scholarly journals The study of antibacterial activity of some plant extracts against causes of pneumonia

2011 ◽  
Vol 8 (2) ◽  
pp. 248-254
Author(s):  
Baghdad Science Journal
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Penicillin G ◽  
Cydonia Oblonga ◽  
Resistance To Penicillin ◽  
Resistant Strains ◽  
Inhibition Zones ◽  
Antibiotics Sensitivity ◽  
Eucalyptus Microtheca

Eighty five samples were taken from patients suffering from pneumonia. Seventy-eight isolates were diagnosed as following: Staphylococcus aureus (23), klebsiella pneumoniae (29), Streptococcus pneumoniae (15), Serratia sp. (4), Haemophilus influenzae (4) and Pseudomonas aeruginosa (3). The clinical isolates were tested for antibiotics sensitivity. They appeared highly resistance to penicillin G and Ampicillin at percentage 89.7 and 84.6% respectly while the results showed highly sensitivity to streptomycin at percentege of (12.8%). To study the antibacterial activity of Alium sativum, Eucalyptus microtheca leaves and Cydonia oblonga seeds extracts, five multi resistant strains were used by using agar well diffusion and disk methods at concentrations of (24, 12, 6, 3)%. The agar well diffusion was prefered for both of Alium sativum and Eucalyptus microthesca extracts while both methods were prefered for Cydonia oblonga extract by measuring inhibition zones .The results showed antibacterial activity of Alium sativum on S.aureus and S. pneumoniae at concentration 3-24 % and for klebsiella pneumoniae at concentration of 6-24%While it was 12-24%for Serratia sp. and Pseudomonas aeruginosa. Eucalyptus microtheca extracts showed antibacterial at concentration of 24-3%for S.aureus, S. pneumoniae and Ps. aeruginosa. While K. pneumoniae and Serratia sp sensitive at concartatins of 24%. The ethanol and oil extracts of Cydonia oblonga seeds had anti bacterial activity at all concentrations for all strains except Serratia sp. showed sensitivity at concentrations of 24-6%for both extracts.

scholarly journals A Novel Cecropin D-Derived Short Cationic Antimicrobial Peptide Exhibits Antibacterial Activity Against Wild-Type and Multidrug-Resistant Strains of Klebsiella pneumoniae and Pseudomonas aeruginosa

2020 ◽  
Vol 16 ◽  
pp. 117693432093626
Author(s):  
Iván Darío Ocampo-Ibáñez ◽  
Yamil Liscano ◽  
Sandra Patricia Rivera-Sánchez ◽  
José Oñate-Garzón ◽  
Ashley Dayan Lugo-Guevara ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Multidrug Resistant ◽  
Clinical Isolates ◽  
Health Concern ◽  
Wild Type ◽  
Cationic Antimicrobial Peptide ◽  
Promising Alternative ◽  
Resistant Strains

Infections caused by multidrug-resistant (MDR) Pseudomonas aeruginosa and Klebsiella pneumoniae are a serious worldwide public health concern due to the ineffectiveness of empirical antibiotic therapy. Therefore, research and the development of new antibiotic alternatives are urgently needed to control these bacteria. The use of cationic antimicrobial peptides (CAMPs) is a promising candidate alternative therapeutic strategy to antibiotics because they exhibit antibacterial activity against both antibiotic susceptible and MDR strains. In this study, we aimed to investigate the in vitro antibacterial effect of a short synthetic CAMP derived from the ΔM2 analog of Cec D-like (CAMP-CecD) against clinical isolates of K pneumoniae (n = 30) and P aeruginosa (n = 30), as well as its hemolytic activity. Minimal inhibitory concentrations (MICs) and minimal bactericidal concentrations (MBCs) of CAMP-CecD against wild-type and MDR strains were determined by the broth microdilution test. In addition, an in silico molecular dynamic simulation was performed to predict the interaction between CAMP-CecD and membrane models of K pneumoniae and P aeruginosa. The results revealed a bactericidal effect of CAMP-CecD against both wild-type and resistant strains, but MDR P aeruginosa showed higher susceptibility to this peptide with MIC values between 32 and >256 μg/mL. CAMP-CecD showed higher stability in the P aeruginosa membrane model compared with the K pneumoniae model due to the greater number of noncovalent interactions with phospholipid 1-Palmitoyl-2-oleyl-sn-glycero-3-(phospho-rac-(1-glycerol)) (POPG). This may be related to the boosted effectiveness of the peptide against P aeruginosa clinical isolates. Given the antibacterial activity of CAMP-CecD against wild-type and MDR clinical isolates of P aeruginosa and K pneumoniae and its nonhemolytic effects on human erythrocytes, CAMP-CecD may be a promising alternative to conventional antibiotics.

