Antibacterial Activity of Halophilic Bacteria Against Drug-Resistant Microbes Associated with Diabetic Foot Infections

2020 ◽  
Vol 77 (11) ◽  
pp. 3711-3723
Author(s):  
Santhaseelan Henciya ◽  
Thasu Dinakaran Vengateshwaran ◽  
Murugaiah Santhosh Gokul ◽  
Hans-Uwe Dahms ◽  
Rathinam Arthur James
Keyword(s):  
Antibacterial Activity ◽  
Diabetic Foot ◽  
Halophilic Bacteria ◽  
Drug Resistant ◽  
Diabetic Foot Infections

scholarly journals Studies on potential of Withania somnifera root extract against diabetic foot infection pathogens

2017 ◽  
Vol 7 (5) ◽  
pp. 11
Author(s):  
Abdul Kapur Mohamed Mydeen ◽  
Ahmed John Syed Basha
Keyword(s):  
Antibacterial Activity ◽  
Diabetic Foot ◽  
Chemical Constituents ◽  
Phytochemical Analysis ◽  
Root Extract ◽  
Active Fraction ◽  
Antibacterial Study ◽  
Diabetic Foot Infections ◽  
High Degree

Withaniasomnifera phytochemical analysis of root extract showed the presence of alkaloids, flavonoids, tannins saponins, carbohydrates, quinines and phenol compounds. Studies on the prevalence of diabetic foot infections showed a total of 88 isolates belongs to seven different genera. The standard antibacterial study reveals that E.coli and S.aureus were only isolated pathogens showed the high degree of resistant pattern against all tested antibiotics.  S.aureus showed 100 percent resistant to penicillin, ampicillin and amoxicillin. Out of 40 S.aureus isolates, 23 were found to be methicillin resistant and 12 were vancomycin resistant. Similarly out of 22 E.coli, 18 were resistant to penicillin; ampicillin and nine isolates were resistant to amoxicillin. The antibacterial activity of W.somnifera root extract showed potent antibacterial activity at 5mg/mL against E.coli and S.aureus. Bio assay analysis of extracted compounds reveals that the Rf value of the active fraction is 0.38. Gas Chromatography Mass Spectrum of active fraction shows the presence of 7 different chemical constituents concludes further purification of active compound is necessary. The haemolytic study confirms that the extract is safe to use since there is no haemolysis of human RBCs. Further analysis of purification and characterization of an active fraction is required for structural elucidation.

scholarly journals Correlation between superficial and intra-operative specimens in diabetic foot infections: results of a cross-sectional Tunisian study

2019 ◽  
Vol 19 (3) ◽  
pp. 2505-2514 ◽  
Author(s):  
Foued Bellazreg ◽  
Ahmed Guigua ◽  
Asma Ferjani ◽  
Zouhour Hattab ◽  
Jalel Boukadida ◽  
...  
Keyword(s):  
Antibiotic Therapy ◽  
Diabetic Foot ◽  
Susceptibility Testing ◽  
Cross Sectional Study ◽  
Drug Resistant ◽  
Sectional Study ◽  
Cross Sectional ◽  
Diabetic Foot Infections ◽  
And Staphylococcus Aureus ◽  
Extremity Amputation

Objective: To determine the correlation between superficial, and intra-operative specimens in diabetic foot infections (DFIs).Methods: We conducted a cross-sectional study in patients with DFIs hospitalized in a Tunisian teaching hospital. Superficial specimens were collected for all patients, and intra-operative specimens were collected in operated patients. The specimens were processed using standard microbiology techniques. Antimicrobial susceptibility testing was carried out according to the protocol established by the European Committee on Anti-microbial Susceptibility Testing. Intra-operative and superficial specimens were considered correlated if they isolated the same microorganism(s), or if they were both negative.Results: One hundred twelve patients, 81 males and 31 females, mean age 56 years, were included. Superficial samples were positive in 77% of cases, and isolated 126 microorganisms. Among the positive samples, 71% were monomicrobial. The most frequently isolated microorganisms were Enterobacteriaceae (53%), followed by streptococci (21%) and Staphylococcus aureus (17%). Nine microorganisms (7%) were multi-drug resistant. Intra-operative samples were positive in 93% of cases. Superficial specimens were correlated to intra-operative specimens in 67% of cases. Initial antibiotic therapy was appropriate in 70% of cases. The lower-extremity amputation and the mortality rates were 41% and 1%, respectively.Conclusion: In our study, DFIs were most frequently caused by Enterobacteriaceae and superficial specimens were correlated to intra-operative specimens in only two thirds of cases. Clinicians should emphasize on the systematic practice of intraoperative specimens in all patients with DFIs treated surgically, while well-performed superficial specimens could be useful for prescribing appropriate antibiotic therapy in other patients.Keywords: Diabetic foot infections, superficial specimens, intra-operative specimens.

