Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae
Environmental changes affect fish homeostasis, turning them more susceptible to diseases. In Brazil, outbreaks of Streptococcus agalactiae infection have been reported in Nile tilapia when they are outside of their thermal comfort zone. This investigation evaluated mortality rate and which were the...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.unesp.br:11449/227964 |
| Acceso en línea: | http://dx.doi.org/10.11606/issn.1678-4456.v52i1p57-62 http://hdl.handle.net/11449/227964 |
| Access Level: | acceso abierto |
| Palabra clave: | Homeostasis Oreochromis niloticus Teleost Thermal stress |
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Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiaeInfluence of temperature on streptococcus agalactiae infection in nile tilapiaHomeostasisOreochromis niloticusTeleostThermal stressEnvironmental changes affect fish homeostasis, turning them more susceptible to diseases. In Brazil, outbreaks of Streptococcus agalactiae infection have been reported in Nile tilapia when they are outside of their thermal comfort zone. This investigation evaluated mortality rate and which were the most infected organs at temperatures that naturally occurred in southern of Brazil. Forty Nile tilapia (Oreochromis niloticus) were infected with S. agalactiae and distributed in four groups (n=10) and each group was exposed to a different temperature: G1: 24°C, G2: 26°C, G3: 28°C, and G4: 32°C. Fish were monitored for 10 days. In this period, fish that presented irreversible clinical signs were sacrificed and samples of brain, liver, and kidney were collected for bacteriological and molecular analysis. Signs compatible with a streptococcal infection were observed in all groups. Highest mortality rates occurred at 24°C and 32°C. The brain was the most affected organ with the highest percentage of isolation of S. agalactiae by both methods of diagnosis. The results suggest that, as in mammals, temperatures that are further away from the comfort zone influence fish homeostasis, increasing susceptibility to bacterial infections.Universidade Estadual Paulista “Júlio de Mesquita Filho”, Departamento de Patologia AnimalUniversidade Estadual Paulista “Júlio de Mesquita Filho”, Centro de AquiculturaUniversidade do Norte do Paraná, Campus Luiz MeneghelUniversidade Estadual Paulista “Júlio de Mesquita Filho”, Departamento de Patologia AnimalUniversidade Estadual Paulista “Júlio de Mesquita Filho”, Centro de AquiculturaUniversidade Estadual Paulista (UNESP)Universidade do Norte do Paraná, Campus Luiz Meneghel2022-04-29T07:25:59Z2022-04-29T07:25:59Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article57-62http://dx.doi.org/10.11606/issn.1678-4456.v52i1p57-62Brazilian Journal of Veterinary Research and Animal Science, v. 52, n. 1, p. 57-62, 2015.1678-44561413-9596http://hdl.handle.net/11449/22796410.11606/issn.1678-4456.v52i1p57-622-s2.0-84927777236Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporBrazilian Journal of Veterinary Research and Animal Scienceinfo:eu-repo/semantics/openAccessMarcusso, Paulo Fernandes [UNESP]Aguinaga, Jefferson Yunis [UNESP]Da Silva Claudiano, Gustavo [UNESP]Eto, Silas Fernandes [UNESP]Fernandes, Dayanne Carla [UNESP]Mello, Hurzana [UNESP]De Almeida Marinho Neto, FaustoSalvador, RogérioDe Engrácia Moraes, Julieta Rodini [UNESP]De Moraes, Flávio Ruas [UNESP]2024-04-09T15:29:36Zoai:repositorio.unesp.br:11449/227964Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462024-04-09T15:29:36Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
| dc.title.none.fl_str_mv |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae Influence of temperature on streptococcus agalactiae infection in nile tilapia |
| title |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| spellingShingle |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae Marcusso, Paulo Fernandes [UNESP] Homeostasis Oreochromis niloticus Teleost Thermal stress |
| title_short |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| title_full |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| title_fullStr |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| title_full_unstemmed |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| title_sort |
