由耐抗生素海洋细菌携带的质粒。

Plasmids carried by antibiotic-resistant marine bacteria.

作者信息

Sizemore R K, Colwell R R

出版信息

Antimicrob Agents Chemother. 1977 Sep;12(3):373-82. doi: 10.1128/AAC.12.3.373.

DOI:10.1128/AAC.12.3.373

PMID:334064

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC429921/

Abstract

Antibiotic-resistant bacteria were isolated from seawater samples collected in the Atlantic Ocean off the southeastern coast of the United States. Large numbers of antibiotic-resistant bacterial strains were found to be present in harbor and inshore waters; however, the percentage of resistant strains was higher for several seawater samples collected offshore than for those collected near shore. Bacteria resistant to tetracycline, chloramphenicol, and streptomycin were found in nearly all samples collected, including samples from 200 miles (about 522 km) offshore and at depths to 8,200 m. Sediment samples, in general, were found to contain smaller populations of resistant strains as compared with the seawater samples examined. Antibiotic-resistant bacteria exhibiting phenetic characteristics common to autochthonous marine bacterial species were examined in detail, and several of the isolates exhibited unstable antibiotic resistance, which was transferable to recipient Escherichia coli cells. Deoxyribonucleic acid preparations from 10 strains examined by ethidium bromide-cesium chloride density sedimentation revealed that 6 of the strains contained covalently closed circular plasmid deoxyribonucleic acid.

摘要

从美国东南海岸外大西洋采集的海水样本中分离出了耐抗生素细菌。在港口和近岸水域发现了大量耐抗生素菌株；然而，与近岸采集的海水样本相比，在离岸采集的几个海水样本中，耐药菌株的百分比更高。在几乎所有采集的样本中都发现了对四环素、氯霉素和链霉素耐药的细菌，包括离岸200英里（约522公里）以及深度达8200米处采集的样本。总体而言，与所检测的海水样本相比，沉积物样本中耐药菌株的数量较少。对表现出本地海洋细菌物种常见表型特征的耐抗生素细菌进行了详细检查，其中一些分离株表现出不稳定的抗生素抗性，这种抗性可转移到受体大肠杆菌细胞中。通过溴化乙锭-氯化铯密度沉降法对10株菌株进行的脱氧核糖核酸制备显示，其中6株含有共价闭合环状质粒脱氧核糖核酸。

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本文引用的文献

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