.
  • Area of Teaching
    • Veterinary Public Health: Meat Production and Meat Quality, Poultry Processing, Food Microbiology, Antimicrobial Resistance, Water Quality.
  • Course Co-Ordinator for the Courses at the faculty of Veterinary Medicine and Animal Science: Professional Studies I, Professional Studies II, Integrated Veterinary Sciences V

  • Microbiological safety of animal originated food
  • Bacterial biofilms
  • Antimicrobial Resistance and Extended Spectrum beta Lactamase Producing E. coli (ESBL E. coli)

Year /Period Awarding Body Project Title Status
2025 – 2026 Multidisciplinary Research Grant, University of Peradeniya Prevalence of Methicillin-Resistant Staphylococcus aureus (MRSA) in Poultry, in the Environment, and Colonization in Workers along with their Knowledge, Attitudes, and Practices (KAP) Regarding Food/Meat Handling Procedures in Public Wet Markets within Colombo City Limits: A One Health Study
Co-investigator to the project 		In progress
2024 – 2027 National Agricultural Research Plan (NARP) Use of seaweed supplements (Kappaphycus alvarezi and Sargassum crassifolium) for restoring fertility in dairy cows with endometritis.
Co-investigator to the project 		In progress (1 MPhil Study ongoing)
2023 -2025 University Research Grant,University of Peradeniya Investigation of the extent of Escherichia coli O157:H7 distribution in cattle manure, raw beef and their contaminated wastewater in Kandy district.
Chief Grantee to the project 		Completed 1 MPhil study ongoing)
2020-2021 UKRI Research England The potential role of wildlife in antimicrobial resistance and ecosystem contamination (Under the Bloomsbury SET Knowledge Exchange programme, Royal Veterinary College, University of London, UK and this was a collaborative study with Sri Lanka)
Chief coordinator to the project 		Completed(3 MPhil studies -graduated)
2018 MURF research grant and funded by Massey University, New Zealand The potential role of wildlife in antimicrobial resistance and ecosystem contamination Client compliance and antibiotic prescribing practices of Sri Lankan veterinarians-finding the path of least resistance to prudent antimicrobial stewardship
Collaborator to the project 		Completed(1 MPhil studies -graduated)
2017-2018 University Research Grant, University of Peradeniya Profiling of antimicrobial resistance (AMR) in Planktonic and Biofilm Associated Escherichia coli isolated from commercial layer chicken farms in Kurunegala district of Sri Lanka.
Chief Grantee to project titled 		Completed(1 MPhil studies -graduated)
2017-2018 University Research Grant, University of Peradeniya Evaluation of Anti-microbial effects of Ceylon cinnamon (Cinnamomum zeylanicum ) essential oils on oral biofilms
Collaborator to the project 		Completed

No Student Title of the Thesis Chief/Co Supervisor Degree Remarks
1 Dr. S.A.I.C. Subhasinghe Antimicrobial resistance patterns in planktonic and biofilm forming Escherichia coli associated with selected commercial chicken layer farms in Kurunegala district, Sri Lanka. Chief Supervisor MPhil 2021 Completed
2 Dr. B. M. Y. I. Basnayake Antimicrobial resistance patterns in Escherichia coli isolated from two areas with conventional and commercial livestock farming systems in Sri Lanka Chief Supervisor MPhil 2024 Completed
3 Dr. K.W. M.Y. D. Gunasekara Knowledge, attitudes, and perceptions regarding antibiotic resistance among selected urban and rural communities and antibiotic resistance of coliforms within those ecosystem components: A one health approach Co Supervisor MPhil 2023 Completed
4 Ms. D. Suranimala Establishment of a direct duplex colony polymerase chain reaction detection method to identify Group B Streptococcus colonization in pregnant women Co Supervisor MPhil December 2024 Completed
5 Dr. Lalanthi W. Premaseela De Silva Antimicrobial resistance of Staphylococci spp of canine skin conditions and Escherichia coli associated with canine urinary tract infections and antimicrobial prescription pattern in companion animal practice in Sri Lanka. Co Supervisor MPhil Completed
6 Dr. HC Gallage Analysis of Microbial Quality of Broiler Feeds in Sri Lankan Chief supervisor MPhil Degree Reg. No. MPhil (2019/05) Thesis Writing
7 Dr. N.W.C.H. R. Nanayakkara Investigation of the extent of Escherichia coli O157:H7 distribution in cattle manure, raw beef and their contaminated wastewater in Kandy district Co supervisor MPhil Thesis Writing
8 Dr. D.B.N. Pushpakumara Preliminary Study on antimicrobial resistance of faecal isolates of E. coli and Salmonella in wild animals in Eastern wildlife region of Sri Lanka Co supervisor MSc - 2017(Master of Science in Applied Epidemiology) Completed

Peer reviewed presentations at National/International Conference/Symposia
  • NWHCR Nanayakkara, KSA Kottawatta, RS Kalupahana, SP Keerthani, KGR Abayawansha, HMTK Karunarathna (2025). Establishment of a multiplex Colony PCR (mC-PCR) for detecting E. coli O157:H7. Proceedings of Peradeniya University International Research Symposium and Exposition, Vol 26. 28-29 Aug 2025.
