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Título

Water temperature, time of exposure and population density are key parameters in Enteromyxum leei fish‐to‐fish experimental transmission

AutorPicard-Sánchez, Amparo CSIC; Estensoro, Itziar CSIC ORCID; Pozo, R. del CSIC; Palenzuela, Oswaldo CSIC ORCID ; Piazzon de Haro, María Carla CSIC ORCID ; Sitjà-Bobadilla, Ariadna CSIC ORCID
Palabras claveHost-parasite interaction
Growth delay
Time of exposure
Temperatures
Antibodies
Fecha de publicaciónabr-2020
EditorJohn Wiley & Sons
CitaciónJournal of Fish Diseases 43(4): 491-502 (2020)
ResumenEnteromyxum leei is a myxozoan histozoic parasite that infects the intestine of several teleost fish species. In gilthead sea bream (Sparus aurata), it provokes a chronic disease, entailing anorexia, delayed growth, reduced marketability and mortality. Direct fish‐to‐fish transmission, relevant in aquaculture conditions, has been demonstrated for E. leei via effluent, cohabitation, and oral and anal routes. However, the minimum time of exposure for infection has not been established, nor the possible effect on the fish immune response. Two effluent trials were performed at different temperatures (high: average of 25.6°C; and low: constant at 18°C), different times of exposure to the effluent (1, 3, 5 and 7 weeks) and different population densities. The results showed that 1 week was enough to infect 100% of fish at high temperature and 58.3% at low temperature. High temperature not only increased the prevalence of infection in posterior intestine, but also induced a higher production of specific antibodies, limiting the progression of the infection along the intestine. Longer time of exposure to the parasite and higher fish densities facilitated E. leei infection. These results show that effective diagnosis, lowering animal density and removal of infected fish are key aspects to manage this disease in aquaculture facilities.
Versión del editorhttps://doi.org/10.1111/jfd.13147
URIhttp://hdl.handle.net/10261/206145
DOI10.1111/jfd.13147
ISSN0140-7775
E-ISSN1365-2761
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