scholarly journals Comparative Analysis ofViperidaeVenoms Antibacterial Profile: a Short Communication for Proteomics

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Bruno L. Ferreira ◽  
Dilvani O. Santos ◽  
André Luis dos Santos ◽  
Carlos R. Rodrigues ◽  
Cícero C. de Freitas ◽  
...  
Keyword(s):  
Staphylococcus Epidermidis ◽  
Bacterial Infections ◽  
Multidrug Resistant ◽  
Drug Resistant ◽  
Future Design ◽  
Important Health ◽  
New Antibiotics ◽  
Resistant Strains ◽  
Lachesis Muta ◽  
Pharmacological Potential

Bacterial infections involving multidrug-resistant strains are one of the ten leading causes of death and an important health problem in need for new antibacterial sources and agents. Herein, we tested and compared four snake venoms (Agkistrodon rhodostoma, Bothrops jararaca, B. atrox and Lachesis muta) against 10 Gram-positive and Gram-negative drug-resistant clinical bacteria strains to identify them as new sources of potential antibacterial molecules. Our data revealed that, as efficient as some antibiotics currently on the market (minimal inhibitory concentration (MIC) = 1–32 μg mL−1),A. rhodostomaandB. atroxvenoms were active againstStaphylococcus epidermidisandEnterococcus faecalis(MIC = 4.5 μg mL−1), whileB. jararacainhibitedS. aureusgrowth (MIC = 13 μg ml−1). As genomic and proteomic technologies are improving and developing rapidly, our results suggested thatA. rhodostoma, B. atroxandB. jararacavenoms and glands are feasible sources for searching antimicrobial prototypes for future design new antibiotics against drug-resistant clinical bacteria. They also point to an additional perspective to fully identify the pharmacological potential of these venoms by using different techniques.

scholarly journals Fosfomycin

2016 ◽  
Vol 29 (2) ◽  
pp. 321-347 ◽  
Author(s):  
Matthew E. Falagas ◽  
Evridiki K. Vouloumanou ◽  
George Samonis ◽  
Konstantinos Z. Vardakas
Keyword(s):  
Bacterial Infections ◽  
Clinical Effectiveness ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Antibiotic Resistant ◽  
Development Of Resistance ◽  
Extensively Drug Resistant ◽  
New Antibiotics

SUMMARYThe treatment of bacterial infections suffers from two major problems: spread of multidrug-resistant (MDR) or extensively drug-resistant (XDR) pathogens and lack of development of new antibiotics active against such MDR and XDR bacteria. As a result, physicians have turned to older antibiotics, such as polymyxins, tetracyclines, and aminoglycosides. Lately, due to development of resistance to these agents, fosfomycin has gained attention, as it has remained active against both Gram-positive and Gram-negative MDR and XDR bacteria. New data of higher quality have become available, and several issues were clarified further. In this review, we summarize the available fosfomycin data regarding pharmacokinetic and pharmacodynamic properties, thein vitroactivity against susceptible and antibiotic-resistant bacteria, mechanisms of resistance and development of resistance during treatment, synergy and antagonism with other antibiotics, clinical effectiveness, and adverse events. Issues that need to be studied further are also discussed.

scholarly journals Antimicrobial Contribution of Chitosan Surface-Modified Nanoliposomes Combined with Colistin against Sensitive and Colistin-Resistant Clinical Pseudomonas aeruginosa

Pharmaceutics ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 41
Author(s):  
Valentina Laverde-Rojas ◽  
Yamil Liscano ◽  
Sandra Patricia Rivera-Sánchez ◽  
Ivan Darío Ocampo-Ibáñez ◽  
Yeiston Betancourt ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Physicochemical Parameters ◽  
Bacterial Infections ◽  
Public Health Problem ◽  
Md Simulations ◽  
Multidrug Resistant ◽  
Drug Resistant ◽  
Resistant Strains ◽  
Surface Modified ◽  
Antibiotic Peptide

