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Role of Divalent Ions in Membrane Models of Polymyxin-Sensitive and Resistant Gram-Negative Bacteria.
J Chem Inf Model
January 2025
Central European Institute of Technology, Masaryk University, Brno60200, Czech Republic.
Polymyxins, critical last-resort antibiotics, impact the distribution of membrane-bound divalent cations in the outer membrane of Gram-negative bacteria. We employed atomistic molecular dynamics simulations to model the effect of displacing these ions. Two polymyxin-sensitive and two polymyxin-resistant models of the outer membrane of were investigated.
View Article and Find Full Text PDFFrequency and Patterns of Multidrug-Resistant Organisms among Ventilated Patients During the Coronavirus Disease-19 Pandemic.
J Coll Physicians Surg Pak
January 2025
Department of Pathology, National Institute of Cardiovascular Diseases, Karachi, Pakistan.
Objective: To determine the frequency of multidrug-resistant (MDR) bacterial isolates in respiratory specimens obtained from ventilated patients admitted to critical care units at the National Institute of Cardiovascular Diseases (NICVD), along with COVID-19-positive cases.
Study Design: An observational study. Place and Duration of the Study: National Institute of Cardiovascular Diseases, between November 2021 and March 2022.
Chicago Sky Blue Stain, Calcofluor White Stain, and Potassium Hydroxide Mount for Diagnosis of Dermatomycosis.
J Coll Physicians Surg Pak
January 2025
Department of Microbiology, Armed Forces Institute of Pathology / National University of Medical Sciences, Rawalpindi, Pakistan.
Objective: To evaluate Chicago Sky Blue (CSB) stain, Calcofluor white (CW) stain, and Potassium Hydroxide (KOH) mount for rapid diagnosis of dermatomycosis, using fungal culture as the gold standard.
Study Design: Cross-sectional analytical study. Place and Duration of the Study: This study was conducted in the Department of Microbiology, Armed Forces Institute of Pathology / National University of Medical Sciences, Rawalpindi, Pakistan, from July 2023 to February 2024.
Comparative In vitro antibacterial activity of nemonoxacin and other fluoroquinolones in correlation with resistant mechanisms in contemporary methicillin-resistant Staphylococcus aureus blood isolates in Taiwan.
Ann Clin Microbiol Antimicrob
January 2025
Division of Infectious Diseases, Department of Internal Medicine, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, 100, Taiwan.
Background: Nemonoxacin is a new quinolone with an antibacterial efficacy against methicillin-resistant Staphylococcus aureus (MRSA). Certain sequence types (STs) have been emerging in Taiwan, including fluoroquinolone-resistant ST8/USA300. It's an urgent need to determine nemonoxacin susceptibility against ST8/USA300 and other emerging lineages, if any.
View Article and Find Full Text PDFEvaluation of extracts from used Xpert MTB/RIF cartridges for detection of resistance to second-line anti-tuberculosis drugs in patients with multidrug-resistant tuberculosis in Ethiopia.
BMC Microbiol
January 2025
Mycobacteriology Research Center, Institute of Health, Jimma University, Jimma, Oromia, Ethiopia.
Background: Early and accurate diagnosis of drug resistance, including resistance to second-line anti-tuberculosis (TB) drugs, is crucial for the effective control and management of pre-extensively drug-resistant TB (pre-XDR-TB) and extensively drug-resistant TB (XDR-TB). The Xpert MTB/XDR assay is the WHO recommended method for detecting resistance to isoniazid and second-line anti-TB drugs when rifampicin resistance is detected. Currently, the Xpert MTB/XDR assay is not yet implemented in Ethiopia, thus the MTBDRsl assay continues to be used.
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