Michail Aggelos Valsamidis
PhD student
Mytilene, Lesvos, Greece
Education
November 2016- Now
PhD “Impact of the climate change on the virulence of fish pathogens and prevention of the diseases they cause”Department of Marine Sciences, University of the Aegean, Lesvos Island, Greece
December 2015
MSc Integrated Coastal Management Department of Marine Sciences, University of the Aegean, Lesvos Island, Greece
July 2014
BSc Marine Sciences Department of Marine Sciences, University of the Aegean, Lesvos Island, Greece
RESEARCH – WORKING EXPERIENCE
February 2026-March 2026
Researcher at Project“LactoVac”
Determination of infectious doses of strains of the species Lactococcus garviae andvaccination of fish with commercial vaccines against Lactococcus garviSae.
September 2025-November 2025
Researcher at Project“HIPRA's 4vac”
Evaluation of the protection of vaccinated sea bass with HIPRA's tetravalent vaccine,following experimental infection with Photobacteriumdamselae subsp. piscicida, Aeromonas veronii, and two different strains of Vibrio harveyi.
April 2025-July 2025
Researcher at Project“4vac”
Evaluation of the protection of vaccinated sea bass with an experimental tetravalentvaccine, following experimental infection with Photobacteriumdamselae subsp. piscicida, Aeromonas veronii, and two different strains of Vibrio harveyi.
February 2024-June2024
Researcher at Project“Vac6m”
Evaluation of vaccine protection against fish aeromonadosis following experimentalinfection with Aeromonas, 6 months post-vaccination.
March 2023- Now
Researcher at Project“ICHTHYAI”
Development of Research Activities of the Laboratory of Ichthyology, Aquaculture andFish Diseases.
January 2023 – Now
Researcher at Project“Feedactiv”
Development of functional fish feed based on bioactive compounds of marine and herbalorigins
September 2022 -June 2023
Researcher at Project“Kalloni Gulf”
Elaboration of a sanitary study of the Gulf of Kalloni, sampling and microbiologicalanalyses.
October 2021– May2023
Scholarship at Project“AGRICA II”
Network of Excellence in Agri-Food Research and Innovation of the Northern Aegean.
December 2020 –July 2023
Researcher at Project“TriVac”
Development of Trivalent Vaccines against Viral Necrosis, Photobacteriosis and Vibriosis.
December 2019 –March 2021
Researcher at Project“PCR development”
Development of a PCR microarray for the determination of gene changes associated withthe resistance of sea bass against viral neural necrosis by b-nodavirus, with potential forcommercial exploitation
October 2018 – June2020
Scholarship at Project“Human ResourcesDevelopment, Educationand Lifelong Learning ”
Impact of Climate Change on the Infectivity of Pathogenic Microorganisms and thePhysiology of Susceptible Aquatic Hosts.
June 2018 –December 2019
Researcher at Project“CMBR”
University of the Aegean - Upgrading and operation of research infrastructures withinthe framework of the CMBR Infrastructure.
Journal Publications
Bakopoulos, V., White, D., Valsamidis, M.A., Vasilaki F., 2016. Experimental infection ofOctopus vulgaris(Cuvier, 1797) with Photobacteriumdamsela subsp. piscicida. Immunohistochemical tracking of antigen and tissue responses. In press in the Journal of Invertebrate Pathology.
White, D., Valsamidis, M.A., Bakopoulos, V., 2022. In vitro hemocyte phagocytosis activation after experimental infection of common octopus, Octopus vulgaris(Cuvier, 1797) with Photobacterium damselae subsp. piscicida or Vibrio alginolyticus at different temperatures and infection routes, Journal of InvertebratePathology, Volume 191.
Valsamidis, M.A., White, D., Kokkoris G.D., Bakopoulos, V., 2022. Immune response of European sea bass (Dicentrarchus labrax L.) against combination ofantigens from three different pathogens, Veterinary Immunology and Immunopathology, Volume 256.
White, D., Valsamidis, M.A., Kokkoris G.D., Bakopoulos, V., 2023. The effect of temperature and challenge route on in vitro hemocyte phagocytosis activationafter experimental challenge of common octopus, Octopus vulgaris (Cuvier, 1797) with either Photobacterium damselae subsp. damselae or Vibrio anguillarumO1, Microbial Pathogenesis, Volume 174
Pappou, S., Valsamidis, M.A., Batjakas I.E., Bakopoulos V., 2023. Antibacterial activity of Ulva lactuca against important aquaculture bacterial strains. Bulletin ofthe University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Food Science and Technology.
Bakopoulos, V., Panagiotaki, A., Valsamidis, M.A., White, D.-M., Papaharisis, L., Dimitroglou, A., & Kakava, E., 2023. Correlations of betanodavirus load in thebrain of experimentally infected sea bass (Dicentrarchus labrax, L.) with varying levels of resistance to viral nervous necrosis. Mediterranean MarineScience, 24(3), 514–525.
