Tag: Antibiotic resistance

Outer membrane permeability and antibiotic resistance

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Author: Delcour, A.H. Description: To date most antibiotics are targeted at intracellular processes, and must be able to penetrate the bacterial cell envelope. In particular, the outer membrane of gram-negative bacteria provides a formidable barrier that must be overcome. There are essentially two pathways that antibiotics can take through the outer membrane: a lipid-mediated pathway for hydrophobic antibiotics, and general diffusion porins for hydrophilic antibiotics. The lipid and protein compositions of the outer membrane have a strong impact on the sensitivity of bacteria to many types of antibiotics, and drug…

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Petroleum exploitation enriches the sulfonamide resistance gene sul2 in offshore sediments

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Author: Wang, Jing; Zhou, Jiti Description: Antibiotic resistance genes (ARGs) have been considered as emerging contaminants in nature owing to their wide distribution and human health risk. Anthropogenic activities can increase the diversity and abundance of ARGs and promote their spread in environment. Offshore environment is affected by multiple types of anthropogenic activities, of which excessive accumulation of petroleum substances poses a serious threat. Our previous experimental study has demonstrated that petroleum can increase the abundance of sulfonamide resistance genes (SRGs) in the seawater through horizontal gene transfer. However, the…

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