Colistin is a re-emergent antibiotic peptide used as a last resort in clinical practice to overcome multi-drug resistant (MDR) Gram-negative bacterial infections. Unfortunately, the dissemination of colistin-resistant strains has increased in recent years and is considered a public health problem worldwide. Strategies to reduce resistance to antibiotics such as nanotechnology have been applied successfully. In this work, colistin was characterized physicochemically by surface tension measurements. Subsequently, nanoliposomes coated with highly deacetylated chitosan were prepared with and without colistin. The nanoliposomes were characterized using dynamic light scattering and zeta potential measurements. Both physicochemical parameters fluctuated relatively to the addition of colistin and/or polymer. The antimicrobial activity of formulations increased by four-fold against clinical isolates of susceptible Pseudomona aeruginosa but did not have antimicrobial activity against multidrug-resistant (MDR) bacteria. Interestingly, the free coated nanoliposomes exhibited the same antibacterial activity in both sensitive and MDR strains. Finally, the interaction of colistin with phospholipids was characterized using molecular dynamics (MD) simulations and determined that colistin is weakly associated with micelles constituted by zwitterionic phospholipids.

scholarly journals Broad Spectrum Antimicrobial Activity of Licochalcones A and E against MDR (Multidrug Resistant) Strains of Clinical Origin

2017 ◽  
Vol 12 (11) ◽  
pp. 1934578X1701201 ◽  
Author(s):  
Jung-Eun Kim ◽  
Goo Yoon ◽  
Jung-Hyun Shim ◽  
Seung-Sik Cho
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Bacterial Infections ◽  
Multidrug Resistant ◽  
Drug Resistant ◽  
Baseline Information ◽  
Resistant Strains ◽  
Glycyrrhiza Inflata ◽  
Drug Resistant Strains ◽  
Potential Use

The aim of this study was to evaluate the antibacterial activity of the licochalcones A (1) and E (2) against drug resistant strains of clinical origin. The results indicate that the licochalcones had a broad inhibitory activity against tested bacteria. Compared to vancomycin and teicoplanin, these compounds provided weaker activity against non-MDR Staphylococcus aureus and Enterococcus but broader activity against MRSA and VRE strains. The results provide promising baseline information for the potential use of 1 and 2 from Glycyrrhiza inflata in the treatment of drug resistant bacterial infections.

scholarly journals The Biology and Role of Interleukin-32 in Tuberculosis

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Wu Li ◽  
Wanyan Deng ◽  
Jianping Xie
Keyword(s):  
Multidrug Resistant ◽  
Drug Resistant ◽  
Host Molecule ◽  
Tuberculosis Control ◽  
Promising Alternative ◽  
Extensively Drug Resistant ◽  
Important Host ◽  
Resistant Strains ◽  
Drug Resistant Strains

Tuberculosis, caused by Mycobacterium tuberculosis, remains a leading cause of morbidity and mortality globally, with nearly 10.4 million new cases of incidence and over 1.7 million deaths annually. Drug-resistant M. tuberculosis strains, especially multidrug-resistant or extensively drug-resistant strains, have further intensified the problem associated with tuberculosis control. Host-directed therapy is a promising alternative for tuberculosis control. IL-32 is increasingly recognized as an important host molecule against tuberculosis. In this review, we highlight the proinflammatory properties of IL-32 and the mode of action of IL-32 in mycobacterial infections to inspire the development of novel immunity-based countermeasures and host-directed therapies against tuberculosis.

scholarly journals Protein–protein interactions in bacteria: a promising and challenging avenue towards the discovery of new antibiotics

2018 ◽  
Vol 14 ◽  
pp. 2881-2896 ◽  
Author(s):  
Laura Carro
Keyword(s):  
Protein Interactions ◽  
Bacterial Infections ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Protein Protein Interactions ◽  
Lead Discovery ◽  
Antibiotic Development ◽  
Cellular Processes ◽  
Ppi Networks ◽  
New Antibiotics

Antibiotics are potent pharmacological weapons against bacterial infections; however, the growing antibiotic resistance of microorganisms is compromising the efficacy of the currently available pharmacotherapies. Even though antimicrobial resistance is not a new problem, antibiotic development has failed to match the growth of resistant pathogens and hence, it is highly critical to discover new anti-infective drugs with novel mechanisms of action which will help reducing the burden of multidrug-resistant microorganisms. Protein–protein interactions (PPIs) are involved in a myriad of vital cellular processes and have become an attractive target to treat diseases. Therefore, targeting PPI networks in bacteria may offer a new and unconventional point of intervention to develop novel anti-infective drugs which can combat the ever-increasing rate of multidrug-resistant bacteria. This review describes the progress achieved towards the discovery of molecules that disrupt PPI systems in bacteria for which inhibitors have been identified and whose targets could represent an alternative lead discovery strategy to obtain new anti-infective molecules.

