1
|
Yunis-Aguinaga J, Sotil G, Morey GAM, Fernandez-Espinel C, Flores-Dominick V, Rengifo-Marin G, da Silva Claudiano G, Medina-Morillo M. Susceptibility of the cultured Amazonian fish, Colossoma macropomum, to experimental infection with Aeromonas species from ornamental fish. Microb Pathog 2024; 186:106461. [PMID: 38048837 DOI: 10.1016/j.micpath.2023.106461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 09/21/2023] [Accepted: 11/22/2023] [Indexed: 12/06/2023]
Abstract
The global ornamental fish trade carries important risk factors for spreading pathogens between different countries and regions, not only for ornamental fish but also for cultured fish and even other animal species. In the current study, we reported the capacity of Aeromonas veronii and A. hydrophila isolated from ornamental fish to experimentally infect the reared Amazonian fish Colossoma macropomum. For this, those bacteria were identified, and a primary characterization was performed. Fish were inoculated with 0.1 mL of increasing concentrations of A. hydrophila or A. veronii (C1 = 1 × 102; C2 = 1.8 × 104; C3 = 2.1 × 106; C4 = 2.4 × 108 bacterial cells per mL) in the coelomic cavity. In the control group, fish received the same volume of sterile saline solution (0.9 %). Fish presented petechiae, skin suffusions, and mortality rates up to 100 % according to the inoculum concentration. Histopathologically, fish presented necrosis with karyolysis, loss of the cytoplasmic delimitation of cells of the renal tubules and hepatocytes, hemorrhage, cellular edema, and the presence of bacterial cells. The LD50-96h of A. veronii on C. macropomum was estimated at 2.4 × 106 CFU mL-1 and of A. hydrophila at 1.408 × 105 CFU mL-1. The results demonstrated that it is possible that Aeromonas species isolated from ornamental fish affect C. macropomum, causing similar clinical signs and lesions. This shows the importance of promoting risk control measures worldwide regarding the trade of ornamental fish.
Collapse
Affiliation(s)
- Jefferson Yunis-Aguinaga
- Laboratorio de Patobiología Acuática, Instituto del Mar del Perú (IMARPE), Callao, Peru; Universidad Científica del Sur, Lima, Peru.
| | - Giovanna Sotil
- Laboratorio de Genética Molecular, Instituto del Mar del Perú (IMARPE), Callao, Peru; Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - German Augusto Murrieta Morey
- Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Peru; Universidade Estadual do Maranhão- UEMA, Programa de Pós-graduação em Ciência Animal - PPGCA, São Luís, Maranhão- Brasil
| | | | | | - Gino Rengifo-Marin
- Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Peru
| | | | - Marco Medina-Morillo
- Laboratorio de Patobiología Acuática, Instituto del Mar del Perú (IMARPE), Callao, Peru.
| |
Collapse
|
2
|
Reis FYT, Rocha VP, Janampa-Sarmiento PC, Costa HL, Egger RC, Passos NC, de Assis CHS, Carneiro SP, Santos ÁF, Silva BA, Dorella FA, Leibowitz MP, Luz RK, Pierezan F, Gallani SU, Tavares GC, Figueiredo HCP. Edwardsiella tarda in Tambaqui ( Colossoma macropomum): A Pathogenicity, Antimicrobial Susceptibility, and Genetic Analysis of Brazilian Isolates. Animals (Basel) 2023; 13:2910. [PMID: 37760310 PMCID: PMC10526069 DOI: 10.3390/ani13182910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/06/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Edwardsiella tarda is a crucial pathogenic bacterium in tropical aquaculture. This bacterium was recently isolated from tambaqui (Colossoma macropomum), a commercially important fish species in Brazil. This study assessed the antimicrobial susceptibility, pathogenicity, and genetic diversity of the tambaqui-derived E. tarda isolates. Fourteen bacterial isolates isolated from tambaqui were identified as E. tarda by using matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry and dnaJ gene sequencing. Antimicrobial susceptibility tests were conducted against seven drugs using the disc diffusion assay. The pathogenicity test conducted by intraperitoneal injection of 2.4 × 107 colony-forming units (CFU) fish-1 of E. tarda (ED38-17) into tambaqui juveniles eventually revealed that neither clinical signs nor death were present. However, splenomegaly and whitish areas in the spleen and kidneys were observed. The histological investigation also revealed granulomatous splenitis, nephritis, and hepatitis occurring internally. Repetitive extragenic palindromic-PCR fingerprinting separated the 14 isolates into three genetic groups. The antibiogram revealed that all E. tarda isolates were wild-type (WT) to florfenicol (FLO), norfloxacin (NOR), neomycin (NEO), erythromycin (ERY), and oxytetracycline (OXY); however, some were non-wild-type to sulfamethoxazole/trimethoprim (7.1%) and amoxicillin (21.4%). Therefore, through experimental infection, E. tarda ED38-17 could induce pathogenic effects in C. macropomum. Additionally, three distinct genetic types were found, and the E. tarda isolates were WT to FLO, NOR, NEO, ERY, and OXY. These findings raise awareness of a bacteria causing unseen lesions, a pathogen that will potentially impact tambaqui aquaculture in the future.
