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Emergence of new variants of antibiotic resistance genomic islands among multidrug-resistant Salmonella enterica in poultry.
Environmental Microbiology ( IF 4.3 ) Pub Date : 2019-11-25 , DOI: 10.1111/1462-2920.14858
Emiliano Cohen 1 , Maya Davidovich 2 , Assaf Rokney 2 , Lea Valinsky 2 , Galia Rahav 1, 3 , Ohad Gal-Mor 1, 3, 4
Affiliation  

Non-typhoidal Salmonella enterica (NTS) are diverse and important bacterial pathogens consisting of more than 2600 different serovars, with varying host-specificity. Here, we characterized the poultry-associated serovars in Israel, analysed their resistome and illuminated the molecular mechanisms underlying common multidrug resistance (MDR) patterns. We show that at least four serovars including Infantis, Muenchen, Newport and Virchow present a strong epidemiological association between their temporal trends in poultry and humans. Worrisomely, 60% from all of the poultry isolates tested (n = 188) were multidrug resistant, mediated by chromosomal SNPs and different mobile genetics elements. A novel streptomycin-azithromycin resistance island and previously uncharacterized versions of the mobilized Salmonella genomic island 1 (SGI1) were identified and characterized in S. Blockley and S. Kentucky isolates respectively. Moreover, we demonstrate that the acquisition of SGI1 does not impose fitness cost during growth under nutrient-limited conditions or in the context of Salmonella infection in the mouse model. Overall, our data emphasize the role of the poultry production as a pool of specific epidemic MDR strains and autonomous genetic elements, which confer resistance to heavy metals and medically relevant antibiotics. These are likely to disseminate to humans via the food chain and fuel the increasing global antibiotic resistance crisis.

中文翻译:

家禽中多重耐药性沙门氏菌中抗生素耐药性基因组岛的新变体的出现。

非伤寒沙门氏菌(NTS)是多种重要细菌病原体,由2600多种不同血清型组成,具有不同的宿主特异性。在这里,我们对以色列家禽相关的血清型进行了鉴定,分析了它们的抵抗力,并阐明了常见的多重耐药性(MDR)模式的分子机制。我们显示,至少有4个血清型,包括Infantis,Muenchen,Newport和Virchow,在家禽和人类的时态趋势之间呈现出很强的流行病学关联。令人担忧的是,所有测试的家禽分离株(n = 188)中有60%是多药抗性的,由染色体SNP和不同的移动遗传学元件介导。一个新的链霉素-阿奇霉素抗性岛和动员的沙门氏菌基因组岛1(SGI1)的以前未表征的版本分别在S. Blockley和S. Kentucky分离物中鉴定并鉴定。此外,我们证明,在小鼠模型中,在营养有限的条件下或沙门氏菌感染的情况下,在生长过程中获得SGI1不会增加健身成本。总体而言,我们的数据强调了家禽生产作为特定流行性MDR菌株和自主遗传元素的集合的作用,这些赋予了对重金属和医学相关抗生素的抗性。这些很可能通过食物链传播给人类,并加剧了日益严重的全球抗生素耐药性危机。我们证明,SGI1的获得不会在营养受限的条件下生长或在小鼠模型中沙门氏菌感染的情况下增加健身成本。总体而言,我们的数据强调了家禽生产作为特定流行性MDR菌株和自主遗传元件的集合所起的作用,这赋予了对重金属和医学相关抗生素的抗性。这些很可能通过食物链传播给人类,并加剧了日益严重的全球抗生素耐药性危机。我们证明,SGI1的获得不会在营养受限的条件下生长或在小鼠模型中沙门氏菌感染的情况下增加健身成本。总体而言,我们的数据强调了家禽生产作为特定流行性MDR菌株和自主遗传元素的集合的作用,这些赋予了对重金属和医学相关抗生素的抗性。这些很可能通过食物链传播给人类,并加剧了日益严重的全球抗生素耐药性危机。赋予对重金属和医学相关抗生素的抗性。这些很可能通过食物链传播给人类,并加剧了日益严重的全球抗生素耐药性危机。赋予对重金属和医学相关抗生素的抗性。这些很可能通过食物链传播给人类,并加剧了日益严重的全球抗生素耐药性危机。
更新日期:2020-01-02
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