Acute aerocistitis induced by thioglycolate, lipopolysaccharide and inactivated Aeromonas hydrophila in Piaractus mesopotamicus: hematological effects

  • Julieta Rodini Engrácia de Moraes Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Patologia Veterinária, Jaboticabal, SP
  • Fabiana Rizzi Bozzo Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Patologia Veterinária, Jaboticabal, SP
  • Rodrigo O. A. Ozorio Universidade do Porto, Centro Interdisciplinar de Investigação Marinha e Ambiental, Porto, Portugal
  • Jair Rodin Engrácia Filho Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Patologia Veterinária, Jaboticabal, SP
  • Flávio Ruas de Moraes Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Patologia Veterinária, Jaboticabal, SP
Keywords: Inflammation, Blood. Erythrocytes, Leucocytes, Thrombocytes

Abstract

The effects of swim bladder injection with thioglycolate, Escherichia coli lipopolysaccharide (LPS) and heat-inactivated Aeromonas hydrophila were assessed on hematological responses in pacu, Piaractus mesopotamicus (Characidae). A quantitative assessment was done on erythrocytes, thrombocytes e leucocytes at 6, 24, and 48 h pos-injection of the inflammatory agents and compared with fish injected with saline solution (control). Fish injected with inactivated A.hydrophila showed a reduction of erythrocytes and hemoglobin, whereas the hematocrit increased 6 h pos-injection.The results show that thioglycolate and LPS also induced a reduction on hemoglobin and an increase on the hematocrit. The thrombocytes count decreased 6 h post A. hydrophila injection, whereas increased 48 hours post LPS injection. The leukocytes count increased after 6 h post A. hydrophila injection, while the lymphocytes and PAS-positive granularleukocytes (PAS-LG) count decreased after 24 h post injection. In fish injected with thioglycolate or with LPS showed an increase in the LG-PAS counts when compared to A. hydrophila or control groups. The monocytes count was not affected by the different inflammatory agents.

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Published
2012-10-26
How to Cite
Moraes, J., Bozzo, F., Ozorio, R., Engrácia Filho, J., & Moraes, F. (2012). Acute aerocistitis induced by thioglycolate, lipopolysaccharide and inactivated Aeromonas hydrophila in Piaractus mesopotamicus: hematological effects. Brazilian Journal of Veterinary Research and Animal Science, 49(5), 345-353. https://doi.org/10.11606/issn.2318-3659.v49i5p345-353
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