Collapse
Affiliation(s)
- Francisco Yan Tavares Reis
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Victória Pontes Rocha
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Peter Charrie Janampa-Sarmiento
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Henrique Lopes Costa
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Renata Catão Egger
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Naísa Cristine Passos
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Carlos Henrique Santos de Assis
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Sarah Portes Carneiro
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Ágna Ferreira Santos
- Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Brendhal Almeida Silva
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Fernanda Alves Dorella
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Márcia Pimenta Leibowitz
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Ronald Kennedy Luz
- Department of Animal Science, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Felipe Pierezan
- Department of Veterinary Clinics and Surgery, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Sílvia Umeda Gallani
- Postgraduate Program in Aquaculture, Nilton Lins University, Manaus 69058-030, AM, Brazil
| | - Guilherme Campos Tavares
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| | - Henrique César Pereira Figueiredo
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Federal University of Minas Gerais, Belo Horizonte 31270-901, MG, Brazil; (F.Y.T.R.); (V.P.R.)
| |
Collapse
|
3
|
Sebastião FA, Majolo C, Martins VFS, Boijink CL, Brandão FR, Pereira SLA, Fujimoto RY, Chagas EC. Antimicrobial resistance profile of Aeromonas spp. isolated from asymptomatic Colossoma macropomum cultured in the Amazonas State, Brazil. BRAZ J BIOL 2023; 82:e260773. [PMID: 36629538 DOI: 10.1590/1519-6984.260773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 08/20/2022] [Indexed: 01/11/2023] Open
Abstract
Bacterial diseases are important factors that limit productivity in aquaculture. To reduce negative economic impacts, fish farmers use antimicrobials, often indiscriminately, and this action has led to bacterial resistance to drugs. The objectives of this study were to isolate and identify the main putative pathogenic bacterial species in tambaqui (Colossoma macropomum), establish the profile of resistance to antimicrobials by the methods of disc diffusion, and determine the minimum inhibitory concentration (MIC) values. Two hundred and ninety asymptomatic fish were collected between March and November 2015 from ten fish farms in the Amazonas state (Brazil). Of the total strains recovered from tambaqui, seven were identified as Aeromonas spp. by sequencing the 16S rRNA gene. These seven isolates showed resistance to ampicillin, 28% to erythromycin, and 28% to sulfonamide. Additionally, the seven isolates showed a MIC higher than the range evaluated for amoxicillin, penicillin, novobiocin, tylosin tartrate, and clindamycin, and 85% showed resistance to erythromycin. The results of this study indicate the need to increase the awareness of fish farmers and, most importantly, the government, about the lack of drug regulations for use in aquaculture, and good management practices, so the indiscriminate prophylactic and systemic use of antimicrobials be inhibited.
