Pathophysiologic aspects of sepsis in Piaractus mesopotamicus INDUCED Aeromonas hydrophila

• Grant number: 11/20280-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date until: January 01, 2012
• End date until: June 30, 2015
• Field of knowledge: Agronomical Sciences - Veterinary Medicine - Animal Pathology
• Principal Investigator: Flávio Ruas de Moraes
• Grantee: Gustavo da Silva Claudiano
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Sepsis is defined as systemic inflammatory response syndrome that occurs during infection. Although it is a major cause of mortality in fish, no shortage of literature on the pathophysiology of sepsis in teleosts. Thus, this study aims to assess and characterize the pathophysiological and histological changes of sepsis, identifying and quantifying gene expression of tumor necrosis factor ± and interleukin 1 in sepsis induced by Aeromonas hydrophila in pacu, and acute inflammation in the bladder under the influence of sepsis. For this, 260 will be used pacu, Piaractus mesopotamicus, with average weight of 150.71 ± 26.73 g and mean total length of 15.27 ± 1.60 cm. Initially it will be done to standardize the inoculum by determination of bacterial concentration lethal to 50.0% of the fish (LC50). Sepsis is induced by administration of the inoculum intracelomática corresponding to LC50 of A. hydrophila. The animals will be divided into two groups, one will receive 0.5 ml of NaCl solution (control group) and another group received the same volume containing the inoculum (challenge group) in a completely randomized design. Previously, half, one and two hours after inoculation the blood profile will be characterized, biochemical and coagulation of the host. For the characterization of histopathological changes, fragments of liver, spleen, kidney, heart and gills will be collected at the end of the age six, 12, 24 and 48 hours after induction of sepsis. The determination of gene expression of tumor necrosis factor (TNF-±) and interleukin 1 (IL-1) will occur 24 hours after induction of sepsis, the method reverse transcription-polymerase chain reaction (PCR) in real time. Immediately after induction of sepsis will be injected into the bladder with the inflammatory stimulus thioglycolate to 6% in saline 0.65% and after six, 12, 24 and 48 hours after stimulation, the exudate will be collected for the total count and differential cells accumulated in the bladder. Bacteria will be quantified in the blood in the exudate. Throughout the experiment the animals will be evaluated for clinical changes and the mortality rate will be assessed during the infection period for a maximum period of 10 days of observation. The results will be compared using analysis of variance (ANOVA) at 5% probability and the difference between the averages will be compared by Tukey test.

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ENGRACIA FILHO, J. R.; SHIMADA, M. T.; YUNIS-AGUINAGA, J.; RAMOS-ESPINOZA, F. C.; MORAES, F. R.; MORAES, J. R. E.. Deformities in reared cobia, Rachycentron canadum L. and grouper, Epinephelus marginatus, in Sao Paulo state coast, Brazil: case report. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 70, n. 5, p. 1565-1568, SEP-OCT 2018. (11/20280-2)

CLAUDIANO, GUSTAVO S.; ANDRADE, SONIA C. S.; SOUZA, ELAINE C.; YUNIS-AGUINAGA, JEFFERSON; COUTINHO, LUIZ L.; MOREIRA, DEBORA K. T.; GONCALVES, FELIPE C.; MUNDIM, ANTONIO V.; MARZOCCHI-MACHADO, CLENI M.; DE MORAES, FLAVIO R.; et al. Role of neuroendocrine modulation and biochemistry in the sepsis in Piaractus mesopotamicus. General and Comparative Endocrinology, v. 288, MAR 1 2020. (11/20280-2, 14/10231-2, 15/12143-6)

MARCUSSO, PAULO FERNANDES; CLAUDIANO, GUSTAVO DA SILVA; YUNIS-AGUINAGA, JEFFERSON; MARINHO-NETO, FAUSTO DE ALMEIDA; ETO, SILAS FERNANDES; FERNANDES, DAYANNE CARLA; ROSOLEM, MAYARA CAROLINE; SALVADOR, ROGERIO; ENGRACIA DE MORAES, JULIETA RODINI; DE MORAES, FLAVIO RUAS. Immunogenicity in Oreochromis niloticus vaccinated with sonicated antigens against streptococcosis. FISH & SHELLFISH IMMUNOLOGY, v. 115, p. 134-141, AUG 2021. (13/24852-6, 12/07534-8, 11/20280-2)

MARINHO-NETO, FAUSTO A.; CLAUDIANO, GUSTAVO S.; YUNIS-AGUINAGA, JEFFERSON; CUEVA-QUIROZ, VICTOR A.; KOBASHIGAWA, KARINA K.; CRUZ, NATHAN R. N.; MORAES, FLAVIO R.; MORAES, JULIETA R. E.. Morphological, microbiological and ultrastructural aspects of sepsis by Aeromonas hydrophila in Piaractus mesopotamicus. PLoS One, v. 14, n. 9, SEP 20 2019. (11/20280-2, 14/10231-2)

CLAUDIANO, GUSTAVO S.; YUNIS-AGUINAGA, JEFFERSON; MARINHO-NETO, FAUSTO A.; MIRANDA, RENATA L.; MARTINS, ISABELA M.; OTANI, FABRIZIA S.; MUNDIM, V, ANTONIO; MARZOCCHI-MACHADO, CLENI M.; MORAES, JULIETA R. E.; DE MORAES, FLAVIO RUAS. Hematological and immune changes in Piaractus mesopotamicus in the sepsis induced by Aeromonas hydrophila. FISH & SHELLFISH IMMUNOLOGY, v. 88, p. 259-265, MAY 2019. (11/20280-2, 14/10231-2)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CLAUDIANO, Gustavo da Silva. Aspectos da fisiopatologia da sepse em Piaractus mesopotamicus induzida por Aeromonas hydrophila. 2015. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.