scholarly journals Genetic Characteristics and Range of Antibacterial Activity of the Bacteriophages, which are a Part of Manufactured Serie of Drugs - Pyobacteriophage Polyvalent Purified

2016 ◽  
Vol 15 (2) ◽  
pp. 93-100 ◽  
Author(s):  
N. V. Tikunova ◽  
N. N. Voroshilov ◽  
O. A. Polygach ◽  
V. V. Morozova ◽  
A. Y. Tikunov ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Klebsiella Pneumoniae ◽  
Early Age ◽  
Allergic Reactions ◽  
High Concentration ◽  
Genetic Characteristics ◽  
Staphylococcus Spp ◽  
High Degree

Pyobacteriophage polyvalent cleared (preparation) is active against 85.0 - 99.6% clinical strains of bacteria Proteus spp., Streptococcus spp., Klebsiella pneumoniae, Escherichia coli, Staphylococcus spp., and Pseudomonas aeruginosa. The preparation surpasses the majority of antibiotics in the width of a range of antibacterial activity and is comparable only with modern antibiotics of the last generations. Unlike the majority of antibiotics, the preparation doesn't cause toxic and allergic reactions, has no contraindications to application, including age, is allowed for use for newborns and children of early age that gives the chance to regard him as highly effective and safe medicine for antibacterial therapy. The results of metagenomic analysis of pyobacteriophage polyvalent cleared indicate that the product contains only lytic bacteriophages and does not contain lysogenic bacteriophages, that guarantees high concentration of lytic bacteriophages in a preparation high degree of his antibacterial and clinical efficiency and genetic safety of its clinical application.

scholarly journals Pola Kepekaan Bakteri terhadap Antibiotik di Ruang Rawat Intensif RSPI Prof. Dr. Sulianti Saroso Jakarta

2017 ◽  
Vol 1 (2) ◽  
pp. 23
Author(s):  
Putriana Indah Lestari ◽  
Ika Susanti ◽  
Huda Rahmawati
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Klebsiella Pneumoniae ◽  
Acinetobacter Baumannii ◽  
Antibiotic Sensitivity ◽  
Secondary Data ◽  
Sensitivity Pattern ◽  
Important Health ◽  
Antibiotic Sensitivity Test ◽  
Antibiotics Sensitivity

Abstrak : Penyakit infeksi merupakan salah satu masalah kesehatan yang penting. Penggunaan antibiotik yang tidak rasional dan tepat guna pada pasien penyakit infeksi beresiko menyebabkan terjadinya resistensi. Tujuan dari penelitian ini yaitu untuk mengetahui pola kepekaan bakteri terhadap antibiotik pada pasien Ruang Rawat Intensif (ICU) RSPI Prof. Dr. Sulianti Saroso (RSPI-SS) Jakarta. Penelitian dilakukan deskriptif dan retrospektif terhadap data sekunder hasil uji kepekaan antibiotik dan jenis bakteri dari 107 pasien dalam kurun waktu 2011. Hasil menunjukkan 68 (65,4%) pasien mendapatkan hasil kultur positif dan uji kepekaan bakteri terhadap antibiotik. Jenis bakteri patogen yang dominan yaitu Acinetobacter baumannii (29,4%), disusul oleh Pseudomonas aeruginosa (27,9%), Klebsiella pneumoniae (13,2%) dan Escherichia coli (8,8%). Sebagian besar bakteri pada pasien ICU RSPISS telah berkurang kepekaannya (resisten) terhadap beberapa antibiotik. A. baumannii dan P. aeruginosa merupakan bakteri yang paling resisten terhadap antibiotik uji. Pola kepekaannya menunjukkan bahwa bakteri patogen mempunyai resistensi tertinggi terhadap erythromycin dan terendah terhadap amikasin.Infectious diseases is an important health problem. Irrational antibiotics usage is a leading cause in initiating drugs resistances. A preliminary study was conducted on the sensitivity pattern of microorganisms against antibiotics at the intensive care unit of Sulianti Infectious Diseases Hospital Jakarta. Retrospective. Secondary data were collected on the results of antibiotics sensitivity tests and species of microorganisms of 107 patients during the year 2011. Sixty eight (65,4%) patients were positive on microorganism culture test and tested on antibiotic sensitivity test. Predominance pathogenic species found were Acinetobacter baumannii (29,4%), followed by Pseudomonas aeruginosa (27,9%), Klebsiella pneumoniae (13,2%) and Escherichia coli (8,8%). Most species were less sensitive (resistant) to several antibiotics. The pattern of sensitivity showed that pathogenic microorganisms were the most resistant against erythromycin and the most sensitive antibiotics was amikacin.