Collapse
Affiliation(s)
- F A Sebastião
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil.,Universidade Federal do Amazonas, Programa de Pós-graduação em Ciência Animal e Recursos Pesqueiros, Manaus, AM, Brasil
| | - C Majolo
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil
| | - V F S Martins
- Universidade Federal do Amazonas, Laboratório de Ictiologia e Ordenamento Pesqueiro, Humaitá, AM, Brasil
| | - C L Boijink
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil
| | - F R Brandão
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil
| | | | - R Y Fujimoto
- Embrapa Tabuleiros Costeiros, Aracaju, SE, Brasil
| | - E C Chagas
- Embrapa Amazônia Ocidental, Manaus, AM, Brasil
| |
Collapse
|
4
|
Abdel-Latif HMR, Shukry M, Abd-Elaziz RA. Clinico-pathological findings and expression of inflammatory cytokines, apoptosis, and oxidative stress-related genes draw mechanistic insights in Nile tilapia reared under ammonia-N exposure and Aeromonas hydrophila challenge. FISH & SHELLFISH IMMUNOLOGY 2022; 127:1-12. [PMID: 35667539 DOI: 10.1016/j.fsi.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/07/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
Fish diseases have a "stress-related" nature, whereas fish exposure to stressors will increase their susceptibility to infections. It was also noted that fish exposure to biotic and abiotic stressors would exaggerate the disease signs, elicit high mortalities, and cause severe economic losses. Motile aeromonad septicemia (MAS) is a major bacterial disease affecting a variety of finfish species throughout the globe and is caused by Aeromonas hydrophila. Herein, we have evaluated the impacts of ammonia-N stress and/or Nile tilapia challenge with pathogenic A. hydrophila on the clinical picture of MAS disease. Clinical signs, postmortem lesions, histoarchitectural changes, and gene transcription analysis were studied. Fish experimentally infected with A. hydrophila were exophthalmic and showed darkened skin. Moreover, opercular hyperemia, petechial hemorrhages, and gill congestion alongside dermal ulcerations were noticed in ammonia-exposed fish. On the other side, fish exposed to both stressors exhibited exophthalmia, corneal opacity, severe dropsy, and hemorrhagic dermal ulcerations. At the tissue levels, the histopathological lesions were exaggerated in the fish group exposed to ammonia stress and challenged with A. hydrophila than fish group exposed to each one alone. At the molecular levels, the mRNA expression analysis reveals significant upregulation of inflammatory cytokines such as interleukin-1 beta, CXC chemokine, and tumor necrosis factor-alpha in the kidney tissues of Nile tilapia exposed to ammonia and/or challenged with A. hydrophila. In a similar trend, the mRNA expression values of heat shock protein 70 (HSP70), oxidative stress related genes (SOD and CAT) and apoptosis-related genes (caspase 3, BAX, and cytochrome P450) were also increased in the hepatic tissues of fish exposed to singular or dual stressors. Interestingly, the highest expression levels of the above-mentioned genes were found in the fish group exposed to both stressors. Taken together, these findings indicate the occurrence of severe inflammatory and apoptotic changes in fish exposed to ammonia and infected with A. hydrophila more than each one alone. In contrast, there was a significant decrease in the expression values of the antioxidant enzyme glutathione-S-transferase (GST) in stressed fish, suggesting the occurrence of oxidative stress. This study will be helpful to draw mechanistic insights into the exposure of fish to ammonia stress and infection with A. hydrophila.
Collapse
Affiliation(s)
- Hany M R Abdel-Latif
- Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, Alexandria University, 22758, Alexandria, Egypt.
| | - Mustafa Shukry
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt
| | - Rehab A Abd-Elaziz
- Fish Diseases Department, Alexandria Provincial Lab, Animal Health Research Institute (AHRI), Agriculture Research Center (ARC), Egypt
| |
Collapse
|
5
|
Prospecting of essential oils in combination with florfenicol against motile Aeromonas isolated from tambaqui (Colossoma macropomum). Arch Microbiol 2022; 204:392. [PMID: 35704068 DOI: 10.1007/s00203-022-03015-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/22/2022] [Indexed: 11/02/2022]
Abstract
Natural products with antimicrobial activity and their association with synthetic antimicrobials are a sustainable option in fish farming. The objective of this study was to determine antimicrobial activity, antibiofilm potential and synergism of five essential oils (EOs) with florfenicol against motile Aeromonas isolated from Amazonian Colossoma macropomum. As their major constituent, the EOs of the species of Aloysia triphylla, Croton cajucara (red and white morphotype), Cymbopongo citratus and Lippia gracilis present β-pinene (22.1%), germacrene D (11.5%), linalool (23%), geranial (45.7%) and carvacrol (42.2%), respectively. The EOs of L. gracilis and C. citratus showed the best antimicrobial activities against the Aeromonas strains (5 mg mL-1). All EOs interfered with biofilm formation and consolidated biofilm. The EOs of A. triphylla, C. citratus and L. gracilis showed a synergistic effect with florfenicol, reducing the amount of the chemical into the water systems while treatment.