Toubanaki, D.K., Efstathiou, A., Tzortzatos, O.P., Valsamidis, M. A., Papaharisis, L., Bakopoulos, V., Karagouni, E., 2023. Nervous Necrosis Virus Modulation ofEuropean Sea Bass (Dicentrarchus labrax, L.) Immune Genes and Transcriptome towards Establishment of Virus Carrier State. Int. J. Mol. Sci., 24, 16613.
Spinos, E., Katselis, G., Valsamidis, M. A., White, M. D., & Bakopoulos, V. 2024. Refining the Occurrence of Viral Encephalopathy and Retinopathy,Photobacteriosis, and Vibriosis in Connection with Seawater Physicochemical Parameters: A Five-Year Case Study. Mediterranean Marine Science, 25(1), 14–27.
Pappou S.,Bakopoulos V., Valsamidis M.A., Krokida M., White D.M., Batjakas J., 2024. Supplementation of a commercial diet of European sea bass by an algalethanolic extract of Ulva lactuca. Bulletin of University of Agricultural Sciences and Veterinary Medicine. Food Science and Technology
Pappou S., White D.M., Valsamidis M.A., Papadaki S., Vodnar D.C., Calinoiu L.F., Stergiopoulos C., Plamada D., Bakopoulos V., Batjakas I., 2025. In Vitro Effects ofSelected Plant Extracts and Essential Oils Against Bacterial Fish Pathogens and European Sea Bass (Dicentrarchus labrax L.) Leukocytes. SSRN.
White, D.-M.; Anastasiadou, E.; Valsamidis, M.-A.; Bakopoulos. 2025. V. Lysozyme Activity in the Hemolymph of Octopus vulgaris(Cuvier, 1797) FollowingChallenge with Gram-Negative Bacteria: Insights into Temperature-Driven Innate Immune Response. Fishes, 10, 428.
Conferences
White, D.M., Bountri, B., Famulari, S., Valsamidis, M.A., Bakopoulos, V., 2024. Common octopus challenge with Vibrio alginolyticus.Immunohistochemical tracking of antigen and tissue response. HydroMediT 2024, 5th International Congress on Applied Ichthyology,Oceanography & Aquatic Environment. Mytilene, Lesvos, Greece.
White, D.M., Valsamidis, M.A., Kokkoris, G., Bakopoulos, V., 2021. The effect of temperature and infection route on in vitro hemocyte phagocytosis activationafter experimental infection of common octopus, Octopus vulgaris (Cuvier, 1797) with either Photobacterium damselaesubsp. damselaeor VibrioanguillarumO1. “HydroMediT” 4th International Congresses on Applied Ichthyology, Oceanography and Aquatic Enviroment. Mytilene, Lesvos, Greece.
White, D.M., Valsamidis, M.A., Bakopoulos, V., 2021. Hemolymph activities after experimental infection of common octopus, Octopus vulgaris (Cuvier, 1797)with Photobacterium damselaesubsp. piscicida. “HydroMediT” 4th International Congresses on Applied Ichthyology, Oceanography and Aquatic Enviroment.Mytilene, Lesvos, Greece.
Bakopoulos, V., Valsamidis, M.A., White, D.M., Papaharisis, L., Toubanaki, D.K., Karagouni, E., 2021. Humoral immune response of sea bass (Dicentrarchus labrax)with natural resistance to the RGNNV genotype of b-Nodavirus. “HydroMediT” 4th International Congresses on Applied Ichthyology, Oceanography and AquaticEnviroment. Mytilene, Lesvos, Greece.
Bakopoulos, V., Valsamidis, M.A., White, D.M., Kokkoris, G.D., 2021. Specific immune response of sea bass (Dicentrarchus labrax) immunized with variousantigens of Photobacterium damselaesubsp. piscicida, Vibrio anguillarumO1 and b-Nodavirus. “HydroMediT” 4th International Congresses on AppliedIchthyology, Oceanography and Aquatic Enviroment. Mytilene, Lesvos, Greece.
Toubanaki, D.K., Tzortzatos, O.P., Efstathiou, A., Palaiologos, A., Valsamidis, M.A., White, D.M., Papaharisis, L., Bakopoulos, V., Karagouni, E., 2021. Nervousnecrosis virus persistent infection of sea bass (Dicentrarchus labrax) affects interferon pathway-related gene transcription. “HydroMediT” 4th InternationalCongresses on Applied.
White, D.M., Valsamidis, M.A., Bakopoulos, V., 2020. Hemocyte phagocytosis binding intensity of experimentally infected Octopus vulgaris (Cuvier, 1797) withPhotobacterium damselaesubsp. piscicida. Webinar on Aquaculture and Fisheries.
Bakopoulos, V., Valsamidis, Μ.Α., Palaiologos, Α., White, D.Μ., Andreadis, O., Dimitroglou, Α., Papanna, Κ., Kottaras, Ε., Kakava, Ε., Papaharisis, L., 2019. Geneticimprovement and resistance of sea bass, Dicentrarchus labrax, against Photobacteriosis. 17th Panhellenic Congress of Ichthyologists, "Management of aquaticecosystems: New challenges and perspectives", Heraklion, Crete.