Spread of Multidrug-Resistant Rhodococcus equi, United States.

Spread of Multidrug-Resistant Rhodococcus equi, United States.
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DOI:
10.3201/eid2702.203030
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发表时间:
2021-03
影响因子:
11.8
通讯作者:
Vázquez-Boland JA
Vázquez-Boland JA
中科院分区:
医学2区
文献类型:
--
作者:
Álvarez-Narváez S;Giguère S;Cohen N;Slovis N;Vázquez-Boland JA

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在美国受地方性影响的马场进行大规模大环内酯类/利福平抗生素预防后,动物和人畜共患病原体马红球菌中发现了多重耐药性。获得 pRERm46 后,多重耐药 (MDR) 马罗氏菌出现了,pRERm46 是一种接合质粒,对大环内酯类、林可酰胺类、链阳菌素以及我们所描述的四环素具有抗性。系统基因组分析表明,自 2002 年首次记录以来,MDR R. equal 的患病率不断增加,这是由克隆 R. equal 2287 引起的,可归因于 pRErm46 与大环内酯/利福平治疗驱动的染色体 rpoBS531F 突变的共选择。 pRErm46 溢出到其他马基因型导致了一种新的 MDR 克隆 G2016,与独特的 rpoBS531Y 突变相关。我们的研究结果表明,动物过度使用抗菌药物预防可能会产生具有人畜共患潜力的耐多药病原体。 MDR R.Equi 和 pRErm46 介导的耐药性目前正在美国传播,并可能通过马匹运动在国际上传播。
Multidrug resistance has been detected in the animal and zoonotic human pathogen Rhodococcus equi after mass macrolide/rifampin antibioprophylaxis in endemically affected equine farms in the United States. Multidrug-resistant (MDR) R. equi emerged upon acquisition of pRERm46, a conjugative plasmid conferring resistance to macrolides, lincosamides, streptogramins, and, as we describe, tetracycline. Phylogenomic analyses indicate that the increasing prevalence of MDR R. equi since it was first documented in 2002 is caused by a clone, R. equi 2287, attributable to coselection of pRErm46 with a chromosomal rpoBS531F mutation driven by macrolide/rifampin therapy. pRErm46 spillover to other R. equi genotypes has given rise to a novel MDR clone, G2016, associated with a distinct rpoBS531Y mutation. Our findings illustrate that overuse of antimicrobial prophylaxis in animals can generate MDR pathogens with zoonotic potential. MDR R. equi and pRErm46-mediated resistance are currently disseminating in the United States and are likely to spread internationally through horse movements.
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发表时间: 2017-05-01
影响因子: 3.3
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