  • NWHCR Nanayakkara, KSA Kottawatta, WMDH Suranimala, SP Keerthani, RS Kalupahana, WAB Wanasinghe and HMTK Karunarathna (2025). Establishment of a multiplex colony PCR (mC-PCR) and detection and profiling of antimicrobial resistance (AMR) of E. coli and E. coli O157:H7 in cattle farms in Kandy District, Sri Lanka. Proceedings of the 77th Annual Scientific Sessions of Sri Lanka Veterinary Assocaition, 22nd August 2025.
  • KKMG Kavindya, PNS Athukoralage, PAU Sewwandi, HMM Thilakshika, KGR Abayawansha, KSA Kottawatta and RS Kalupahana (2025). Occurrence of zoonotic bacterial pathogens in village chickens in the western province of Sri Lanka. Proceedings of the 77th Annual Scientific Sessions of Sri Lanka Veterinary Assocaition, 22nd August 2025.
  • GGSN Nikapitiya, NWHCR Nanayakkara, YK Jayawardana, KSA Kottawatta, DMAP Dissanayaka, GDJM Guluwaththa, HMSC Bandara, SP Kodithuwakku and HMTK Karunarathna (2025) Isolation and molecular characterization of methicillin-resistant Staphylococcus aureus (MRSA) in Kennel dogs, Kandy. Proceedings of the 77th Annual Scientific Sessions of Sri Lanka Veterinary Assocaition, 22nd August 2025.
  • HC Gallage, Ruwani Karunarathna, HMTK Karunarathna, LADE Weerasinghe, S. Samita, RS Kalupahana, KSA Kottawatta (2024). Microbiological quality assessment of the poultry broiler starter feed. Presented at the Peradeniya University International Research Symposium and Exposition (iPURSE 2024), 29th and 30th August, 2024, University of Peradeniya.
  • S.A.J.N.Subhasinghe, N.W.H.C.R.Nanayakkara, T.Karunarathne, S.A.I.C.Subhasinghe and K.S.A.Kottawatta (2024). Effect of Vinegar as a Natural Disinfectant: An In-Vitro Study Done for Planktonic Escherichia Coli. Presented at the Peradeniya University International Research Symposium and Exposition (iPURSE 2024), 29th and 30th August, 2024, University of Peradeniya.
  • N.W.H.C.R.Nanayakkara, A.B.S.Pabasara, S.A.J.N.Subasinghe, W.M.D.H.Suranimala, N.D.Wimalarathna, K.S.A.Kottawatta, R.S.Kalupahana and Thusitha K. Karunarathna (2024). Establishment of a Multiplex PCR to detect E. coli O157:H7. Presented at the 76th Annual Scientific Sessions of the Sri Lanka Veterinary Association, 02nd August 2024, Kandy.
  • T.M.T. Chathumini, A.B.S. Pabasara, R.P.V.J. Rajapakse, D.S. Thilakarathne, K.S.A. Kottawatta, T.S.R. Fernando (2023). Antimicrobial resistance and multi-drug resistance of Escherichia coli and Salmonella in beef production chain and its associated environment in Kandy District, Sri Lanka. National Symposium on Agriculture and Life Sciences’ 24, 5th January 2024.
  • B. M. Y. I. Basnayake, G.G.T. Nisansala, P.I.J.B. Wijewickrama, K.W.Y.M.D. Gunasekara, D.B.N. Pushpakumara, U.S. Weerathunga, N.K. Jayasekera, A.W. Kalupahana, R.S. Kalupahana, A. Silva-Fletcher, K.S.A. Kottawatta (2022). Extent of Antimicrobial Resistance (AMR) in an ecosystem with organized livestock farming in Sri Lanka. Conference – International Congress on Infectious Diseases by International Society for Infectious Diseases (ISID), Nov 17- 20, 2022, Kuala Lumpur, Malaysia.
