scholarly journals Antibiotic resistance in Acinetobacter baumannii as agent of surgery infection and approaches to its overcoming by means of deca-methoxinum antiseptic

2019 ◽  
Vol 1 (2) ◽  
pp. 18-22
Author(s):  
O A Nazarchuk ◽  
V I Nahaichuk
Keyword(s):  
Antibiotic Resistance ◽  
Antibiotic Sensitivity ◽  
Antibiotic Resistant ◽  
Clinical Strains ◽  
Minimal Inhibitory Concentrations ◽  
Hospital Acquired Infections ◽  
Causative Agents ◽  
Resistant Strains ◽  
Burn Disease ◽  
Hospital Acquired

Introduction. Non-fermenting Gram-negative bacilli are known as one of the most frequent causative agents of hospital-acquired infections. Acinetobacter baumannii, as causative agent of infection complications of different localization, has obtained recently high resistance to anti-biotics and has belonged to ESKAPE group of pathogens. Antimicrobials, recommended for the prophylaxis and therapy of hospital-acquired infections, have been failing in their effectiveness and lead to selection of antibiotic resistant strains of A. baumannii. The aim of this research was to substantiate the way of overcoming of resistance in clinical strains of A. baumannii, by means of synergic antimicrobial activity of antibiotics and antiseptic decamethoxinum®. Material and methods. The research was carried out on 190 clinical strains of A. baumannii, isolated from patients with burn disease during the period 2011–2015. The sensitivity of clinical strains of A. baumannii was determined to such antibiotics as ampicillin/sulbactam, cefoperazone, cefoperazone/sulbactam, meropenem, imipenem, amikacin, ciprofloxacin, gatifloxacin and antiseptic decamethoxinum® (DCM; Registration certificate No UA/14444/01/01 since 24.06.2015. Order of the Ministry of Health of Ukraine No 373). The sensitivity of A. baumannii to antibiotics and DCM was determined by means of disk diffusion test and serial dilution (Order of the Ministry of Health of Ukraine No167 since 05.04.2007; EUCAST expert rules).The study of the influence of antiseptic DCM on the sensitivity of acinetobacteria to antibiotics was studied on 35 clinical strains of A. baumannii, drafted from the general number of isolates enrolled in the research. For this, the sensitivity of A. baumannii to antibiotics in the presence of sub-minimal inhibitory concentrations (subMIC) of DCM was identified. The received experimental data were analyzed by “Statistica 6.0”. Results and discussion. The changes of antibiotic sensitivity profile of A. baumannii for five years were shown. It was found that the sensitivity of A. baumannii to majority of antibiotics, selected for study, decreased significantly. But the only ampicillin/sulbactam was found to have vice versa tendency. We found the rising quantity of antibiotic resistant strains of A. baumannii. At the same time, high resistance of acinetobacteria to fluoroquinolones (ciprofloxacin– 96,1%; gatifloxacin– 95,8%) was found in 2015. The in vitro research of combined activity of DCM antiseptic remedy and early mentioned antibiotics against clinical strains of A. baumannii demonstrated the reveal antibiotic effectiveness. As follows, minimal inhibitory concentrations of antibiotics decreased in 1.5–4 times in the mediums which contained subMIC of DCM. Especially this tendency was found in resistant clinical strains. Conclusion. Under selective influence of antibiotics protected by β-lactamase inhibitors, carbapenems, fluoroquinolones aminoglycosides increase the antibiotic resistance in A. baumannii, causative agents of infectious complications in patients with burn disease. The antiseptic remedy decamethoxinum® helps to improve antibiotic sensitivity in resistant A. baumannii.