scholarly journals Novel Pt-Ag3PO4/CdS/Chitosan Nanocomposite with Enhanced Photocatalytic and Biological Activities

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2320
Author(s):  
Mahsa Kiani ◽  
Mojtaba Bagherzadeh ◽  
Reyhaneh Kaveh ◽  
Navid Rabiee ◽  
Yousef Fatahi ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Photocatalytic Activity ◽  
Klebsiella Pneumoniae ◽  
Visible Light ◽  
Salmonella Typhimurium ◽  
Bacillus Cereus ◽  
Visible Light Irradiation ◽  
Light Irradiation

Decorating photocatalysts with noble metal nanoparticles (e.g., Pt) often increases the catalysts’ photocatalytic activity and biomedical properties. Here, a simple and inexpensive method has been developed to prepare a Pt-Ag3PO4/CdS/chitosan composite, which was characterized and used for the visible light-induced photocatalytic and antibacterial studies. This synthesized composite showed superior photocatalytic activity for methylene blue degradation as a hazardous pollutant (the maximum dye degradation was observed in 90 min of treatment) and killing of Gram positive bacterial (Staphylococcus aureus and Bacillus cereus) as well as Gram negative bacteria (Klebsiella pneumoniae, Salmonella typhimurium, Escherichia coli, and Pseudomonas aeruginosa) under visible light irradiation. The antibacterial activity of CdS, CdS/Ag3PO4, and Pt-Ag3PO4/CdS/chitosan against E. coli, Pseudomonas aeruginosa, Salmonella typhimurium, Klebsiella pneumoniae, Staphylococcus aureus, and Bacillus cereus showed the zone of inhibition (mm) under visible light and under dark conditions at a concentration of 20 µg mL−1. Furthermore, the cell viability of the CdS/chitosan, Ag3PO4, Ag3PO4/CdS/chitosan, and Pt-Ag3PO4/CdS/chitosan were investigated on the human embryonic kidney 293 cells (HEK-293), Henrietta Lacks (HeLa), human liver cancer cell line (HepG2), and pheochromocytoma (PC12) cell lines. In addition, the results indicated that the photodegradation rate for Pt-Ag3PO4/CdS/chitosan is 3.53 times higher than that of CdS and 1.73 times higher than that of the CdS/Ag3PO4 composite. Moreover, Pt-Ag3PO4/CdS/chitosan with an optimal amount of CdS killed large areas of different bacteria and different cells separately in a shorter time period under visible-light irradiation, which shows significantly higher efficiency than pure CdS and other CdS/Ag3PO4 composites. The superb performances of this composite are attributed to its privileged properties, such as retarded recombination of photoinduced electron/hole pairs and a large specific surface area, making Pt-Ag3PO4/CdS/chitosan a valuable composite that can be deployed for a range of important applications, such as visible light-induced photocatalysis and antibacterial activity.