Influência da temperatura na infecção de tilápias do nilo por streptococcus agalactiae |
| dc.creator.none.fl_str_mv |
Marcusso, Paulo Fernandes [UNESP] Aguinaga, Jefferson Yunis [UNESP] Da Silva Claudiano, Gustavo [UNESP] Eto, Silas Fernandes [UNESP] Fernandes, Dayanne Carla [UNESP] Mello, Hurzana [UNESP] De Almeida Marinho Neto, Fausto Salvador, Rogério De Engrácia Moraes, Julieta Rodini [UNESP] De Moraes, Flávio Ruas [UNESP] |
| author |
Marcusso, Paulo Fernandes [UNESP] |
| author_facet |
Marcusso, Paulo Fernandes [UNESP] Aguinaga, Jefferson Yunis [UNESP] Da Silva Claudiano, Gustavo [UNESP] Eto, Silas Fernandes [UNESP] Fernandes, Dayanne Carla [UNESP] Mello, Hurzana [UNESP] De Almeida Marinho Neto, Fausto Salvador, Rogério De Engrácia Moraes, Julieta Rodini [UNESP] De Moraes, Flávio Ruas [UNESP] |
| author_role |
author |
| author2 |
Aguinaga, Jefferson Yunis [UNESP] Da Silva Claudiano, Gustavo [UNESP] Eto, Silas Fernandes [UNESP] Fernandes, Dayanne Carla [UNESP] Mello, Hurzana [UNESP] De Almeida Marinho Neto, Fausto Salvador, Rogério De Engrácia Moraes, Julieta Rodini [UNESP] De Moraes, Flávio Ruas [UNESP] |
| author2_role |
author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade do Norte do Paraná, Campus Luiz Meneghel |
| dc.subject.por.fl_str_mv |
Homeostasis Oreochromis niloticus Teleost Thermal stress |
| topic |
Homeostasis Oreochromis niloticus Teleost Thermal stress |
| description |
Environmental changes affect fish homeostasis, turning them more susceptible to diseases. In Brazil, outbreaks of Streptococcus agalactiae infection have been reported in Nile tilapia when they are outside of their thermal comfort zone. This investigation evaluated mortality rate and which were the most infected organs at temperatures that naturally occurred in southern of Brazil. Forty Nile tilapia (Oreochromis niloticus) were infected with S. agalactiae and distributed in four groups (n=10) and each group was exposed to a different temperature: G1: 24°C, G2: 26°C, G3: 28°C, and G4: 32°C. Fish were monitored for 10 days. In this period, fish that presented irreversible clinical signs were sacrificed and samples of brain, liver, and kidney were collected for bacteriological and molecular analysis. Signs compatible with a streptococcal infection were observed in all groups. Highest mortality rates occurred at 24°C and 32°C. The brain was the most affected organ with the highest percentage of isolation of S. agalactiae by both methods of diagnosis. The results suggest that, as in mammals, temperatures that are further away from the comfort zone influence fish homeostasis, increasing susceptibility to bacterial infections. |
| publishDate |
2015 |
| dc.date.none.fl_str_mv |
2015-01-01 2022-04-29T07:25:59Z 2022-04-29T07:25:59Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.11606/issn.1678-4456.v52i1p57-62 Brazilian Journal of Veterinary Research and Animal Science, v. 52, n. 1, p. 57-62, 2015. 1678-4456 1413-9596 http://hdl.handle.net/11449/227964 10.11606/issn.1678-4456.v52i1p57-62 2-s2.0-84927777236 |
| url |
http://dx.doi.org/10.11606/issn.1678-4456.v52i1p57-62 http://hdl.handle.net/11449/227964 |
| identifier_str_mv |
Brazilian Journal of Veterinary Research and Animal Science, v. 52, n. 1, p. 57-62, 2015. 1678-4456 1413-9596 10.11606/issn.1678-4456.v52i1p57-62 2-s2.0-84927777236 |
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por |
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por |
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Brazilian Journal of Veterinary Research and Animal Science |
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info:eu-repo/semantics/openAccess |
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openAccess |
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57-62 |
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Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
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Universidade Estadual Paulista (UNESP) |
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UNESP |
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UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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