Antibiotic resistance: a modern view of the problem by the example of a multi-profile hospital

2021 ◽  
pp. 19-25
Author(s):  
L. Yu. Kulagina ◽  
I. R. Valiullina ◽  
E. R. Kadyseva ◽  
M. L. Maksimov
Keyword(s):  
Mass Spectrometry ◽  
Antibiotic Resistance ◽  
Antibiotic Sensitivity ◽  
Hospital Infections ◽  
Strategic Decisions ◽  
Hospital Acquired Infections ◽  
Empirical Antibacterial Therapy ◽  
Inflammatory Processes ◽  
Hospital Acquired ◽  
Inpatient Department

Relevance. Conducting microbiological monitoring allows controlling hospital-acquired infections and making timely strategic decisions for epidemiologists and clinical pharmacologists. Objective of the work is to determine the tendency of prevailing problem microflora and to develop a strategy of empirical antibacterial therapy for severe nosocomial infections and inflammatory processes. Materials and methods. The article analyzes the main groups of pathogens of hospital infections in dynamics for the first quarter of 2018, 2019 and 2020. The relation of positive cultures to the total number of investigated samples was taken for the analysis. Antibiotic sensitivity was isolated, identified and determined using conventional mass spectrometry methods. The results. The stable sowing rate of Acinetobacter baumannii and Klebsiella pneumoniae in the intensive care and surgical departments was noted for the analyzed periods. To solve the issue of antibiotic resistance in the inpatient department, a strategy to contain it has been developed.

scholarly journals Frequency and antibiotic resistance of Ureaplasma urealyticum and Mycoplasma hominis in genital samples of sexually active individuals

2011 ◽  
Vol 152 (42) ◽  
pp. 1698-1702 ◽  
Author(s):  
Balázs Farkas ◽  
Eszter Ostorházi ◽  
Katinka Pónyai ◽  
Béla Tóth ◽  
Elmardi Adlan ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Sexually Transmitted Diseases ◽  
Ureaplasma Urealyticum ◽  
Antibiotic Sensitivity ◽  
Mycoplasma Hominis ◽  
High Rate ◽  
Sexually Active ◽  
Sexually Transmitted ◽  
Causative Agents ◽  
Resistant Strains

Ureaplasma urealyticum and Mycoplasma hominis have important role among the causative agents of sexually transmitted diseases. Aim: The aim of the study was to determine the frequency and antibiotic resistance of Ureaplasma urealyticum and Mycoplasma hominis in genital samples obtained from patients examined in the Sexually Transmitted Diseases Centre of the Department of Dermatology, Venerology and Dermatooncology, Semmelweis University, Budapest between May 1, 2008 and July 31, 2010. Patients and methods: Samples were taken from the urethra in men and from the cervix and urethra in women by universal swab (Biolab®) into Urea-Myco DUO kit (Bio-Rad®) and were incubated for 48 hours at 37 C°. Antibiotic sensitivity of positive samples was determined in U9 bouillon using SIR Mycoplasma kit (Bio-Rad®). Results: Samples for 4154 patients aged 16-60 years were examined. In 247/4154 samples (6%) U. urealyticum and in 26/4154 samples (0.63%) M. hominis was isolated from the genital tract. Most U. urealyticum and M. hominis strains (75% and 77%, respectively) were cultured from cervix, while the remaining 25%, and 23% from the male and female urethra, respectively. U. urealyticum and M. hominis were most commonly detected in patients aged between 21 and 40 years. The majority of U. urealyticum strains were sensitive to tetracycline (94%), doxycycline (95%), azithromycin (88%) and josamycin (90%), but were resistant to ofloxacin (21%), erythromycin (85%) and clindamycin (79%). Seventy-seven percent of the U. urealyticum strains were simultaneously resistant to erythromycin and clindamycin, suggesting that ex iuvantibus therapies may select cross-resistant strains to both antibiotics. The resistance of M. hominis to clindamycin, doxycycline, ofloxacin and tetracycline varied between 4% and 12 %. Conclusions: Because none of the strains was sensitive to all examined antibiotics, the antibiotic sensitivity of U. urealyticum and M. hominis strains should be determined. The high rate of ofloxacin, erythromycin and clindamycin resistance should be considered in the therapy of U. urealyticum infections in Hungary. This is the firstsuch a clinical microbiological study in this topic in Hungary. Orv. Hetil., 2011, 152, 1698–1702.