Collapse
|
6
|
Kumar CB, Kumar A, Rathore G. Antibacterial activity of palmarosa oil significantly varies between Aeromonas veronii and Aeromonas caviae and exhibits selective action on tetracycline and sulfonamide resistant A. caviae. J Appl Microbiol 2022; 132:4321-4329. [PMID: 35355377 DOI: 10.1111/jam.15551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/03/2022] [Accepted: 03/21/2022] [Indexed: 11/27/2022]
Abstract
AIMS To investigate the antibacterial activity of three (palmarosa, basil and rosemary) essential oils (EOs) on Aeromonas veronii and A. caviae, and determine Minimum Inhibitory Concentration (MIC) of potent EO against tetracycline and sulfonamide resistant strains. METHODS AND RESULTS Palmarosa oil (PMO) showed the significantly (p < 0.05) higher inhibition zones against both A. veronii and A. caviae (n=30) than basil and rosemary in the disk diffusion assay. The MIC (% v/v) of PMO ranged from 0.008% to 1.00%. The mean MIC was significantly higher for A. caviae (0.48 ± 0.24%) than A. veronii (0.21 ± 0.15%). Further, the MIC of PMO was compared in six groups: Group 1: Tetracycline Resistant A. veronii (TRV); Group 2: Tetracycline Resistant A. caviae (TRC); Group 3: Sulfonamide Resistant A. veronii (SRV); Group 4: Sulfonamide Resistant A. caviae (SRC); Group 5: Susceptible A. veronii (SV) and Group 6: Susceptible A. caviae (SC). No significant differences were observed between overall resistant (TRV+ SRV) and susceptible A. veronii (SV). However, in A. caviae, the resistant group had a lower MIC than the susceptible group. Moreover, the MIC was significantly lower for TRC (0.31 ± 0.11%) as compared to SRC (0.46 ± 0.10%). The time of kill of PMO for both the species of Aeromonas was 20-30 min. CONCLUSION Palmarosa oil exhibited significantly higher activity on A. veronii than A. caviae. The resistant strains of A. caviae were inhibited at a lower concentration than susceptible strains. SIGNIFICANCE AND IMPACT OF THE STUDY Palmarosa oil could be explored as an alternative antimicrobial agent for mitigating antimicrobial resistance and managing Aeromonas infection in fish and their risks to public health.
Collapse
Affiliation(s)
- Chandra Bhushan Kumar
- ICAR-National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Telibagh, Lucknow, U.P, India
| | - Anil Kumar
- ICAR-National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Telibagh, Lucknow, U.P, India
| | - Gaurav Rathore
- ICAR-National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Telibagh, Lucknow, U.P, India
| |
Collapse
|
7
|
Majolo C, Bizzo HR, Rodrigues Brandão F, da Silva AMS, Campos Chagas E, Chaves FCM, Muniz AW. Chemical composition of Lippia Linn. (Verbenaceae) essential oils and their antibacterial potential against Aeromonas spp. isolates from Colossoma macropomum. JOURNAL OF ESSENTIAL OIL RESEARCH 2022. [DOI: 10.1080/10412905.2022.2036642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | - Franmir Rodrigues Brandão
- Programa de Pós Graduação em Ciências Pesqueiras nos Trópicos, Universidade Federal do Amazonas, Manaus, Brazil
| | - Ana Maria Souza da Silva
- Programa de Pós Graduação em Ciências Animal e Recursos Pesqueiros, Universidade Federal do Amazonas, Manaus, Brazil
| | | | | | | |
Collapse
|
8
|
Gallani SU, Valladão GMR, Alves LDO, Jesus RBD, Kotzent S, Hashimoto DT, Wiegertjes G, Pilarski F. ETosis in tambaqui Colossoma macropomum: A programmed cell death pathway and approach of leukocytes immune response. Microb Pathog 2021; 155:104918. [PMID: 33930420 DOI: 10.1016/j.micpath.2021.104918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 01/21/2023]
Abstract
Tambaqui Colossoma macropomum is the most cultivated native fish in South America and Aeromonas hydrophila is one of the main bacteria infecting tropical fish. Despite the economic importance of this round fish, to date, there has been a paucity of investigations into haematological changes in tambaqui. In this study, detailed blood analyses (0 h, 6 h, 24 h, 7 d and 14 d) following intraperitoneal challenge with A. hydrophila were performed. After analysing the results, there was a suspicion of a novel cell death mechanism via extracellular traps (ETosis) in tambaqui. The search for ETosis was based on differential interference contrast (DIC) microscopy and scanning electron microscopy (SEM) assays through application of an adapted protocol applying co-incubation of leukocytes with A. hydrophila. The cells were investigated at: 0 h (control), 4 h and 7 h after incubation. The complete haemogram profile showed an uncommon severe leukopenia in early phases of infection (6 h, p < 0.001 and ≤ 0.05), due to significant decreases in the three main leukocytes: lymphocytes (6 h, p ≤ 0.001), monocytes (6 h, p ≤ 0.05) and neutrophils (6 h and 24 h, p ≤ 0.01 and p ≤ 0.05). Leucocytosis and lymphocytosis (p ≤ 0.01) were ascertained only 7 days post-infection. Through DIC and SEM, we discovered that leukocyte suicide exposed the nuclear contents between 4 and 7 h after stimuli with bacteria. The leukogram profile associated with DIC and SEM analyses suggested that tambaqui leukocytes underwent a programmed death (ETosis) in order to expose chromatin and granule proteins as a trap to bind and then kill bacteria; thus, preventing A. hydrophila from spreading and resulting in leukopenia during the early phase of bacterial infection. In this paper, we presume that ETosis is one of the last resources for tambaqui to contain the infection, and after this leukocyte strategy, a high number of phagocytic cells are produced and released into the peripheral circulation.