CURRENTLY USED ANTI-TUBERCULAR AGENTS, THEIR ANALOGUES AND RECENTLY DEVELOPED DRUGS

INDIAN DRUGS ◽  
2012 ◽  
Vol 49 (07) ◽  
pp. 5-19
Author(s):  
A Mohammad ◽  
Keyword(s):  
Antimicrobial Activity ◽  
Side Effects ◽  
Multidrug Resistant ◽  
Drug Resistant ◽  
Duration Of Treatment ◽  
Duration Of Therapy ◽  
Drug Molecules ◽  
Prolonged Duration ◽  
Resistant Strains ◽  
Reduced Toxicity

Tuberculosis (TB) is one of most prevailing diseases, responsible for the morbidity and mortality of a large number of populations worldwide. Traditionally, it has relied on a limited number of drugs such as isoniazid, rifampicin, ethambutol, streptomycin, ethionamide and pyrazinamide. However, many of these drugs have different disadvantages such as prolonged duration of treatment, host toxicity and ineffectiveness against resistant strains. This has motivated the search of newer drug molecules, capable of rapid mycobactericidal action with shortened duration of therapy, reduced toxicity and enhanced activity against multidrug resistant strains. These observations have been guiding for the currently used and newly developed anti-tubercular agents that possess potent antimicrobial activity and their side effects, activity against multi drug resistant Mycobacterium, and also in patients co-infected with HIV/AIDS.

scholarly journals Thinking Outside the Bug: Molecular Targets and Strategies to Overcome Antibiotic Resistance

2019 ◽  
Vol 20 (6) ◽  
pp. 1255 ◽  
Author(s):  
Ana Monserrat-Martinez ◽  
Yann Gambin ◽  
Emma Sierecki
Keyword(s):  
Antibiotic Resistance ◽  
Bacterial Infections ◽  
Rational Design ◽  
Disease Onset ◽  
Resistant Bacteria ◽  
Antibiotic Resistant ◽  
New Antibiotics ◽  
Resistant Strains ◽  
Vancomycin Resistant ◽  
Antibiotic Discovery

Since their discovery in the early 20th century, antibiotics have been used as the primary weapon against bacterial infections. Due to their prophylactic effect, they are also used as part of the cocktail of drugs given to treat complex diseases such as cancer or during surgery, in order to prevent infection. This has resulted in a decrease of mortality from infectious diseases and an increase in life expectancy in the last 100 years. However, as a consequence of administering antibiotics broadly to the population and sometimes misusing them, antibiotic-resistant bacteria have appeared. The emergence of resistant strains is a global health threat to humanity. Highly-resistant bacteria like Staphylococcus aureus (methicillin-resistant) or Enterococcus faecium (vancomycin-resistant) have led to complications in intensive care units, increasing medical costs and putting patient lives at risk. The appearance of these resistant strains together with the difficulty in finding new antimicrobials has alarmed the scientific community. Most of the strategies currently employed to develop new antibiotics point towards novel approaches for drug design based on prodrugs or rational design of new molecules. However, targeting crucial bacterial processes by these means will keep creating evolutionary pressure towards drug resistance. In this review, we discuss antibiotic resistance and new options for antibiotic discovery, focusing in particular on new alternatives aiming to disarm the bacteria or empower the host to avoid disease onset.

scholarly journals Multidrug-ResistantAcinetobacter baumannii: An Emerging Health Threat in Aseer Region, Kingdom of Saudi Arabia