Monitoring of the leading causative agents of osteomyelitis and their antibiotic resistance

2020 ◽  
Vol 65 (9) ◽  
pp. 562-566
Author(s):  
I. V. Shipitsyna ◽  
E. V. Osipova ◽  
O. A. Astashova ◽  
D. S. Leonchuk
Keyword(s):  
Antibiotic Resistance ◽  
Species Composition ◽  
Antibiotic Sensitivity ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Methicillin Resistant ◽  
Causative Agents ◽  
Resistant Strains ◽  
Bacterial Associations

The annual monitoring of the species composition of the causative agents of osteomyelitis, the identification of antibiotic-resistant strains, the study of the species composition of associations of microorganisms, their adhesive activity will prevent the spread of infection. Analyze the spectrum of the leading causative agents of osteomyelitis, their antibiotic sensitivity, and also the adhesive activity of the identified bacterial associations. A microbiological analysis of 2197 smears of adult patients with various etiological forms of osteomyelitis who were treated in the departments of the purulent center of the FSBI «NMRCTO» of the RF Ministry of Health in 2019. The spectrum of pathogenic microflora, sensitivity to standard antibacterial drugs used in the clinic was studied. The biofilm-forming ability of associations of microorganisms was investigated. According to the conducted microbiological monitoring for 2019, the microflora spectrum for osteomyelitis is diverse, the main pathogens are S. aureus, S. epidermidis, P. aeruginosa, K. pneumoniae, Enterococcus sp. A high percentage of isolation of microbial associations was noted, most often mix cultures of gram-positive and gram-negative bacteria. Bacterial associations: S. aureus + P. aeruginosa, S. aureus + S. marcescens, S. aureus + A. baumannii, S. epidermidis + E. cloacae - actively formed a biofilm on the surface of polystyrene plates, and the adhesive potential depended on interstrain relations in the composition of the formed biofilm. Among Gram-negative microflora, multiresistant strains prevail, among Gram-positive microflora - a high percentage of methicillin-resistant Staphylococci. When analyzing the antibiotic sensitivity of the isolated microorganisms, a high percentage of resistant strains is noted. So, with respect to enterobacteria, β-lactam antibiotics, drugs from the group of aminoglycosides, turned out to be ineffective. Among non-fermenting gram-negative bacteria, A. baumannii strains had multiple antimicrobial resistance. Among gram-positive microorganisms, a high percentage of isolation of methicillin-resistant staphylococci was noted. The specificity of the course of the disease and measures aimed at eliminating the pathogen depend on the species composition in the focus of infection. The study of the etiological structure of osteomyelitis, the monitoring of the antibiotic resistance of pathogens and their persistent potential, makes it possible to adopt sound tactics of conservative and surgical treatment.

DEPENDENCE OF BIOFILM-FORMING ABILITY ON THE ANTIBIOTIC SENSITIVITY OF PSEUDOMONAS AERUGINOSA CLINICAL STRAINS ISOLATED FROM PATIENTS WITH CHRONIC OSTEOMYELITIS

2020 ◽  
Vol 65 (1) ◽  
pp. 37-41
Author(s):  
I. V. Shipitsyna ◽  
E. V. Osipova ◽  
E. N. Ovchinnikov ◽  
D. S. Leonchuk
Keyword(s):  
Biofilm Formation ◽  
Chronic Osteomyelitis ◽  
Antibiotic Sensitivity ◽  
Antibiotic Resistant ◽  
Clinical Strains ◽  
Wide Range ◽  
Adhesive Ability ◽  
Resistant Strains ◽  
Clinically Significant ◽  
Tubular Bones

