Aeromonas veronii isolated from climbing perch (Anabas testudineus) suffering from epizootic ulcerative syndrome (EUS)

Ehsan, Rakib; Rahman, Ashikur; Paul, Sulav Indra; Ador, Md. Ali Arman; Haque, Md. Shameul; Akter, Tasmina; Rahman, Mohammad Mafizur

doi:10.1016/j.aaf.2021.11.005

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…At scanning electron microscopy, short flagellated rods were observed. The histopathological observations of different degrees of hyperemia, hemorrhage, degeneration, and necrosis in parenchymal organs such as the liver, spleen, and kidney were similar to the pathological changes observed by previous reports on A. veronii-infected channel catfish [19].…”

Section: Discussionsupporting

confidence: 88%

Isolation, Identification, and Pathogenicity of Aeromonas veronii, the Causal Agent of Hemorrhagic Septicemia in Channel Catfish (Ictalurus punctatus) in China

Qin

et al. 2022

Fishes

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Herein, we isolated the pathogenic strain ZZ051 from hemorrhagic channel catfish (Ictalurus punctatus). Physiological and biochemical identification, 16S rRNA gene sequence analysis, and MALDI-TOF-MS showed that the ZZ051 strain was Aeromonas veronii. After artificial infection, the diseased fish showed symptoms similar to the natural disease, and the characteristics of the bacteria reisolated from the tissues were the same as those of the original infection, indicating that the isolated strain ZZ051 was the pathogen responsible for the channel catfish disease. The ZZ051 isolate was highly sensitive to enrofloxacin but resistant to florfenicol. This study provided a theoretical basis for preventing and controlling hemorrhagic disease in channel catfish.

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Section: Discussionsupporting

confidence: 88%

Isolation, Identification, and Pathogenicity of Aeromonas veronii, the Causal Agent of Hemorrhagic Septicemia in Channel Catfish (Ictalurus punctatus) in China

Qin

et al. 2022

Fishes

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“…This study highlighted that the MP3 strain of A. veronii showed high β-hemolytic phenotypic growth on the blood agar supplemented with sheep blood, which indicated its pathogenicity towards fish species. Similarly, the A. veronii isolated from diseased Anabas testudineus showed β-hemolytic activity that has been reported previously [19]. The wide use of antibiotic doses resulted in antimicrobial resistance to pathogenic bacteria [55].…”

Section: Discussionsupporting

confidence: 70%

“…A. veronii is known for causing pandemics and epidemics in f water fishes, resulting in significant economic loss to the aquaculture sector [11][12][13][14] clinical signs of A. veronii infection include ulceration, abdominal distention, exoph mia, hemorrhagic septicemia and fin rot [15,16]. As previously reported, A. veroni been isolated from several fish species, Micropterus salmoides [17], Carassius auratus g [18], Anabas testudinues [19], Leiocassis longirostris gunther [20], C. auratus, Cyprinus c Ctenopharyngodon idella, Silurus asotus [21], Channa argus [22], catfish [23], Ictalurus pu tus [24], Astronotus ocellatus [25], Poecilia reticulate [26] and Misgurnus anguillicaudatus The virulence factors play a pivotal role in the pathogenesis of bacterium in fish sp [28][29][30]. Recently a new strain of A. veronii was characterized, isolated from diseas rohita based on the NGS approach revealing the whole genome sequence of the bac [31].…”

Section: Introductionmentioning

confidence: 79%

Aeromonas veronii Is a Lethal Pathogen Isolated from Gut of Infected Labeo rohita: Molecular Insight to Understand the Bacterial Virulence and Its Induced Host Immunity

et al. 2023

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A case of severe mortality in farmed Labeo rohita was investigated to characterize the causative agent. We identified the bacterial strain as Aeromonas veronii isolated from the gut of infected L. rohita by biochemical assay, scanning electron microscopy and 16S rRNA gene sequence analysis. The in vivo challenge experiment showed that the LD50 of A. veronii was 2.2 × 104 CFU/fish. Virulence gene investigation revealed that the isolated A. veronii possesses Aerolysin, Cytotoxic enterotoxin, Serine protease, Dnase and Type III secretion system genes. The isolated strain was resistant to two antibiotics (ampicillin and dicloxacillin) while susceptible to 22 other antibiotics. The study further revealed that A. veronii induced both stresses along with non-specific and specific immune responses marked by elevated cortisol HSP70, HSP90 and IgM levels in the treated L. rohita fingerlings. Although the bacterial pathogen enhances the immune response, the negative effect on fish, including stress, and high mortality, create concern and a need for A. veronii management in L. rohita farms. The knowledge gained from this study would facilitate future research aimed at assessing the pathogenicity of A. veronii, with an emphasis on microbial disease management in other farmed fish species.

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Development of Pangasius hypophthalmus polyculture production in Pakistan when cultured with freshwater and Chinese carps

et al. 2023

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Pond-based aquaculture has developed as the main aquaculture system and plays a pivotal role in providing food sh, nutrition, incomes, and livelihoods for various value-chain actors in Pakistan. However, this technology is mainly used in intensive monoculture and little knowledge is available on polyculture approaches in Pakistan. Therefore, this study was conducted to evaluate the growth and production of sh at the different species composition in polyculture.The experiment was conducted for 90 days at the department of Fisheries and Aquaculture UVAS, Lahore, Pakistan. There were three treatments each with three replications. In all treatments, the stocking density was similar at different species compositions. All the ponds were subjected to the same regime of feeding and fertilization. Fortnightly random sampling was done to adjust the feeding rate. In this study, the Pangasius hypothalamus, showed signi cant variations with a nal weight of 385.34 g, in T 1 , and 318.50 g, in T 3 compared to others. %weight gain and % SGR of pangasius were comparatively higher among other shes in T 1 and T 3 . FCR of pangas was recorded as 1.9, in T 1 , and 1.30, in T 3, respectively which shows a better result as compared to the control and other groups. In addition, the polyculture of the pangas in uenced the nitrate level which was increased in the high-density group as compared to low density and control. At the end of the trial, we observed the cortisol and glucose levels which showed non-signi cant variations among all treatments, which is a positive indicator that there was not any stress on pangasius in the polyculture system. Due to positive effects on growth parameters, it is concluded that the polyculture of pangas with only Indian and mixed (Indian and Chinese carp) could be tried to enhance the economic bene ts in Pakistan.

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Aeromonas veronii isolated from climbing perch (Anabas testudineus) suffering from epizootic ulcerative syndrome (EUS)

Cited by 4 publications

References 39 publications

Isolation, Identification, and Pathogenicity of Aeromonas veronii, the Causal Agent of Hemorrhagic Septicemia in Channel Catfish (Ictalurus punctatus) in China

Isolation, Identification, and Pathogenicity of Aeromonas veronii, the Causal Agent of Hemorrhagic Septicemia in Channel Catfish (Ictalurus punctatus) in China

Aeromonas veronii Is a Lethal Pathogen Isolated from Gut of Infected Labeo rohita: Molecular Insight to Understand the Bacterial Virulence and Its Induced Host Immunity

Development of Pangasius hypophthalmus polyculture production in Pakistan when cultured with freshwater and Chinese carps

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