2018 ◽  
Vol 2018 ◽  
pp. 1-4 ◽  
Author(s):  
Mohammed K. Almaghrabi ◽  
Martin R. P. Joseph ◽  
Mohammed M. Assiry ◽  
Mohamed E. Hamid
Keyword(s):  
Saudi Arabia ◽  
Health Problem ◽  
Antibiotic Susceptibility ◽  
Multidrug Resistant ◽  
High Rate ◽  
The South ◽  
Kingdom Of Saudi Arabia ◽  
Bench Tests ◽  
Important Health ◽  
Resistant Strains

Objective. The study aims to determine the prevalence of multidrug-resistantA. baumanniiin Aseer Region, Kingdom of Saudi Arabia.Methods. This study evaluated the antibiotic susceptibility of ninety-four (n = 94) clinical isolates ofA. baumannii. The isolates were collected from the south region of Saudi Arabia, and notably Aseer Region, during the period from 15 October 2014 to 15 January 2015. The isolates were tentatively identified asA. baumanniiby routine bench tests and were confirmed by using VITEK® 2 Compact. The latest instrument was used to identify antibiotic susceptibility of these isolates.Results. Antibiotic susceptibility in this study showed that 69% of these isolates were multidrug-resistant strains. Moreover, they were highly resistant to carbapenem drugs. Several strains of these isolates were found to be extremely resistant to test antibiotics and were only sensitive to one or two of them.Conclusion. High rate of multidrug-resistantA. baumanniibacteraemia has emerged in the south region of Saudi Arabia as an important health problem. Therefore, it is considered as a new threat in hospitals, which requires a tremendous effort to stop its escalation and spread.

scholarly journals Cockroaches as a Source of High Bacterial Pathogens with Multidrug Resistant Strains in Gondar Town, Ethiopia

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Feleke Moges ◽  
Setegn Eshetie ◽  
Mengistu Endris ◽  
Kahsay Huruy ◽  
Dagnachew Muluye ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Bacterial Species ◽  
Multidrug Resistant ◽  
Resistance Rate ◽  
Control Measures ◽  
Diffusion Method ◽  
Disk Diffusion Method ◽  
Gondar Town ◽  
Resistant Strains ◽  
And Control

Background. Cockroaches are source of bacterial infections and this study was aimed to assess bacterial isolates and their antimicrobial profiles from cockroaches in Gondar town, Ethiopia.Methods. A total of 60 cockroaches were collected from March 1 to May 30, 2014, in Gondar town. Bacterial species were isolated from external and internal parts of cockroaches. Disk diffusion method was used to determine antibiotic susceptibility patterns. Data were entered and analyzed by using SPSS version 20;Pvalues <0.005 were considered as statistically significant.Results. Of 181 identified bacteria species, 110 (60.8%) and 71 (39.2%) were identified from external and internal parts of cockroaches, respectively.Klebsiella pneumoniae32 (17.7%),Escherichia coli29 (16%), andCitrobacterspp. 27 (15%) were the predominant isolates. High resistance rate was observed to cotrimoxazole, 60 (33.1%), and least resistance rate was noted to ciprofloxacin, 2 (1.1%). Additionally, 116 (64.1%) of the isolates were MDR strains;Salmonellaspp. were the leading MDR isolates (100%) followed byEnterobacter(90.5%) andShigellaspp. (76.9%).Conclusion. Cockroaches are the potential source of bacteria pathogens with multidrug resistant strains and hence effective preventive and control measures are required to minimize cockroach related infections.

scholarly journals Antibiotics in Development for the Treatment of Resistant Bacterial Disease

2017 ◽  
Vol 53 (1) ◽  
pp. 38-40 ◽  
Author(s):  
Ryan Kidd ◽  
Scot Walker
Keyword(s):  
Bacterial Infections ◽  
Morbidity And Mortality ◽  
Bacterial Disease ◽  
Drug Resistant ◽  
New Antibiotics

Many bacterial infections can be treated with the use of antibiotics. These medications continue to reduce morbidity and mortality; unfortunately, their use has brought about drug-resistant pathogens that produce difficult-to-treat infections, which require more extreme treatments. New antibiotics are needed to combat this ever-evolving resistance pathogenesis.

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