Hematological and immune changes in Piaractus mesopotamicus in the sepsis induced by Aeromonas hydrophila

Author(s)

Claudiano, Gustavo S. ^{[1, 2]} ; Yunis-Aguinaga, Jefferson ^[3] ; Marinho-Neto, Fausto A. ^[1] ; Miranda, Renata L. ^[4] ; Martins, Isabela M. ^[1] ; Otani, Fabrizia S. ^[2] ; Mundim, V, Antonio ; Marzocchi-Machado, Cleni M. ^[5] ; Moraes, Julieta R. E. ^{[1, 3]} ; de Moraes, Flavio Ruas ^[1]

Affiliation

^[1] Sao Paulo State Univ, Fac Agrarian & Vet Sci, Dept Vet Pathol, Unesp, Sao Paulo - Brazil

^[2] Fed Univ Western Para, Inst Biodivers & Forests, UFOPA, Santarem, Para - Brazil

^[3] UNESP, Aquaculture Ctr, Jaboticabal, SP - Brazil

^[4] V, Fed Univ Uberlandia UFU, Vet Hosp, Clin Anal Lab, Uberlandia, MG - Brazil

^[5] Univ Sao Paulo, Ribeirao Preto Sch Pharmaceut Sci, Dept Clin Toxicol & Bromatol Anal, Sao Paulo - Brazil

• Document type: Journal article
• Source: FISH & SHELLFISH IMMUNOLOGY; v. 88, p. 259-265, MAY 2019.
• Web of Science Citations: 3

Abstract

The pathogenesis of sepsis involves complex systems and multiple interrelationships between the host and pathogen producing high mortality rates in various animal species. In this study, hematological disturbances, innate immunity and survival during the septic process in Piaractus mesopotamicus inoculated with Aeromonas hydrophila were studied. For this aim, fish blood samples were taken from control and infected groups 1, 3, 6, and 9 h post-inoculation (HPI). Leukogram showed reduction in the number of leukocytes and thrombocytes, followed by cessation of leukocyte chemotaxis 6 HPI and severe morphological changes in leukocytes and erythrocytes. At 3 HPI production of reactive oxygen species increased and at 6 HPI decreased. There was no change in serum lysozyme concentration and lytic activity of the complement system, despite the progressive increase in serum lytic activity and bacterial agglutination. Finally, the changes in clinical signs due to aeromonosis and increasing septicemia resulted in a reduction in survival to 57.14% after 36 HPI. It was possible concluded that these hematological and immune are crucial event in the worsening of sepsis in P. mesopotamicus, and these findings are utility for diagnosing and understanding the pathophysiology sepsis in pacu induced by A. hydrophila. (AU)

• FAPESP's process: 11/20280-2 - Pathophysiologic aspects of sepsis in Piaractus mesopotamicus INDUCED Aeromonas hydrophila
• Grantee: Gustavo da Silva Claudiano
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 14/10231-2 - Septic response induced in Aeromonas hydrophila Piaractus mesopotamicus: pro-inflammatory and physiological morphological changes
• Grantee: Flávio Ruas de Moraes
• Support Opportunities: Regular Research Grants