Mortality of tambacus (Colossoma macropomum x Piaractus mesopotamicus) infected by Edwardsiella tarda

Authors

  • Leonardo Zamae Winckler Universidade Católica Dom Bosco
  • Ricardo Martins Santos Universidade Católica Dom Bosco
  • Milena Wolff Ferreira Universidade Católica Dom Bosco
  • Filipe Martins Santos Universidade Católica Dom Bosco
  • Tereza Cristina Leite Universidade Católica Dom Bosco
  • Gisele Braziliano de Andrade Universidade Católica Dom Bosco

DOI:

https://doi.org/10.11606/issn.1678-4456.v52i1p63-67

Keywords:

Eutrophication, Fish infection, Septicemia, Edwardsiella tarda

Abstract

An outbreak of mortality of tambacus (Colossoma macropomum x Piaractus mesopotamicus) cultivated in dug tanks at UCDB was reported. Animals had clinical surface symptoms of lethargy, anorexia, increased mucus production, cluttering and swimming toward the water. Macroscopic examination of three fishes showed hemorrhages of the fins and skin, corneal opacity, hemoperitoneum, gallbladder distension and repletion, congestion and hemorrhages of the digestive tract. Water quality analysis indicated large amounts of phytoplankton that proliferated as a result of the excessive organic matter causing eutrophication of the water. The microbiological examination of tambacus lesions revealed the presence of the bacterium Edwardsiella tarda. The cause of the tambacus death was attributed to opportunistic infection by E. tarda, favored by the imbalance due to the intense organic matter in suspended in the water. Deaths stopped after the correction of the water quality parameters.

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Author Biographies

Leonardo Zamae Winckler, Universidade Católica Dom Bosco

Centro de Ciêncais Agrárias

Ricardo Martins Santos, Universidade Católica Dom Bosco

Laboratório de Microbiologia da Universidade Católica Dom Bosco

Milena Wolff Ferreira, Universidade Católica Dom Bosco

Centro de Ciêncais Agrárias

Curso de Zootecnia

Filipe Martins Santos, Universidade Católica Dom Bosco

Mestrado e Doutorado em Ciências Ambientais e Sustentabilidade Agropecuária

 

Tereza Cristina Leite, Universidade Católica Dom Bosco

Centro de Ciêncais Agrárias

Gisele Braziliano de Andrade, Universidade Católica Dom Bosco

Mestrado e Doutorado em Ciências Ambientais e Sustentabilidade Agropecuária

 

Published

2015-04-13

How to Cite

Winckler, L. Z., Santos, R. M., Ferreira, M. W., Santos, F. M., Leite, T. C., & Andrade, G. B. de. (2015). Mortality of tambacus (Colossoma macropomum x Piaractus mesopotamicus) infected by Edwardsiella tarda. Brazilian Journal of Veterinary Research and Animal Science, 52(1), 63-67. https://doi.org/10.11606/issn.1678-4456.v52i1p63-67

Issue

Section

ARTICLES