  • B. M. Y. I. Basnayake, G. G. T. Nisansala, P. I. J. B. Wijewickrama, K. W. Y. M. D. Gunasekara, D. B. N. Pushpakumara, N.K. Jayasekera, A.W. Kalupahana, R.S. Kalupahana, A. Silva-fletcher, K.S.A. Kottawatta (2022). Prevalence and the Predominant Phenotypes of Multi Drug Resistant Escherichia coli in Livestock, Wild Animals and Associated Environment in Kosgama, Sri Lanka. Conference – Annual Scientific Sessions of Sri Lanka Veterinary Association.
  • B. M. Y. I. Basnayake, P. I. J. B.Wijewickrama, G.G.T. Nisansala, K.W. Y.M.D. Gunasekara, D.M.P.M. Dhanapala, D. B.N. Pushpakumara, A.W. Kalupahana, N.K. Jayasekera, R.S. Kalupahana, A. Silva-Fletcher, K.S.A. Kottawatta (2022). Prevalence of Multidrug Resistant Escherichia coli in an Ecosystem with Mixed Livestock and Wild Animals in Sri Lanka. Conference – Annual Scientific Sessions of Sri Lankan Society for Microbiology.
  • P.I.J.B. Wijewickrama, G.G.T. Nisansala, M.Y.I. Basnayake, K.W.M.Y.D. Gunasekara, N.K. Jayasekera, R.S. Kalupahana, A. Silva- fletcher,K.S.A. Kottawatta. (2022). Antimicrobial Resistance in Escherichia Coli isolated from Sequential Samples from a Small-Scale Broiler Farm in Sri Lanka: A Preliminary Study. 1st Academia Industry Convention 2022 of Faculty of Veterinary Medicine UPM & UMK, Malaysia.
  • B. M. Y. I. Basnayake, G.G.T. Nisansala, P.I.J.B. Wijewickrama, K.W.Y.M.D. Gunasekara, N.K. Jayasekera, A.W. Kalupahana, R.S. Kalupahana, A Silva-fletcher, K.S.A. Kottawatta (2022). Investigation of Antimicrobial Resistance in Escherichia coli Isolated from Soil and Water at Kosgama: Sri Lanka. Conference-The Second Rufford in country Conference, Bio Conservation Society, Sri Lanka.
  • K.W.M.Y.D. Gunasekara, G.G.T. Nisansala, P.I.J.B. Wijewickrama, B.M.Y.I. Basnayake, A. Silva Fletcher, R.S. Kalupahana, K.S.A. Kottawatta (2021). Antimicrobial resistance profiles and knowledge among the general public regarding antibiotics from a rural ecosystem in Sri Lanka; International Symposium of Sabaragamuwa University of Sri Lanka (ICSUSL) –2021; Oral presentation 1st – 3rd December 2021.
  • K.W.M.Y.D. Gunasekara, A. Silva-Fletcher, R.S. Kalupahana, K.S.A Kottawatta (2021). General public knowledge and perception about antimicrobials and antimicrobial resistance in a selected area in the Gampaha district; iPURSE 2021 at University of Peradeniya, Sri Lanka; Oral presentation November 11th and 12th, 2021.
  • B. M. Y. I. Basnayake, P.I.J.B. Wijewickrama, G.G.T. Nisansala, D.M.P.M. Dhanapala, D.B.N. Pushpakumara, N.K. Jayasekera, R.S. Kalupahana, A. Silva-Fletcher, K.S.A. Kottawatta (2021). Profiling of Antimicrobial Resistance in Escherichia coli Isolated from Livestock, Poultry, Wild Animals and an Aquaculture Farm in a Defined Area in Polgahawela Sri Lanka. Conference – Peradeniya University International Research Sessions (iPURSE).
  • D.M.P.M. Dhanapala, R.S. Kalupahana, A.W. Kalupahana, D.P.H.Wijesekara, K.S.A. Kottawatta, N.K. Jayasekera, A. Silva-Fletcher, S.S.S.DE S. Jagoda (2021). Antimicrobial Resistance of Aeromonas spp. Isolated from Freshwater Ornamental Fish Farming Environment in Sri Lanka. Peradeniya University International Research Sessions (iPURSE), 2021: p327.