Due to the spreading highly resistant strains among clinically significant P. aeruginosa clones, it becomes necessary to prescribe antibiotics not only taking into account the knowledge of sensitivity spectrum of a particular isolate but the data of microorganism biofilm activity as well. To study the dependence of biofilm-forming ability on the sensitivity to antibacterial preparations of P. aeruginosa clinical strains, isolated from patients with chronic osteomyelitis. 36 patients above 18 with chronic osteomyelitis of long tubular bones who were treated in the center of purulent osteology took part in the experiment. Object of the study - material isolated from wounds, fistulas, as well as from inflammatory foci. The sensitivity of isolated microorganisms to 10 antibiotics was analyzed: Piperacillin/Tazobactam, Imipenem, Meropenem, Aztreonam, Amikacin, Ciprofloxacin, Ceftriaxone, Ceftazidime, Cefotaxime, Cefepime. High- and medium-adhesive strains accounted for 86,1 % among P. aeruginosa clinical isolates, obtained from the wounds of patients with chronic osteomyelitis of long tubular bones. Highly adhesive strains are resistant to a wide range of antibacterial preparations used clinically. Penicillins were the most effective preparations when analyzing antibioticograms obtained for highly adhesive strains, for medium adhesive strains - penicillins, aminoglycosides and carbapenems, for low adhesive ones - aminoglycosides, penicillins, carbapenems, monobactams, quinolones. P. aeruginosa multi-resistance is a serious problem in the treatment of patients with chronic osteomyelitis. Spreading antibiotic-resistant strains of P. aeruginosa is associated with the presence of bacteria in the biofilm. Since adhesion is the first step in the biofilm formation, it is important to identify strains having high adhesive ability timely.

scholarly journals The structure of alanine racemase fromAcinetobacter baumannii

2014 ◽  
Vol 70 (9) ◽  
pp. 1199-1205 ◽  
Author(s):  
Emily Davis ◽  
Emma Scaletti-Hutchinson ◽  
Helen Opel-Reading ◽  
Yoshio Nakatani ◽  
Kurt L. Krause
Keyword(s):  
Drug Target ◽  
Alanine Racemase ◽  
Negative Bacterium ◽  
Design Studies ◽  
Structure Based Drug Design ◽  
Antibiotic Resistant ◽  
Hospital Acquired Infections ◽  
Antibiotic Drug ◽  
Resistant Strains ◽  
Hospital Acquired

Acinetobacter baumanniiis an opportunistic Gram-negative bacterium which is a common cause of hospital-acquired infections. Numerous antibiotic-resistant strains exist, emphasizing the need for the development of new antimicrobials. Alanine racemase (Alr) is a pyridoxal 5′-phosphate dependent enzyme that is responsible for racemization between enantiomers of alanine. As D-alanine is an essential component of the bacterial cell wall, its inhibition is lethal to prokaryotes, making it an excellent antibiotic drug target. The crystal structure ofA. baumanniialanine racemase (AlrAba) from the highly antibiotic-resistant NCTC13302 strain has been solved to 1.9 Å resolution. Comparison of AlrAbawith alanine racemases from closely related bacteria demonstrates a conserved overall fold. The substrate entryway and active site of the enzymes were shown to be highly conserved. The structure of AlrAbawill provide the template required for future structure-based drug-design studies.

scholarly journals Evidence of Another Anthropic Impact on Iguana delicatissima from the Lesser Antilles: The Presence of Antibiotic Resistant Enterobacteria

Antibiotics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 885
Author(s):  
Gustavo Di Lallo ◽  
Marco Maria D’Andrea ◽  
Samanta Sennati ◽  
Maria Cristina Thaller ◽  
Luciana Migliore ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Animal Species ◽  
Susceptibility Testing ◽  
Acquired Resistance ◽  
Climatic Conditions ◽  
Antibiotic Resistant ◽  
Associated Bacteria ◽  
Improper Use ◽  
Resistant Strains ◽  
Drug Resistant Strains

The improper use of antibiotics by humans may promote the dissemination of resistance in wildlife. The persistence and spread of acquired antibiotic resistance and human-associated bacteria in the environment, while representing a threat to wildlife, can also be exploited as a tool to monitor the extent of human impact, particularly on endangered animal species. Hence, we investigated both the associated enterobacterial species and the presence of acquired resistance traits in the cloacal microbiota of the critically endangered lesser Antillean iguana (Iguana delicatissima), by comparing two separate populations living in similar climatic conditions but exposed to different anthropic pressures. A combination of techniques, including direct plating, DNA sequencing and antimicrobial susceptibility testing allowed us to characterize the dominant enterobacterial populations, the antibiotic resistant strains and their profiles. A higher frequency of Escherichia coli was found in the samples from the more anthropized site, where multi-drug resistant strains were also isolated. These results confirm how human-associated bacteria as well as their antibiotic-resistance determinants may be transferred to wildlife, which, in turn, may act as a reservoir of antibiotic resistance.

