Influence of water temperature and fish age on mortality in brook trout (Salvelinus fontinalis) infected with infectious pancreatic necrosis virus (IPNV) |
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| Affiliation: | 1. Laboratorio de Parasitología General y Especializada, Facultad de Ciencias Naturales y Matemática, Universidad Nacional Federico Villarreal (UNFV), Código postal 15007, El Agustino, Lima, Peru;2. Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil, 4365, RJ CEP 21040-360, Brazil;3. Programa de Pós-Graduação em Ciências Veterinárias, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ CEP 23890-000, Brazil;4. Programa de Pós-Graduação em Biologia Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ CEP 23890-000, Brazil;5. Departamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro, Caixa Postal 74.540, Seropédica, RJ, Brazil, CEP 23851-970.;1. Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston 7250, Tasmania, Australia;2. Centre for Environmental Sustainability and Remediation, School of Science, RMIT University, PO Box 71, Bundoora, 3083, Victoria, Australia;1. Department of Aquatic Animal Medicine, College of Fisheries, Huazhong Agricultural University, Wuhan, People''s Republic of China, 430070;2. Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Wuhan, People''s Republic of China, 430070;3. Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, People''s Republic of China, 430070;1. School of Biological Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia;2. School of Veterinary Science, The University of Queensland, Gatton, Queensland 4343, Australia |
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| Abstract: | Brook trout, Salvelinus fontinalis, from hatching up to 31 weeks of age, were tested for susceptibility to IPNV at experimental temperatures of 5, 10 and 15°C. There were two different intervals of physiological age demonstrating specific characteristics of sensitivity to IPN viral infection in these fish. From 6 to 12 weeks of age, the peak mortality manifested itself around 21 days postinfection. In fish 15–21 weeks of age, mortality peaked as early as 10 days post-infection. Before or after these age intervals the fish did not appear to be sensitive to the virus. Moreover, the disease was produced at 10 and 15°C but fingerlings appeared resistant at 5°C. |
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