scholarly journals Spectral and Antibiotic Susceptibility of Pathogens Isolated from Saudi Patients with Diabetic Foot Infections

2021 ◽  
Vol 12 (1) ◽  
pp. 16-20
Author(s):  
Samiah Hamad S Al-Mijalli
Keyword(s):  
Staphylococcus Aureus ◽  
Diabetic Foot ◽  
Antibiotic Susceptibility ◽  
Empirical Therapy ◽  
Multidrug Resistant ◽  
Foot Ulcers ◽  
Sensitivity Testing ◽  
Cross Sectional ◽  
Diabetic Foot Infections ◽  
Microbiological Methods

Diabetic foot infections (DFIs) are a significant health issue and a common complication among patients with diabetes. To develop antibiotic therapy for these high-risk patients, the current study evaluates the scope of DFIs and identifies the causing microbes. It also measures spectrum and antibiotic susceptibility of the pathogens isolated from adults with DFIs in Saudi Arabia. To achieve the study objectives, a cross-sectional study was implemented and the baseline characteristics for 44 patients with DFIs were defined. Optimal aerobic and anaerobic microbiological techniques were utilized to culture specimens isolated from infected foot ulcers. The standard microbiological methods were employed to identify the bacterial isolates and antibiotic susceptibility testing was conducted following the procedures of the Clinical and Laboratory Standards Institute (CLSI). Results showed that 12 microorganisms were isolated from the participants’ diabetic foot ulcers. Staphylococcus Aureus was ranked first because it appeared in 29 (65.9%) cases. Streptococcus Agalactiae was ranked second and multi-microbial infections were also found. Most of the organisms were susceptible to Vancomycin, Ciprofloxacin, and Cefalexin, but they were resistant to Methicillin, Gentamicin, and Ampicillin antibiotics. Staphylococcus Aureus was most sensitive to Ciprofloxacin, while it was resistant to Methicillin. About 10% of the isolates were multidrug-resistant. The study concludes that while Vancomycin should be used empirically for Gram-positive isolates, Ciprofloxacin can be taken into consideration for most of the Gram-negatives aerobes. Based on including various microorganisms and the advent of multidrug-resistant strains, proper culture and sensitivity testing are necessary prior to the empirical therapy.

scholarly journals New Antimicrobials Based on the Adarotene Scaffold with Activity against Multi-Drug Resistant Staphylococcus aureus and Vancomycin-Resistant Enterococcus

Antibiotics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 126
Author(s):  
Salvatore Princiotto ◽  
Stefania Mazzini ◽  
Loana Musso ◽  
Fabio Arena ◽  
Sabrina Dallavalle ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Anticancer Activity ◽  
Bactericidal Effect ◽  
Biological Assessment ◽  
Drug Resistant ◽  
Vancomycin Resistant Enterococcus ◽  
Vancomycin Resistant ◽  
Global Increase ◽  
Common Infections

The global increase in infections by multi-drug resistant (MDR) pathogens is severely impacting our ability to successfully treat common infections. Herein, we report the antibacterial activity against S. aureus and E. faecalis (including some MDR strains) of a panel of adarotene-related synthetic retinoids. In many cases, these compounds showed, together with favorable MICs, a detectable bactericidal effect. We found that the pattern of substitution on adarotene could be modulated to obtain selectivity for antibacterial over the known anticancer activity of these compounds. NMR experiments allowed us to define the interaction between adarotene and a model of microorganism membrane. Biological assessment confirmed that the scaffold of adarotene is promising for further developments of non-toxic antimicrobials active on MDR strains.

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