Abstract
Background: Resistant bacteria develop a high level of resistance to multiple drugs, limiting treatment options and increasing morbidity and mortality. This work was planned to evaluate the antibacterial potential of the methanol extract from the whole plant of Kalanchoe crenata (KCW) against multidrug-resistant (MDR) Gram-negative bacteria.
Methods: The minimal inhibitory concentrations (MIC) and the minimal bactericidal concentrations (MBC) of KCW alone, in the presence of an e...
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Month: August 2023
Botanical from the bark of Zizyphus jujuba Mill. (Rhamnaceae) had weak anti-Klebsiella activity, but strongly potentiated the effects of antibiotics against multidrug-resistant phenotypes
Abstract
Background: Klebsiella pneumoniae is medically the most important species of this genus. Klebsiella oxytoca also cause infections in human but to a much lesser degree than K. pneumoniae. In this work, the antibacterial potential of the methanol extract from the bark of Zizyphus jujuba (ZJB) was evaluated against the multidrug-resistant (MDR) clinical isolates of Klebsiella pneumoniae and Klebsiella oxytoca overexpressing AcrAB-TolC efflux pumps.
Methods: The broth microdilution m...
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Botanicals from Aframomum letestuanum Gagnep. (Zingiberaceae) can overcome the multidrug resistance of Klebsiella species overexpressing AcrAB-TolC efflux pumps
Abstract
Background: Bacteria belonging to the genus Klebsiella have developed resistance mechanisms to clinically used antibiotics, leading to their loss of efficacy. In the present study, the in vitro antibacterial activity of methanol extracts from Aframomum letestuanum, as well as their modes of action against a panel of 14 bacterial species belonging to the genus Klebsiella including multidrug-resistant (MDR) phenotypes overexpressing efflux pumps were evaluated.
Methods: The broth m...
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Antibacterial potential and modes of action of methanol extracts of flowers and leaves of Vernonia glabra (Steetz) Vatke (Asteraceae) against multidrug-resistant Gram-negative bacteria overexpressing efflux pumps
Abstract
Background: Bacterial infections caused by multidrug-resistant (MDR) Gram-negative bacteria remain a public health problem and have contributed to a reduction in the range of antibiotics available for antibiotic therapy. The search for new antibacterial substances is becoming increasingly important, and plants represent an important reservoir of therapeutic molecules. In the present study, the antibacterial activity, and modes of action of Vernonia glabra against Gram-negative and m...
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Antibacterial potential and modes of action of the methanol extracts of Elephantopus mollis Kunth (Asteraceae) against multidrug-resistant Gram-negative bacteria overexpressing efflux pumps
Abstract
Background: Bacterial drug resistance still constitutes a major clinical issue. In the present study, the in vitro antibacterial potential, and modes of action of Elephantopus mollis were investigated.
Methods: The antibacterial activity of methanol extracts of the various parts of E. mollis, their association with an efflux pump inhibitor, phenylalanine-arginine β-naphthylamide (PAβN), and the potentiating effect of several standard antibiotics were determined using the broth mi...
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