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Antibacterial and therapeutic effects of Vancomycin-resistant Staphylococcus aureus bacteriocin (VRSAcin) in treatment of VRSA skin infection in mice
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Abstract<p>Vancomycin Staphylococcus aureus (VRSA) is a strain belonging to S. aureus that is considered the main cause of bacterial skin and soft tissue infections. It has acquired resistance to vancomycin and represents a therapeutic challenge. The current study aimed to compare the possible therapeutic effects of VRSA bacteriocin (VRSAcin) on the treatment of skin infection in mice compared with an antibiotic (linezolid). The results showed that from fifty swabs obtained from human skin wounds, only 30 samples were identified as Staphylococcus spp., and 20 samples of them were identified as VRSA strains. One isolate was selected for VRSAcin extraction depending on its antibiotic resistance using an antibiotic susceptibility test. The typical conditions for the production of VRSAcin include pH 7 and a temperature of 37°C for 48 hours. In mice, VRSA-contaminated wounds revealed severe tissue distraction and inflammation that extended to the hypodermis, while VRSA-treated skin showed mild changes and localized lesions to the epidermis and upper dermis. Linezolid-ointment-treated skin shows moderate to severe changes. In conclusion, VRSA strain infections in human burned skin were found to be more common than expected. In vivo studies in mice indicated that wounded skin infected with VRSA can be treated with VRSAcin as an antibacterial agent that promotes healing processes with obvious superiority to linezolid ointment.</p>
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Publication Date
Thu Apr 01 2021
Journal Name
Biochemical & Cellular Archives
Impacts of Starvation Stress on Biofilm Formation and expression of Virulence Genes in Mono-and Mixed-species cultures of Pseudomonas Aeruginosa and Staphylococcus aureus
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Staphylococcus aureus and Pseudomonas aeruginosa are the major globally distributed pathogens, which causes chronic and recalcitrant infections due to their capacity to produce biofilms in large part. Biofilm production represents a survival strategy in these species, allowing them to endure environmental stress by altering their gene expression to match their own survival needs. In this study, we co-cultured different clinical isolates of S. aureus and P. aeruginosa as mono- and mixed-species biofilms in a full-strength Brain Heart Infusion Broth (BHI) and in a 1000-fold diluted Brain Heart Infusion Broth (BHI/1000) using Microtiter plate assay and determination of colony-forming units. Furthermore, the effect of starvation stress on the e

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Publication Date
Mon Apr 23 2018
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Antimicrobial Effect of Lactobacillus as a Probiotic Isolated from Yoghurt Products Against Staphylococcus aureus and Escherichia.coli
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Probiotic bacteria using in commercially produced foods are at most members of the genera Lactobacillus and Bifidobacterium. This research was aimed to study the antimicrobial effect of lactobacillus bacteria as probiotic against some pathogenic bacteria, strains of lactobacillus bacteria were isolated from two types of yoghurt in Baquba city, Iraq . Total of 60 yoghurt samples from 2 origins (30 locally and 30 commercial produced yoghurt) were used to isolate probiotic bacteria which were identified phenotypically and biochemically. 30 (100%) of locally produced yoghurt samples include with probiotic bacteria while 12 (40%) commercially types of yoghurt samples were contained with probiotic, the method of modi

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Publication Date
Thu Feb 07 2019
Journal Name
Iraqi Journal Of Laser
Treatment of Skin Scar Using CO2 Laser with or Without Corticosteroid
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CO2 Laser (10600nm) is the recent method in the management of challenging skin scar resulting from trauma, burn and surgical wound. The aim of this study was to evaluate the efficacy & safety of fractional CO2 laser (10600nm) in treatment of skin scar. Materials and Methods:Twenty patients with different types of scars treated with fractional CO2 (10600nm) laser, (10 patients) were given additional intralesional Triamcinolone. Results: All of the twenty patients included in this study showed some sort of improvements in scar texture, height and pliability and all of the ten patients who received intralesional Triamcinolone after laser show complete satisfaction. Conclusion:Fractional CO2 (10600nm) laser can be used as alternative, ef

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Publication Date
Wed Jan 01 2020
Journal Name
Journal Of Biotech Research
Bacteriocin Production by Staphylococcus Epidermidis the Normal Flora of Outer Ear: A Potential Probiotic Against Outer Ear Infections
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Scopus
Publication Date
Wed Feb 08 2023
Journal Name
Iraqi Journal Of Science
Effect of Some Materials on Productivity and Activity of -Hemolysin which Produced by Methicillin Ressistant Staphylococcus Aureus
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In this study 77 human isolates of Staphylococcus aureus were obtain from different clinical sources. The results showed that the number of isolates producing α-hemolysin was 32 isolates (41.55%) , while non- hemolysin producing was 45 isolates (58.45%) .The minimum inhibitory concentration (MIC) of methicillin which were 32 micrograms \ ml. The effect of CD-Cholesterol ,Cholesterol ,Cyclodextran(CD) ,Methicillin and Phosphate Buffer Saline(PBS) on α- hemolysin activity was study and the hemolytic Titer was:8 ، 32.768 ,65.536 ,
140.737.488.355.32 , 4.961408E + 25 respectively, while the effect of the same effect with Titer 67.108.864 and low Titer with PBS 3.96140812E + 25. The α – hemolysin toxin was partialy purified by ammoni

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Publication Date
Sat Sep 23 2017
Journal Name
Ibn Al-haitham Journal For Pure And Applied Sciences
Toxicological and Immunological Effects o·f th.e Insecticide Diazinon in Male Albino Mice
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This st4dy  has been ccil'nd·ucted· to Â·shed a1ight 00: the

tox:icologital ®d irmm.J,nological effects.of the insectiCide Diaziuon

on male albino mice.

In order to determine the dose   whiCh should be ut\lized in he

chrqn:ic exposure  study, the LD:so valubas established  which rea.ched

58 mg l kg  of b0dy weight . Various parameters were· utHizea in

  • evaluatitig'the effects of tb:e.·ins.ecticide in fo.ut Weeks ami ig}1t weeks

..p,ost  ora.l - e.xposure l'lsing the concentrations 5, lb-  l.5 · mg I kg  body

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Publication Date
Sat Jan 30 2021
Journal Name
Iraqi Journal Of Science
Molecular Detection of Enterotoxin Genes of Multiresistant Staphylococcus aureus Isolates from Different Sources of Food
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Foodborne diseases are a major risk for human health. Millions of people become sick as a result of eating contaminated food with microorganisms that cause diseases. S.  aureus is considered as one of the most important pathogenic bacteria, having the ability to  activate certain genes that encode for heat stable enterotoxins and cause Staphylococcal food poisoning. Thus, this study aimed to determine the prevalence of multi resistant Staphylococcus aureus that produce enterotoxins in different sources of food . Forty nine isolates were identified as S.aureus, according to morphological and biochemical tests. They were isolated from 387 different food samples from several randomly covered restaurants

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Publication Date
Sun Jan 01 2012
Journal Name
Indian Journal Of Dermatology
Lactic acid as a new therapeutic peeling agent in the treatment of lifa disease (frictional dermal melanosis)
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Publication Date
Mon Mar 02 2015
Journal Name
Journal Of Baghdad College Of Dentistry
Antibacterial Effects of Green Tea Extracts on Aggregatibacter Actinomycetemcomitans: In-Vitro Study
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Publication Date
Thu Oct 01 2015
Journal Name
Journal Of Dental And Medical Sciences
Antibacterial effects of green tea extracts on Prophyromonas Gingivalis (In-Vitro study)
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