scholarly journals Virtual Reality Module Depicting Catheter-Associated Urinary Tract Infection as Educational Tool to Reduce Antibiotic Resistant Hospital-Acquired Bacterial Infections

2020 ◽  
Author(s):  
Yosra M Mekki ◽  
Mohamed M Mekki ◽  
Mohamed Hamammi ◽  
Susu Zughaier
Keyword(s):  
Medical Education ◽  
Virtual Reality ◽  
Antibiotic Resistance ◽  
Learning Outcomes ◽  
Health Care Providers ◽  
Resistant Bacteria ◽  
Educational Tool ◽  
Care Providers ◽  
Antibiotic Resistant ◽  
Hospital Acquired

Introduction: Virtual reality (VR) and augmented reality (AR) are used as simulation models in student-patient interactive medical education and shown to enhance learning outcomes. The rise in global burden of infectious diseases and antibiotic resistance world-wide prompt immediate action to combat this emerging threat. Catheter associated urinary infections (CAUTI) are the leading cause of hospital-acquired infections. The aim of this research is to develop a virtual reality (VR) based educational tool depicting the process of CAUTI caused by antibiotic resistant bacteria. The VR-CAUTI module is designed to provide insights to health care providers and community which help in reducing the burden of antibiotic resistant infections. Material and methods: The VRCAUTI module is designed using tools including Blender, Cinema4D and Unity to create a scientifically accurate first-person interactive movie. The users are launched inside a human bladder that needs to be drained. They can witness the insertion of a medical catheter into the bladder to drain the urine. Bacteria adhere to the catheter to establish colonization and infection. An interaction between antibiotic molecules and bacteria in the biofilm is observed later. After designing the 3D models, a highlight of the interaction between models, taken from the storyboard, is used to determine the necessary animation. Moreover, dialogue that facilitates the understanding of infections and antibiotic resistance is recorded. This is followed by the assembly of the module on Unity, and enrichments such as lights and orientation. Results and conclusion: This VRCAUTI module is the proof-of-concept for designing detailed VR based scientifically very accurate medical simulation that could be used in medical education to maximize learning outcomes. VR based modules that have the potential to transform and revolutionize learning experience and render medical education compatible with the IoT in the current 4th industrial revolution.

scholarly journals Wastewater disinfection by solar heterogeneous photocatalysis: effect on tetracycline resistant/sensitive Enterococcus strains

2014 ◽  
Vol 16 (3) ◽  
pp. 455-462 ◽  
Keyword(s):  
Antibiotic Resistance ◽  
Treatment Plant ◽  
Heterogeneous Photocatalysis ◽  
Resistance Pattern ◽  
Urban Wastewater ◽  
Antibiotic Resistant ◽  
Disinfection Process ◽  
Wastewater Disinfection ◽  
Resistant Strains ◽  
Urban Wastewater Treatment

<div> <p>Solar simulated heterogeneous photocatalysis (SSHP) with suspended TiO<sub>2</sub> was investigated in the inactivation of tetracycline resistant/sensitive <em>Enterococcus</em> (TRE/TSE) strains in the effluent of an urban wastewater treatment plant (UWTP). The effect of solar simulated disinfection (SSD) on the inactivation of the same <em>Enterococcus</em> strains was investigated as control. SSHP process (0.05 g l<sup>-1</sup> of TiO<sub>2</sub>) was found to be effective in the inactivation of both <em>Enterococcus</em> strains with total inactivation (~7 log unit) observed after 60 min of irradiation. On the contrary, SSD process did not show any significant inactivation after 90 min of irradiation. The effect of both processes on the antibiotic resistance phenotypes of the surviving enterococci was also evaluated. TRE cells surviving the SSHP treatment showed that disinfection process did not affect the antibiotic resistance pattern after 45 min irradiation. The same was observed for the TSE strain. Accordingly, antibiotic resistance can spread into the receiving water body when antibiotic resistant strains survive to disinfection process.</p> </div> <p>&nbsp;</p>

scholarly journals A new group of compounds derived from 4-, 5-, 6- and 7-aminoindoles with antimicrobial activity

