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Essential oils modulate virulence phenotypes in a multidrug-resistant pyomelanogenic Pseudomonas aeruginosa clinical isolate.
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Pyomelanogenic P. aeruginosa, frequently isolated from patients with urinary tract infections and cystic fibrosis, possesses the ability to withstand oxidative stress, contributing to virulence and resulting in persistent infections. Whole genome sequence analysis of U804, a pyomelanogenic, multidrug-resistant, clinical isolate, demonstrates the mechanism underlying pyomelanin overproduction.
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Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana.
Predictions of drug-drug interactions resulting from time-dependent inhibition (TDI) of CYP3A4 have consistently overestimated or mispredicted (ie, false positives) the interaction that is observed in vivo. Recent findings demonstrated that the presence of the allosteric modulator progesterone (PGS) in the in vitro assay could alter the in vitro kinetics of CYP3A4 TDI with inhibitors that interact with the heme moiety, such as metabolic-intermediate complex forming inhibitors. The impact of the presence of 100 μM PGS on the TDI of molecules in the class of macrolides typically associated with metabolic-intermediate complex formation was investigated.
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Department of Biological Sciences, Midnapore City College, Midnapore, West Bengal. Electronic address:
Aeromonas hydrophila is a major aquatic habitat pathogen responsible for huge economic losses in the aquaculture and food industries. In this study, a lytic bacteriophage AHPMCC11 was isolated by using A. hydrophila MTCC 1739.
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School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China. Electronic address:
Actinomycetes are an important source of secondary metabolites such as antibiotics and other active natural products. Many well-known antibiotics, such as streptomycin, oxytetracycline, and tetracycline, are produced by actinomycetes. Different types of antibiotics have distinct mechanisms of action against microorganisms: inhibit protein synthesis, inhibit nucleic acid synthesis, or inhibit cell wall synthesis.
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Department of Biotechnology and Food Microbiology, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, 37 Chełmońskiego St., Wrocław 51-630, Poland. Electronic address:
Avian pathogenic Escherichia coli (APEC) is the main causative agent of colibacillosis, causing poultry respiratory infections, mortality and economic loss. APEC poses a serious threat to public health and food safety due to its multi-drug resistance and capacity to form biofilms. Bacteriophages (phages) have emerged as an alternative to antibiotics.
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