TY - JOUR T1 - Fish Immunity Against Nervous Necrosis Virus (NNV) Infection: A Review TT - Fish Immunity Against Nervous Necrosis Virus (NNV) Infection: A Review AU - Mansor, Nur Nazifah AU - Roslan, Irfan Hakimi AU - Abdullah, Azila AU - Nawi, Mohd Firdaus AU - Abdul Rahim, Nur Amalin Sofea AU - Mohd Khalid, Hazreen Nita PY - 2025 DA - April Y2 - 2024 DO - 10.38001/ijlsb.1542126 JF - International Journal of Life Sciences and Biotechnology JO - Int J. Life Sci. Biotechnol. PB - International Society of Academicians WT - DergiPark SN - 2651-4621 SP - 74 EP - 84 VL - 8 IS - 1 LA - en AB - Fish are unique organisms fitted with a certain degree of immune system that are similarly to mammals, made up of innate and adaptive immunity. Both innate and adaptive immunity mechanisms in fish are crucial as the first line of defense as well as secreting antibodies and memory cells following an infection. Innate immunity comprised of non-specific cellular and the nonspecific humoral components while adaptive immunity consists of specialized systemic cells and mechanisms that are categorized into two main groups: the humoral and cellular components. Prior to Nervous Necrosis Virus (NNV) infection caused by small (25-30 nm), non-enveloped and icosahedral shaped virus belongs to genus Betanodavirus, both innate and adaptive immunity mechanisms have their own parts to play. As Nervous NecrosisVirus (NNV) invades fish body, pathogen will be break down through phagocytosis followed by presentation of small protein fragments on MHC class II molecules. This will eventually activate adaptive immunity pathway to stimulates the proliferation and maturation of the B cells. As B cells matured, antibodies will be produced to suppress the pathogen through series of process known as opsonization and neutralization before phagocytosis takes place. Following secondary exposure with the same antigen, B cells will rapidly proliferate, releasing significant number of antibodies to clear the antigen. KW - Immunity KW - Viral Nervous Necrosis (VNN) KW - Nervous Necrosis Virus (NNV) KW - Betanodavirus KW - Antibody KW - Antigen N2 - Fish are unique organisms fitted with a certain degree of immune system that are similarly to mammals, made up of innate and adaptive immunity. Both innate and adaptive immunity mechanisms in fish are crucial as the first line of defense as well as secreting antibodies and memory cells following an infection. Innate immunity comprised of non-specific cellular and the nonspecific humoral components while adaptive immunity consists of specialized systemic cells and mechanisms that are categorized into two main groups: the humoral and cellular components. Prior to Nervous Necrosis Virus (NNV) infection caused by small (25-30 nm), non-enveloped and icosahedral shaped virus belongs to genus Betanodavirus, both innate and adaptive immunity mechanisms have their own parts to play. As Nervous Necrosis Virus (NNV) invades fish body, pathogen will be break down through phagocytosis followed by presentation of small protein fragments on MHC class II molecules. This will eventually activate adaptive immunity pathway to stimulates the proliferation and maturation of the B cells. As B cells matured, antibodies will be produced to suppress the pathogen through series of process known as opsonization and neutralization before phagocytosis takes place. Following secondary exposure with the same antigen, B cells will rapidly proliferate, releasing significant number of antibodies to clear the antigen. CR - AFS., Annual Fisheries Statistic. Department of Fisheries, Ministry of Agriculture & Agro-Based Industry, Malaysia. 2021 CR - Ransangan, J., et al., Betanodavirus infection in marine fish aquaculture in Malaysia. Res. J. Anim. Vet. Fish. Sci, 2013. 1(7), 10-15. CR - Hazreen-Nita, M., et al., A review of betanodavirus vaccination as preventive strategy to viral nervous necrosis (VNN) disease in grouper. Aquaculture International, 2019. 27(5), 1565-1577. CR - Håstein, T., Principles of prevention and control of aquatic animal diseases. Comprehensive reports on technical items presented to the International Committee or to Regional Commissions, 2000, 1-27. CR - Rodgers, C. J., C. V. Mohan and E. J. Peeler, The spread of pathogens through trade in aquatic animals and their products. Rev sci tech Off int Epiz, 2011. 30(1), 241-256. CR - Haenen, O. L. M., et al., The emergence of koi herpesvirus and its significance to European aquaculture. Bulletin of the European Association of Fish Pathologists, 2004. 24(6), 293-307. CR - Juniarsih A, Mahasri G and Kismiyati K, 2017 J. Aquac. Fish Heal. 6 74–80 CR - Mugimba, K. K., et al., Challenges and solutions to viral diseases of finfish in marine aquaculture. Pathogens, 2021. 10(6), 673 CR - Rodger, H. D., Fish disease causing economic impact in global aquaculture. In Fish vaccines (pp. 1-34). Springer, Basel. 2016. CR - Biller-Takahashi, J. D., and E. C. Urbinati, Fish Immunology. The modification and manipulation of the innate immune system: Brazilian studies. Anais da Academia Brasileira de Ciências, 2014. 86, 1484-1506. UR - https://doi.org/10.38001/ijlsb.1542126 L1 - https://dergipark.org.tr/tr/download/article-file/4184433 ER -