  • Yasodhara Gunasekara, Thilini Nisansala, Isuru Wijewickrama, Yasodha Basnayake, Sanda Kottawatta, Ayona Silva-Fletcher, Ruwani Kalupahana (2021). Antimicrobial resistance profiles in Escherichia coli isolated from an urban ecosystem in Sri Lanka; One health approach; SLVA Annual Scientific Sessions 2021; Oral presentation 22nd – 23rd October 2021.
  • B. M. Y. I. Basnayake, G. G. T. Nisansala, P. I. J. B. Wijewickrama, U. S. Weerathunga, N. K. Jayasekera, A. W. Kalupahana, R. S. Kalupahana, A. Silva-Fletcher K. S. A. Kottawatta (2021). Investigation of Antimicrobial Resistance in Escherichia coli Isolated from Wild Animals at Hambegamuwa: Sri Lanka. Conference – Annual Scientific Sessions of Sri Lanka Veterinary Association.
  • M. L. W. P. De Silva, K.S.A. Kottawatta, R.S. Kalupahana, P.G.A. Pushpakumara C.B. Riley, K.A.N. Wijayawardhane (2021). Antimicrobial resistant pattern of Staphylococcus species isolated from canine pyoderma. 73rd Annual Convention of the Sri Lanka veterinary Association, 22 October 2021 (Oral Presentation).
  • D.M.P.M. Dhanapala, R.S. Kalupahana, A.W. Kalupahana, D.P.H.Wijesekara, K.S.A. Kottawatta, N.K. Jayasekera, A. Silva-Fletcher, S.S.S.DE S. Jagoda (2021). High Occurrence of Multi-drug Resistance among Gram-Negative Bacterial Pathogens in Freshwater Ornamental Fish.Proceedings of 73rd Annual Scientific Sessions of Sri Lanka Veterinary Association.
  • KWMYD Gunasekara, GGT Nisansala, PIJB Wijewickrama, BMYI Basnayake, A SilvaFletcher, RS Kalupahana and KSA. Kottawatta (2021). Patterns of antimicrobial resistance in Escherichia coli isolated from livestock and wild animals in an urban and a rural ecosystem; International health conference, University of Sri Jayewardenepura, Sri Lanka; poster presentation 15th October 2021.
  • M. L. W. P. De Silva, K. S. A. Kottawatta, C. Abeykoon, R.S. Kalupahana, P.G.A. Pushpakumara, C.B. Riley, K.A.N. Wijayawardhane (2020). Antimicrobial resistance among E. coli isolates from dogs presented with urinary tract infections to a veterinary teaching hospital. 72nd Annual Convention of the Sri Lanka veterinary Association, 3-5 July 2020 (Oral Presentation).
  • S.A.I.C. Subhasinghe, H.M.T.K. Karunarathne, S.P. Kodithuwakku, H.M.H. N. Bandara, R.S. Kalupahana, K.S.A. Kottawatta (2017). Antimicrobial resistance profiles of planktonic and biofilm associated Escherichia coli in poultry layer farms. Presented at 16th annual scientific sessions, World Poultry Association, 15th September 2017.
  • SUBHASINGHE I, BANDARA HMHN, KARUNARATHNA HMTK, KODITHUWAKKU SP, GALLAGE HC, KALUPAHANA RS, KOTTAWATTA KSA. (2025). Antimicrobial resistance patterns and biofilms resurgence ability of Escherichia coli associated with commercial layer chicken farms in Sri Lanka. Vet Microbiol. doi: 10.1016/j.vetmic.2025.110422. Epub 2025 Feb 5. PMID: 39923390.
  • DE SILVA, L. P., WIJAYAWARDHANE, N., KALUPAHANA, R. S., KOTTAWATTA, K. S. A., PUSHPAKUMARA, P. G. A., & RILEY, C. B. (2025). Antimicrobial Prescribing Practices Among Sri Lankan Veterinarians for Common Medical Conditions in Companion Animals. Animals, 15(1), 69.
