Effects of azithromycin on tilapia (Oreochromis niloticus): health status evaluation using biochemical, physiological and morphological biomarkers

dc.contributor.authorShiogiri, Natalia Sayuri
dc.contributor.authorIkefuti, Cynthia Venancio [UNESP]
dc.contributor.authorCarraschi, Silvia Patricia [UNESP]
dc.contributor.authorCruz, Claudinei da [UNESP]
dc.contributor.authorFernandes, Marisa Narciso
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:34:48Z
dc.date.available2018-11-26T17:34:48Z
dc.date.issued2017-07-01
dc.description.abstractBacterial diseases cause tilapia's high-mortality outbreak. This study investigated the toxicity of azithromycin (AZT), a macrolide antibiotic that has been considered a possible therapeutic drug for tilapia aquacultural use. The 48-h acute toxicity (50% lethal concentration, LC50; 48h) of AZT was determined for Oreochromis niloticus. Thereafter, fish were exposed to 0, 1, 50 and 100mgL(-1) AZT during 14days (chronic exposure) and measured the haematological variables, the activity of superoxide dismutase, catalase, glutathione peroxidase, glutathione-S-transferase (GST) and the concentration of glutathione (GSH), protein carbonyl and lipid peroxidation in the liver; histopathology was analysed the liver, gills and kidneys. The LC50; 48h was >100mgL(-1). No fish died during chronic exposure. Haematocrit and haemoglobin concentration increased in fish exposed to 50 and 100mgL(-1), and the total number of leucocyte and thrombocyte increased after exposure to 100mgL(-1) AZT, suggesting a stimulation of defence cell production. In the liver, the antioxidant enzyme activities did not change, but GST activity and the GSH level increased in fish exposed to 100mgL(-1) AZT. Oxidative stress did not occur. Histopathological index (HIL) indicates moderate liver damage; minor histological changes in the gill and no change in the kidneys. AZT was considered non-toxic for O. niloticus after acute exposure and, although it causes moderated histopathology in the liver after chronic exposure, this antibiotic may be an alternative against bacterial infections, depending on its efficacy to control bacterial disease in fish.en
dc.description.affiliationUniv Fed Sao Carlos, Ctr Ciencias Biol & Saude, Dept Ciencias Fisiol, Sao Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Ctr Aquicultura Univ Estadual Paulista CAUNESP, Dept Fitossanidade, Sao Paulo, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Ctr Aquicultura Univ Estadual Paulista CAUNESP, Dept Fitossanidade, Sao Paulo, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2011/21552-6
dc.description.sponsorshipIdCNPq: 573949/2008-5
dc.format.extent3669-3683
dc.identifierhttp://dx.doi.org/10.1111/are.13191
dc.identifier.citationAquaculture Research. Hoboken: Wiley, v. 48, n. 7, p. 3669-3683, 2017.
dc.identifier.doi10.1111/are.13191
dc.identifier.issn1355-557X
dc.identifier.urihttp://hdl.handle.net/11449/162880
dc.identifier.wosWOS:000403357900032
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofAquaculture Research
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectgills
dc.subjecthaematology
dc.subjecthistopathology
dc.subjectkidney
dc.subjectliver
dc.subjectoxidative stress
dc.titleEffects of azithromycin on tilapia (Oreochromis niloticus): health status evaluation using biochemical, physiological and morphological biomarkersen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell

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