2018 ◽  
Vol 4 (3) ◽  
pp. 27-36 ◽  
Author(s):  
Irina Stepanenko ◽  
Semen Yamashkin ◽  
Yuliya Kostina ◽  
Alyona Batarsheva ◽  
Mikhail Mironov
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antibiotic Resistance ◽  
Biologically Active ◽  
Diffusion Method ◽  
Significant Activity ◽  
Clinical Strains ◽  
Causative Agents ◽  
New Compounds

Introduction. The problem of antibiotic resistance of microorganisms is becoming more urgent in the twenty-first century. Microorganisms possess an evolutionary adaptive capacity. Non-adherence to the basic principles of rational antibiotic therapy leads to menacing consequences. More and more pathogenic microbes are becoming resistant to two or more antibiotics. The search for new compounds with antimicrobial activity is one of the principles for overcoming the antibiotic resistance of microorganisms. Materials and methods. Eighteen test-strains of microorganisms and more than 2000 clinical strains of microorganisms, representating the families Micrococcaceae, Streptococcaceae, Enterobacteriaceae, Moraxellaceae, Pseudomonadaceae, Sphingomonadaceae, Xanthomonadaceae were studied for sensitivity to the compounds derived from 4-, 5-, 6- and 7-aminoindoles. A method of serial dilutions to determine the minimal inhibitory concentration (MIC) of the compounds under study was used in the study, as well as a disc diffusion method. Results and discussion. Sensitivity of the test-strains and of clinical strains of microorganisms to the resulting compounds was studied. The compounds based on substituted 4-, 5-, 6-, 7-aminoindoles showed different activity against the test strains and experimental strains of microorganisms in vitro. It was found that the marked antibacterial activity was exhibited by the compounds containing a trifluoromethyl group. The most significant activity was noted in amides and pyrroloquinolones based on 4-aminoindole, 6-aminoindole and 7-aminoindole.The most effective compounds with laboratory codes 5D, 7D, 39D, S3, HD, 4D showed a pronounced antibacterial activity. Conclusion. Antimicrobial activity of the substituted amides and pyrroloquinolines on the basis of 4-, 5-, 6-, 7-aminoindoles was etermined in our study, as well as the spectra of their action against Gram-positive and Gram-negative microorganisms, which are causative agents of non-specific and certain specific human infectious diseases. Moreover, we evaluated the synthetic potentials of the substituted 4-, 5-, 6-, 7-aminoindoles as the starting compounds for synthesizing a series of indolylamides and pyrroloquinolines. Also, the prospects for targeted synthesis of biologically active compounds based on indole-type aromatic amines were determined.

scholarly journals Topical issues of inhaled antibacterial therapy of respiratory diseases in children

2018 ◽  
pp. 128-131 ◽  
Author(s):  
N. G. Kolosova ◽  
A. B. Kolosova
Keyword(s):  
Antibiotic Resistance ◽  
Antibiotic Therapy ◽  
Respiratory Diseases ◽  
Respiratory Infections ◽  
Infectious Agents ◽  
Antibiotic Resistant ◽  
Restriction Policy ◽  
Resistant Strains ◽  
Outpatient Practice ◽  
Systemic Antibiotics

Despite the fact that acute respiratory infections have viral etiology, the frequency of antibiotic prescriptions accounts for more than 70% in outpatient practice. However, the preventive administration of systemic antibiotics does not reduce the duration of the disease and the incidence of bacterial complications. In addition, the irrational use of antibiotic therapy can lead to the development of antibiotic resistance of infectious disease pathogens. The global problem of antibiotic resistance is seen as a serious threat to public health, and therefore the systemic antibiotic restriction policy is crucial, which helps to reduce the formation of antibiotic-resistant strains of infectious agents. The possibility of using local antibacterial drugs enables optimization of antibiotic therapy and reduces the risk of the development of antibiotic resistance. The article discusses the issues of use of thiamphenicol glycinate acetylcysteinate in various diseases in children.

Sign in / Sign up

Export Citation Format

Share Document