Collapse
Affiliation(s)
- Sílvia Umeda Gallani
- Nilton Lins University (UNL), Laboratory of Microbiology Applied to Aquatic Organisms, Amazonas, 69058-030, Brazil.
| | - Gustavo Moraes Ramos Valladão
- Nilton Lins University (UNL), Laboratory of Parasitology and Pathology of Aquatic Organisms, Amazonas, 69058-030, Brazil.
| | - Lindomar de Oliveira Alves
- São Paulo State University (UNESP), Aquaculture Center of UNESP, Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo, 14884-900, Brazil.
| | - Raphael Barbetta de Jesus
- São Paulo State University (UNESP), Aquaculture Center of UNESP, Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo, 14884-900, Brazil.
| | - Suzana Kotzent
- São Paulo State University (UNESP), Aquaculture Center of UNESP, Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo, 14884-900, Brazil.
| | - Diogo Teruo Hashimoto
- São Paulo State University (UNESP), Aquaculture Center of UNESP, Laboratory of Aquaculture Genetics and Conservation, São Paulo, 14884-900, Brazil.
| | - Geert Wiegertjes
- Wageningen University & Research (WUR), Aquaculture and Fisheries Group, Wageningen, 6708WD, the Netherlands.
| | - Fabiana Pilarski
- São Paulo State University (UNESP), Aquaculture Center of UNESP, Laboratory of Microbiology and Parasitology of Aquatic Organisms, São Paulo, 14884-900, Brazil.
| |
Collapse
|
9
|
Patterns of the innate immune response in tambaqui Colossoma macropomum: Modulation of gene expression in haemorrhagic septicaemia caused by Aeromonas hydrophila. Microb Pathog 2020; 150:104638. [PMID: 33242647 DOI: 10.1016/j.micpath.2020.104638] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/15/2020] [Accepted: 11/16/2020] [Indexed: 11/23/2022]
Abstract
The production of tambaqui Colossoma macropomum has recently reached a milestone, being considered the main native species produced in South American continental waters. Despite the importance of this fish, its immunity is not well understood. In this study we established some patterns of innate immunity for the species via two experiments. Both studies evaluated the fish in the absence (intraperitoneal saline) or presence (intraperitoneal, 3 x 107 CFU/mL of Aeromonas hydrophila at 0.1 mL/10 g of living weight) of infection at 5 points over time-course of 14 days (0 h, 6 h, 24 h, 7 d, 14 d). In the first experiment, the partial gene sequences and gene expression of IL-1β, IRAK-1, C3, C4, lysozyme, IL-10, HSP70 and β-actin were determined in the main secondary lymphoid organs of fish: the spleen and head kidney. The second study was performed to analyse the alternative complement pathway ACH50 in serum to support the elucidation of C3 gene expression. Results of the gene expression assays showed a tendency towards up-regulation of immune genes in infected fish in early phases of infection (mostly around 6 h and 24 h) and in the chronic phase (7 d and 14 d), with the exception of HSP70 which showed a down-regulation in infected fish. Our results also suggested that lysozyme was evolved in both pro- and anti-inflammatory activities. For genes of the complement system, it was demonstrated that C4 regulation followed the tendency of pro-inflammatory genes. However, the C3 gene was, surprisingly, not expressed in most fish and this corroborated with the results of the complement system activity in serum that also did not show activity in most fish. The possible reasons for the regulation of gene expression and association with fish disease are addressed in this paper.
Collapse
|