scholarly journals Novel organophosphorus aminopyrimidines as unique structural DNA-targeting membrane active inhibitors towards drug-resistant methicillin-resistant Staphylococcus aureus

MedChemComm ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 1529-1537 ◽  
Author(s):  
Di Li ◽  
Rammohan R. Yadav Bheemanaboina ◽  
Narsaiah Battini ◽  
Vijai Kumar Reddy Tangadanchu ◽  
Xian-Fu Fang ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Molecular Modeling ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Antibacterial Mechanism ◽  
Drug Resistant ◽  
Methicillin Resistant ◽  
Dna Targeting

Molecular modeling of organophosphorus aminopyrimidine and the possible antibacterial mechanism.

scholarly journals Antibacterial activity of Taxodium ascendens Diterpenes against Methicillin-resistant Staphylococcus aureus

2014 ◽  
Vol 9 (8) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Courtney M. Starks ◽  
Vanessa L. Norman ◽  
Russell B. Williams ◽  
Matt G. Goering ◽  
Stephanie M. Rice ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Bacterial Infections ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Clinical Isolates ◽  
Drug Resistant ◽  
Methicillin Resistant

One new and seven known diterpenes were identified from an antibacterial chromatographic fraction of Taxodium ascendens. Of these, demethylcryptojaponol (2), 6-hydroxysalvinolone (3), hydroxyferruginol (4), and hinokiol (5) demonstrated potent activity against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA). These compounds represent a class of synthetically accessible compounds that could be further developed for treatment of drug-resistant bacterial infections.

scholarly journals Terpenes from Zingiber montanum and Their Screening against Multi-Drug Resistant and Methicillin Resistant Staphylococcus aureus

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 385 ◽  
Author(s):  
Holly Siddique ◽  
Barbara Pendry ◽  
M. Mukhlesur Rahman
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Secondary Metabolites ◽  
Mass Spectra ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Drug Resistant ◽  
Two Dimensional ◽  
Methicillin Resistant ◽  
One Dimensional ◽  
Nmr Data

Bioassay directed isolation of secondary metabolites from the rhizomes of Zingiber montanum (Fam. ‎Zingiberaceae) led to the isolation of mono-, sesqui-, and di-terpenes. The compounds were characterized as (E)-8(17),12-labdadiene-15,16-dial (1), zerumbol (2), zerumbone (3), buddledone A (4), furanodienone (5), germacrone (6), borneol (7), and camphor (8) by analysing one-dimensional (1D) (1H and 13C) and two-dimensional (2D) (COSY, HSQC, HMBC, and NOESY) NMR data and mass spectra. Among these terpenes, compounds 1 and 2 revealed potential antibacterial activity (minimum inhibitory concentrations (MIC) values 32–128 µg/mL; 0.145–0.291 mM)) against a series of clinical isolates of multi-drug resistant (MDR) and Methicillin resistant Staphylococcus aureus (MRSA).

Mammary Dysbiosis and Nipple Blebs Treated With Intravenous Daptomycin and Dalbavancin

2019 ◽  
Vol 36 (2) ◽  
pp. 365-368 ◽  
Author(s):  
Katrina B. Mitchell ◽  
Anne Eglash ◽  
Ethan T. Bamberger
Keyword(s):  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Clinical Presentation ◽  
Breast Surgery ◽  
Management Strategies ◽  
Left Breast ◽  
Drug Resistant ◽  
Intravenous Antibiotic ◽  
Methicillin Resistant ◽  
History Of

Introduction Mammary dysbiosis, also known as subacute mastitis, may be associated with nipple blebs. These overlapping diagnoses represent a challenging clinical scenario during lactation. Little research has been published on etiology, management strategies, and outcomes of these concurrent diagnoses. Main issue We document the treatment and outcome of a patient who presented with left-breast dysbiosis and nipple blebs and whose milk culture grew multi-drug-resistant, methicillin-resistant Staphylococcus aureus. She was treated safely and effectively with intravenous daptomycin and dalbavancin. This has not been described previously in the lactation literature. Management The 35-year-old lactating gravida 3, para 3 patient presented at 6 months postpartum to a breast surgery clinic with a 1-week history of worsening deep left-breast pain, blebs, and recurrent plugging. She was afebrile and she had no erythema or induration on her breast exam. A culture of her milk grew multi-drug-resistant, methicillin-resistant Staphylococcus aureus, and she was referred to infectious disease for assistance with intravenous antibiotic therapy. She continued to feed expressed milk throughout treatment and demonstrated complete resolution of symptoms 8 weeks later. Conclusions We report that in patients with a multi-drug-resistant, methicillin-resistant Staphylococcus aureus–positive human milk culture and a clinical presentation of mammary dysbiosis and nipple blebs, intravenous daptomycin and dalbavancin may be an effective treatment.

scholarly journals PSV-32 Influence of chlorate and chlorate plus molybdate on the growth of multi-drug resistant staphylococci

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 295-295
Author(s):  
Oscar Ruiz ◽  
Yamicela Castillo-Castillo ◽  
Robin Anderson ◽  
Michael E Hume ◽  
Claudio Arzola ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Nitrate Reductase ◽  
Growth Rates ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Specific Growth ◽  
Brain Heart Infusion ◽  
Inhibitory Effect ◽  
Drug Resistant ◽  
Methicillin Resistant ◽  
Specific Growth Rates

Abstract This study was conducted to determine the effects of chlorate, a metabolic precursor of the bactericide chlorite, when administered without or with molybdate, an essential component of a co-enzyme contributing to nitrate reductase conversion of chlorate to chlorite, against methicillin-resistant staphylococci, important mastitic-pathogens of livestock. Two methicillin-resistant Staphylococcus aureus (strains CP and 49521) were individually cultured for 12 h at 39o C in nitrate-supplemented (5 mM) ½-strength Brain Heart Infusion broth (10 mL/tube) treated without (control) or with 5 mM chlorate (CL) or 5 mM chlorate plus 1 mM molybdate (CLMO). Control and treated cultures were incubated anaerobically in triplicate and growth was measured via absorbance at 600 nm. An analysis of variance revealed an inhibitory effect of treatments (P < 0.05) on maximum absorbances observed after the 12-h incubation, with maximum absorbances for CP (1.22, 0.10, and 0.46; SEM = 0.12) and 49521 (1.24, 0.22 and 0.06, SEM = 0.09) being higher in controls than in CL- and CLMO-treated cultures, respectively. Similarly, mean specific growth rates of S. aureus CP and 49521 were inhibited (P < 0.05) by both treatments during the first 6 h of growth, with rates being most rapid in control cultures, intermediate in CLMO-treated cultures and slowest in CL-treated cultures (0.68, 0.27 and 0.03 h-1, SEM= 0.15; and 0.92, 0.47 and 0.09 h-1, SEM = 0.08; for CP and 40521, respectively). Growth rates did not differ (P > 0.05) between controls or treatments during the last 6 h of incubation, averaging 0.74 and 0.75 h-1 for both CP and 49521 (SEM = 0.20 and 0.22, respectively). These results confirm that chlorate treatment inhibits methicillin-resistant Staphylococcus aureus strains CP and 49521 although moderate adaption by these strains began to occur after 6 h incubation which, contrary to expectation, was not overcome by co-treatment with molybdate.

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