  • DS THILAKARATHNE, BYI GAMAGE, KSA KOTTAWATTA, KGR ABAYAWANSHA, WSN GUNAWARDANA AND RS KALUPAHANA (2025). Decadal trends in antimicrobial susceptibility of Escherichia coli and Salmonella spp. in chicken from small-scale farm shops in Kandy district, Sri Lanka. J. Natn.Sci.Foundation Sri Lanka 2024 52 (4): 419 – 433. DOI:
  • T.M.T. CHATHUMINI, K.S.A. KOTTAWATTE, A.B.S. PABASARA, R.P.V.J. RAJAPAKSE, D.S. THILAKARATHNE AND T.S.R. FERNANDO (2025) Antimicrobial Resistant and Multi Drug Resistant Salmonella and Escherichia coli from Beef Production Chain and Associated Environments: A Study in Kandy District, Sri Lanka. Ceylon Journal of Science 54 (3) 2025: 799-809.
  • GUNAWARDANA, W., KALUPAHANA, R. S., KOTTAWATTA, S. A., GAMAGE, A., & MERAH, O. (2024). A Review of the Dissemination of Antibiotic Resistance through Wastewater Treatment Plants: Current Situation in Sri Lanka and Future Perspectives. Life, 4(9), 1065.
  • YASODHARA DEEPACHANDI GUNASEKARA, SANDA ARUNIKA KOTTAWATTA, THILINI NISANSALA, ISURU JAYAMINA BANDARA WIJEWICKRAMA, YASODHA I BASNAYAKE, AYONA SILVA‐FLETCHER, RUWANI SAGARIKA KALUPAHANA (2024). Antibiotic resistance through the lens of One Health: A study from an urban and a rural area in Sri Lanka. Zoonoses and Public Health, 71 (1) : 84 – 97.
  • BASNAYAKE,Y.I., WIJEWICKRAMA, I,B., NISANSALA, T., DHANAPALA, O., GUNASEKARA, Y.D., BAMUNUSINGHAGE, N.P.D., JAYASEKERA, N.K., KALUPAHANA, A.W., KALUPAHANA, R.S., SILVA-FLETCHER, A., KOTTAWATTA, S.A. (2023). Profiling of antimicrobial resistance (AMR) and multi drug resistance (MDR) of Escherichia coli isolates from livestock, wild animals and an ornamental fish farm in Polgahawela, Sri Lanka. Sri Lanka Veterinary Journal 70 (2): 9 – 21.
  • SUBHASINGHE, S. A. I. C., PABASARA, A. B. S., PATHIRAJA, P. M. H. M., KARUNARATHNA, H. M. T. K., KALUPAHANA, R. S., KOTTAWATTA, K. S. A. (2023). Glimpse into the biosecurity, antimicrobial usage, and antimicrobial resistance of fecal Escherichia coli associated with commercial chicken layer farms in a poultry dense area in Sri Lanka. Sri Lanka Veterinary Journal, 70 (1).
  • GUNASEKARA, YASODHARA DEEPACHANDI, TIERNEY KINNISON, SANDA ARUNIKA KOTTAWATTA, RUWANI SAGARIKA KALUPAHANA, AND AYONA SILVA-FLETCHER (2022). Exploring Barriers to One Health Antimicrobial Stewardship in Sri Lanka: A Qualitative Study among Healthcare Professionals. Antibiotics 11(7): 968.
  • GUNASEKERA YD, KINNISON T, KOTTAWATTA SA, SILVA-FLETCHER A, KALUPAHANA RS. (2022). Misconceptions of Antibiotics as a Potential Explanation for Their Misuse. A Survey of the General Public in a Rural and Urban Community in Sri Lanka. Journal - Antibiotics (Basel). 11(4):454.
  • BAMUNUSINGHAGE NPD, NEELAWALA RG, MAGEDARA HP, EKANAYAKA NW, KALUPAHANA RS, SILVA-FLETCHER A, KOTTAWATTA SA. (2022) Antimicrobial Resistance Patterns of Fecal Escherichia coli in Wildlife, Urban Wildlife, and Livestock in the Eastern Region of Sri Lanka, and Differences Between Carnivores, Omnivores, and Herbivores. Journal of Wildlife Diseases. 58(2):380-383.
  • DHANAPALA, P. M., KALUPAHANA, R. S., KALUPAHANA, A. W., WIJESEKERA, D. P. H., KOTTAWATTA, S. A., JAYASEKERA, N. K.,JAGODA, S. S. S. D. S. (2021). Characterization and Antimicrobial Resistance of Environmental and Clinical Aeromonas Species Isolated from Fresh Water Ornamental Fish and Associated Farming Environment in Sri Lanka. Microorganisms, 9(10).
