Experimental approach on the selection and persistence of anti-microbial-resistant Aeromonads in faecal matter of rainbow trout during and after an oxolinic acid treatment

Bris, Hervé Le; Dhaouadi, Raouf; Naviner, Magali; Giraud, Étienne; Mangion, Catherine; Armand, F.; Cotte, Nathalie; Thorin, Chantal; Ganière, Jean‐Pierre; Pouliquen, Hervé

doi:10.1016/j.aquaculture.2007.10.034

Cited by 8 publications

(5 citation statements)

References 26 publications

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“…Susceptible bacteria in the sediment and water are replaced by resistant ones [ 58 ]. Antibiotics in fish culture are usually administered via feed and the intestinal environment of fish is an optimal site for the selection of antibiotic resistant bacteria [ 62 ]. Through fish feces, antibiotic resistant bacteria are dispersed to the water column or sediments.…”

Section: Antibiotic Resistance In Aquatic Environmentmentioning

confidence: 99%

Antibacterials in Aquatic Environment and Their Toxicity to Fish

2020

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Antibacterial agents are commonly present in aquatic environment at low concentrations. Terrestrial animal farms, human medicine and aquaculture are main sources of water contamination with antibacterials. Antibiotics were proved to be directly toxic to fish causing oxidative stress, general stress response, histopathological lesions, hematological, metabolic, and reproductive disorders, as well as immunosuppressive and genotoxic effects. Environmentally realistic low concentrations of antibiotics also disturb aquatic bacterial communities causing alterations in fish symbiotic microbiota and induce emergence of antibiotic-resistant pathogenic bacteria by exerting selective pressure on spread of antibiotic-resistance genes.

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Section: Antibiotic Resistance In Aquatic Environmentmentioning

confidence: 99%

Antibacterials in Aquatic Environment and Their Toxicity to Fish

2020

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“…As detailed in the Canadian case study, a range of factors may affect flow patterns, resulting in variable and fluctuating current directions (Petrell et al 1993, Huang et al 2008, Reid et al 2010, consequently leading to complex nutrient plume dynamics in the near-field or close to structures . In addition to hydrodynamic influences from cages (Løland 1993, Helsley & Kim 2005, Lader et al 2007, Le Bris et al 2007), near-cage currents can be affected by the swimming behavior of fish (Gansel et al 2011(Gansel et al , 2014 as postulated in the Norwegian case study. The potential influence to currents and depth of fish excretion and egestion may be important considerations, not only for horizontal vectors, but also for vertical.…”

Section: Physical Processesmentioning

confidence: 99%

Discrete water quality sampling at open-water aquaculture sites: limitations and strategies

Jansen¹,

Reid²,

Bannister³

et al. 2016

Aquacult. Environ. Interact.

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While environmental performance of cage-based aquaculture is most often monitored through benthic conditions, there may also be requirements that necessitate discrete, pelagic sampling. In the pelagic realm, adequately capturing the spatial and temporal dynamics of interest and attributing causality to aquaculture processes can be extremely challenging. Conditions are seldom ideal, and data adequacy concerns of discrete samples collected at open-water aquaculture sites are not uncommon. Further exploration of these challenges is needed. Herein, we aim to explore considerations for study design, analysis, and data interpretation of discrete pelagic sampling. As examples, we present 2 case studies where limited sampling occurred under conditions of complex pelagic dynamics. A Norwegian case study quantified particle abundance around salmon farms, and aimed to highlight the effects of spatial−temporal variation on sampling design, the need for inclusion of companion parameters, and the benefits of a priori and a posteriori data interpretation strategies. A Canadian case study collected discrete samples to measure ammonium concentrations with continuous current measurements at an Integrated Multi-Trophic Aquaculture (IMTA) farm, to explore issues of complex hydrodynamics, reference site suitability, sampling resolution, data pooling, and post hoc power tests. We further discuss lessons learned and the implications of study design, ambient conditions, physical processes, farm management, statistical analysis, companion parameters, and the potential for confounding effects. Pragmatic consideration of these aspects will ultimately serve to better frame the costs and benefits of discrete pelagic sampling at open-water aquaculture sites.

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“…Investigations of antibiotic resistance and mobile resistant elements in fish/shrimp farms have been carried out in North America, 30,31 South America, 32 Europe, 33,34 Southeast Asia, 35 and Africa. 36 Integrated fish farming in which animal manures are recycled to feed freshwater fish in ponds is commonly practiced in Guangdong Province of South China 37,38 and in Southeast Asia.…”

Section: -29mentioning

confidence: 99%

Occurrence of antibiotic resistance and characterization of resistance genes and integrons in Enterobacteriaceae isolated from integrated fish farms in south China

Ying

Tao

et al. 2011

J. Environ. Monit.

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Antibiotics are still widely applied in animal husbandry to prevent diseases and used as feed additives to promote animal growth. This could result in antibiotic resistance to bacteria and antibiotic residues in animals. In this paper, Enterobacteriaceae isolated from four integrated fish farms in Zhongshan, South China were tested for antibiotic resistance, tetracycline resistance genes, sulfonamide resistance genes, and class 1 integrons. The Kirby-Bauer disk diffusion method and polymerase chain reaction (PCR) assays were carried out to test antibiotic susceptibility and resistance genes, respectively. Relatively high antibiotic resistance frequencies were found, especially for ampicillin (80%), tetracycline (52%), and trimethoprim (50%). Out of 203 Enterobacteriaceae isolates, 98.5% were resistant to one or more antibiotics tested. Multiple antibiotic resistance (MAR) was found highest in animal manures with a MAR index of 0.56. Tetracycline resistance genes (tet(A), tet(C)) and sulfonamide resistance genes (sul2) were detected in more than 50% of the isolates. The intI1 gene was found in 170 isolates (83.7%). Both classic and non-classic class 1 integrons were found. Four genes, aadA5, aadA22, dfr2, and dfrA17, were detected. To our knowledge, this is the first report for molecular characterization of antibiotic resistance genes in Enterobacteriaceae isolated from integrated fish farms in China and the first time that gene cassette array dfrA17-aadA5 has been detected in such fish farms. Results of this study indicated that fish farms may be a reservoir of highly diverse and abundant antibiotic resistant genes and gene cassettes. Integrons may play a key role in multiple antibiotic resistances posing potential health risks to the general public and aquaculture.

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Experimental approach on the selection and persistence of anti-microbial-resistant Aeromonads in faecal matter of rainbow trout during and after an oxolinic acid treatment

Cited by 8 publications

References 26 publications

Antibacterials in Aquatic Environment and Their Toxicity to Fish

Antibacterials in Aquatic Environment and Their Toxicity to Fish

Discrete water quality sampling at open-water aquaculture sites: limitations and strategies

Occurrence of antibiotic resistance and characterization of resistance genes and integrons in Enterobacteriaceae isolated from integrated fish farms in south China

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