Temperature and Nutrient Limitations Decrease Transfer of Conjugative IncP-1 Plasmid pKJK5 to Wild Escherichia coli Strains

被引:30
|
作者
Pallares-Vega, Rebeca [1 ,2 ]
Macedo, Goncalo [1 ,3 ]
Brouwer, Michael S. M. [4 ]
Leal, Lucia Hernandez [1 ]
van der Maas, Peter [5 ]
van Loosdrecht, Mark C. M. [2 ]
Weissbrodt, David G. G. [2 ]
Heederik, Dick [6 ]
Mevius, Dik [3 ,4 ]
Schmitt, Heike [1 ,3 ,6 ]
机构
[1] Wetsus, European Ctr Excellence Sustainable Water Technol, Leeuwarden, Netherlands
[2] Delft Univ Technol, Dept Biotechnol, Delft, Netherlands
[3] Univ Utrecht, Fac Vet Med, Dept Infect Dis & Immunol, Utrecht, Netherlands
[4] Wageningen Biovet Res, Dept Bacteriol & Epidemiol, Lelystad, Netherlands
[5] Univ Appl Sci, Van Hall Larenstein, Leeuwarden, Netherlands
[6] Univ Utrecht, Inst Risk Assessment Sci, Utrecht, Netherlands
基金
欧盟地平线“2020”;
关键词
horizontal gene transfer; antimicrobial resistance; synthetic wastewater; soil extract agar; environmental conditions; AMR; WATER TREATMENT PLANTS; LATERAL GENE-TRANSFER; HORIZONTAL TRANSFER; RESISTANCE PLASMIDS; MERCURY RESISTANCE; HOST-RANGE; IN-SITU; EFFICIENCY; BACTERIA; PERMISSIVENESS;
D O I
10.3389/fmicb.2021.656250
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Plasmid-mediated dissemination of antibiotic resistance among fecal Enterobacteriaceae in natural ecosystems may contribute to the persistence of antibiotic resistance genes in anthropogenically impacted environments. Plasmid transfer frequencies measured under laboratory conditions might lead to overestimation of plasmid transfer potential in natural ecosystems. This study assessed differences in the conjugative transfer of an IncP-1 (pKJK5) plasmid to three natural Escherichia coli strains carrying extended-spectrum beta-lactamases, by filter mating. Matings were performed under optimal laboratory conditions (rich LB medium and 37 degrees C) and environmentally relevant temperatures (25, 15 and 9 degrees C) or nutrient regimes mimicking environmental conditions and limitations (synthetic wastewater and soil extract). Under optimal nutrient conditions and temperature, two recipients yielded high transfer frequencies (5 x 10(-1)) while the conjugation frequency of the third strain was 1000-fold lower. Decreasing mating temperatures to psychrophilic ranges led to lower transfer frequencies, albeit all three strains conjugated under all the tested temperatures. Low nutritive media caused significant decreases in transconjugants (-3 logs for synthetic wastewater; -6 logs for soil extract), where only one of the strains was able to produce detectable transconjugants. Collectively, this study highlights that despite less-than-optimal conditions, fecal organisms may transfer plasmids in the environment, but the transfer of pKJK5 between microorganisms is limited mainly by low nutrient conditions.
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页数:13
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