  • FERNANDO SR, KOTTAWATTA KSA, JIANG L, CHEN X, CHENG KW, WONG BP, NG EH, YEUNG WS, LEE KF. (2021) Differential expression of protein disulfide isomerase (PDI) in regulating endometrial receptivity in humans. Reproductive Biology. 21(2).
  • WANG Z, KOTTAWATTA KSA, KODITHUWAKKU SP, FERNANDO TS, LEE YL, NG EHY, YEUNG WSB, LEE KF. (2021). The fungicide Mancozeb reduces spheroid attachment onto endometrial epithelial cells through downregulation of estrogen receptor β and integrin β3 in Ishikawa cells. Ecotoxicology and Environmental Safety. 208.:111606.
  • PUSHPAKUMARA, N., KOTTAWATTA, K., ABEYNAYAKE, P., & KALUPAHANA, R. (2019). Antimicrobial resistance patterns of faecal E. coli and Salmonella in wild animals in eastern wildlife region of Sri Lanka. Sri Lanka Veterinary Journal, 66, 21.
  • KALUPAHANA, R., MUGHINI-GRAS, L., KOTTAWATTA, S., SOMARATHNE, S., GAMAGE, C., & WAGENAAR, J. (2018). Weather correlates of Campylobacter prevalence in broilers at slaughter under tropical conditions in Sri Lanka. Epidemiology and Infection, 146(8), 972-979.
  • KOTTAWATTAGE S. A. KOTTAWATTA, MARCEL A. P. VAN BERGEN, PREENI ABEYNAYAKE, JAAP A. WAGENAAR, KEES T. VELDMAN AND RUWANI S. KALUPAHANA (2017). Campylobacter in Broiler Chicken and Broiler Meat in Sri Lanka: Influence of Semi-Automated vs. Wet Market Processing on Campylobacter Contamination of Broiler Neck Skin Samples. Foods, 6, 105.
  • KOTTAWATTA, K. S. A., SO, K. H., KODITHUWAKKU, S. P., NG, E. H., YEUNG, W. S. & LEE, K. F. (2015). MicroRNA-212 Regulates the Expression of Olfactomedin 1 and CTerminal Binding Protein 1 in Human Endometrial Epithelial Cells to Enhance Spheroid Attachment In Vitro. Biology of Reproduction, 93, 109. (Awarded the NRC President’s award for scientific publications – 2015). The figure generated based on the above paper (Kottawatta et al., 2015) was selected as the cover story for the November issue in the journal “Biology of Reproduction” (November issue - 2015).
  • SO, K. H., KODITHUWAKKU, S. P., KOTTAWATTA, K. S.A, LI, R. H., CHIU, P. C., CHEUNG, A. N., NG, E. H., YEUNG, W. S. & LEE, K. F. (2015b). Human chorionic gonadotropin stimulates spheroid attachment on fallopian tube epithelial cells through the mitogen-activated protein kinase pathway and down-regulation of olfactomedin-1. Fertility and Sterility, 104, 474-82. (Awarded the NRC President’s award for scientific publications – 2015).
  • CHEONG, A. W., PANG, R. T., LIU, W. M., KOTTAWATTA, K. S.A., LEE, K. F. & YEUNG, W. S. (2014). MicroRNA Let-7a and dicer are important in the activation and implantation of delayed implanting mouse embryos. Human Reproduction, 29, 750-62. (Awarded the NRC President’s award for scientific publications – 2014).
  • KALUPAHANA, R. S., KOTTAWATTA, K. S.A., KANANKEGE, K. S., VAN BERGEN, M. A., ABEYNAYAKE, P. & WAGENAAR, J. A. 2013. Colonization of Campylobacter spp. in broiler chickens and laying hens reared in tropical climates with low-biosecurity housing. Applied and Environmental Microbiology, 79, 393-5. (“NRC Merit Award for Scientific Publication -2013” was awarded for this publication)
  • GUNASEKARA, Y., KOTTAWATTA, S., NISANSALA, T., SILVA-FLETCHER, A., KALUPAHANA, R. (2023). Tackling Antimicrobial Resistance Needs One Health Approach. In, M. Vithanage and M. N.V. Prasad (Eds), One Health: Human, Animal, and Environment Triad (pp 309-320). John Wiley & Sons, Inc.