Antibiotic resistance and bacteriophages commercial drugs susceptibility of Klebsiella pneumonia and Pseudomonas aeruginosa clinical strains

2021 ◽  
pp. 73-80
Author(s):  
D. A. Sedova ◽  
A. S. Kaljuzhin ◽  
Juliya Alexandrovna Romanovskaya
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibiotic Resistance ◽  
Klebsiella Pneumoniae ◽  
High Resistance ◽  
Hemolytic Activity ◽  
Clinical Isolates ◽  
Klebsiella Pneumonia ◽  
Clinical Strains ◽  
Resistant Strains ◽  
High Degree

The article provides information about hemolytic activity, susceptibility to different groups of antibiotics and bacteriophages commercial drugs of Klebsiella pneumoniae and Pseudomonas aeruginosa clinical strains. The analysis of the obtainedresults showed a high degree of hemolytic activity dissemination among Pseudomonas aeruginosa (78,60 % of strains), as well as their high resistance to cefotaxime, chloramphenicol, azithromycin and tetracycline (82,14–100 % of resistant strains). K. pneumoniae clinical isolates were resistant to cefazolin, azithromycin, and the nitrofuran group (66,67–81,48 %). In turn, specific phagolysates for treatment deseases of K. pneumoniae and P. aeruginosa etiology showed the greatest efficiency against both groups of microorganisms among the studied commercial preparations of bacteriophages.

Effects of Brazilian green propolis extract on planktonic cells and biofilms of multidrug-resistant strains of Klebsiella pneumoniae and Pseudomonas aeruginosa

Biofouling ◽  
2020 ◽  
Vol 36 (7) ◽  
pp. 834-845
Author(s):  
Pâmela Beatriz do Rosário Estevam dos Santos ◽  
Damara da Silva Ávila ◽  
Lucas de Paula Ramos ◽  
Amanda Romagnoli Yu ◽  
Carlos Eduardo da Rocha Santos ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Klebsiella Pneumoniae ◽  
Multidrug Resistant ◽  
Planktonic Cells ◽  
Propolis Extract ◽  
Resistant Strains ◽  
Brazilian Green Propolis

scholarly journals Activities of a New Oral Streptogramin, XRP 2868, Compared to Those of Other Agents against Streptococcus pneumoniae and Haemophilus Species

2003 ◽  
Vol 47 (10) ◽  
pp. 3270-3274 ◽  
Author(s):  
Glenn A. Pankuch ◽  
Linda M. Kelly ◽  
Gengrong Lin ◽  
Andre Bryskier ◽  
Catherine Couturier ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Streptococcus Pneumoniae ◽  
Haemophilus Influenzae ◽  
Antibacterial Agents ◽  
Penicillin G ◽  
Haemophilus Parainfluenzae ◽  
Haemophilus Species ◽  
Resistant Strains ◽  
Erythromycin A ◽  
Low Activity

ABSTRACT MIC methodology was used to test the antibacterial activity of XRP 2868, a new oral combination of two semisynthetic streptogramins, RPR 132552A and RPR 202868, compared to activities of other antibacterial agents against pneumococci, Haemophilus influenzae, and Haemophilus parainfluenzae. For 261 pneumococci, XRP 2868 and pristinamycin MICs were similar, irrespective of penicillin G and erythromycin A susceptibilities (MIC at which 50% of isolates were inhibited [MIC50], 0.25 μg/ml; MIC90, 0.5 μg/ml), while quinupristin/dalfopristin had MICs which were 1 to 2 dilutions higher. Single components of both XRP 2868 and quinupristin/dalfopristin had higher MICs. Erythromycin A, azithromycin, clarithromycin, and clindamycin MICs were higher for penicillin G-intermediate and -resistant than -susceptible pneumococci. Against 150 H. influenzae strains, all compounds tested had unimodal MIC distributions. XRP 2868 had an overall MIC50 of 0.25 μg/ml and an MIC90 of 1.0 μg/ml, with no differences between β-lactamase-positive, β-lactamase-negative, and β-lactamase-negative ampicillin-resistant strains. Of note was the similarly low activity of one of its components, RPR 132552A. Pristinamycin and quinupristin/dalfopristin had MICs of 0.125 to 8.0 μg/ml; quinupristin alone had MICs of 8.0 to >64.0 μg/ml, and dalfopristin had MICs of 1.0 to >64.0 μg/ml. Erythromycin A, azithromycin, and clarithromycin had modal MICs of 4.0, 1.0, and 8.0 μg/ml, respectively. MICs of all compounds against H. parainfluenzae were 1 to 2 dilutions higher than against H. influenzae. XRP 2868 showed potent activity against pneumococci and Haemophilus strains irrespective of their susceptibility to other agents.

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