scholarly journals Bio-prospective potential of Pleurotus djamor and Pleurotus florida mycelial extracts towards gram positive and gram negative microbial pathogens causing infectious disease

2021 ◽  
Author(s):  
Ramanaiah Illuri ◽  
Eyini M. ◽  
Kumar M. ◽  
Suresh Babu R. ◽  
Prema P. ◽  
...  
Keyword(s):  
Infectious Disease ◽  
Microbial Pathogens ◽  
Gram Positive ◽  
Gram Negative ◽  
Pleurotus Florida ◽  
Pleurotus Djamor

Effectiveness of ZnO Nano Particles against the Foodborne Microbial Pathogens E. coli and S. aureus

2020 ◽  
Vol 15 (2) ◽  
pp. 87-94
Keyword(s):  
Antimicrobial Agents ◽  
Inhibitory Concentration ◽  
Antimicrobial Effect ◽  
Nano Particles ◽  
Microbial Pathogens ◽  
Gram Positive ◽  
Gram Negative ◽  
E Coli ◽  
Antimicrobial Susceptibility Tests ◽  
Susceptibility Tests

In this work, various concentrations of ZnO nano particles, prepared by the coprecipitation method with a size range of 47-68 nm, have been investigated as antimicrobial agents. Dilution antimicrobial susceptibility tests were carried out on two kinds of microbes (Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli) according to the standard method recommended by Clinical and Laboratory Standards Institute, CLSI-2015-M07-A10. The results showed that the antimicrobial effect is larger, the higher the concentration of ZnO nano particles in solution. It was also found that Gram-positive microbes are more sensitive to ZnO nano particles when compared with the Gram-negative ones. The minimum inhibitory concentration (MIC) for E. coli was found to be 50 mg/mL while that for S. aureus was 25 mg/mL. The minimum bactericidal concentration (MBC) was 1600 mg/mL for E. coli and 800 mg/mL for S. aureus.

A strategy of antimicrobial therapy of pelvic inflammatory diseases at antibiotic resistance of microbial pathogens

GYNECOLOGY ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 60-63
Author(s):  
Tatiana Yu Pestrikova ◽  
Elena A Yurasova ◽  
Igor V Yurasov
Keyword(s):  
Antibiotic Resistance ◽  
Antimicrobial Therapy ◽  
Inflammatory Diseases ◽  
Combined Therapy ◽  
Treatment Options ◽  
Anaerobic Bacteria ◽  
Microbial Flora ◽  
Microbial Pathogens ◽  
Gram Positive ◽  
Gram Negative

Relevance. Antibiotic resistance of microbial pathogens is an interdisciplinary and interstate problem of major medical and socio-economic importance. If multiresistant microbial flora is detected in patients with acute or chronic forms of pelvic inflammatory diseases alternative antimicrobial combined therapy an advisability should be considered. Current trends of an increase in multiresistant gram-negative infections along with limited range of alternative treatment options dictate a need for further research. Study of alternative antibiotics effectiveness in pelvic inflammatory diseases treatment is necessary for a further development of optimal treatment regimens. Aim. To search for adequate combinations of antimicrobial therapy aimed at antibiotic-resistant pathogens. Materials and methods. To write this review a search for domestic and foreign publications in Russian and international search systems (PubMed, eLibrary, etc.) for the last 2-12 years was conducted. The review includes articles from peer-reviewed literature. Results. Fosfomycin possesses a broad spectrum of antibacterial effects including gram-positive and gram-negative aerobic bacteria. The drug is highly effective against Pseudomonas aeruginosa and Escherichia coli, anaerobic bacteria (Proteus mirabilis and Klebsiella pneumoniae) as well as against gram- positive bacteria (Staphylococcus spp., including S. aureus, S. epidermidis; Streptococcus spp., including Enterococcus faecalis). Conclusions. When multiresistant microbial flora is detected in patients with acute or chronic forms of pelvic inflammatory diseases an advisability of fosfomycin administration should be considered.

scholarly journals Biocidal activity of chicken defensin-9 against microbial pathogens

2016 ◽  
Vol 94 (2) ◽  
pp. 176-187 ◽  
Author(s):  
Haitham A. Yacoub ◽  
Salem M. El-Hamidy ◽  
Maged M. Mahmoud ◽  
Mohamed Nabih Baeshen ◽  
Hussein A. Almehdar ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Pathogenic Bacteria ◽  
Sequence Similarity ◽  
Expression Patterns ◽  
Antimicrobial Activities ◽  
Microbial Pathogens ◽  
Bacterial Cells ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Gram Negative

In this study we identified the expression patterns of β-defensin-9 in chickens from Saudi Arabia, evaluated the antimicrobial activities of synthetic chicken β-defensin-9 (sAvBD-9) against pathogenic bacteria and fungi, and investigated the mode of action of sAvBD-9 on bacterial cells. The AvBD-9 gene of Saudi chickens encodes a polypeptide of 67 amino acids, which is highly similar to the polypeptide in duck, quail, and goose (97%, 86%, and 87%, respectively) and shares a low sequence similarity with the mammalian defensins. AvBD-9 is expressed in various organs and tissues of Saudi chickens and inhibits the growth of both Gram-negative and Gram-positive bacteria, as well as showing activity against unicellular and multicellular fungi (Aspergillus flavus, A. niger, and Candida albicans). sAvBD-9 completely inhibited the growth of both Gram-positive and Gram-negative bacterial strains as well as Candida albicans. The haemolytic effects of sAvBD-9 were limited. Morphological analysis by TEM revealed that sAvBD-9 induces shortening and swelling of Staphylococcus aureus and Shigella sonni cells, opens holes and deep craters in their envelopes, and leads to the release of their cytoplasmic content. Our data shed light on the potential applications of sAvBD-9 in the pharmaceutical industry.

scholarly journals POLA BAKTERI DAN USIA PASIEN TERHADAP PROKALSITONIN DI PNEUMONIA KOMUNITAS DAN NOSOKOMIAL

2018 ◽  
Vol 21 (2) ◽  
pp. 153
Author(s):  
Coriejati Coriejati ◽  
Mohammad Iqbal ◽  
Emmy Hermyanti Pranggono
Keyword(s):  
Infectious Disease ◽  
Mortality Rate ◽  
Bacterial Infection ◽  
Community Acquired Pneumonia ◽  
Sectional Study ◽  
Gram Positive ◽  
Gram Negative ◽  
Hospital Acquired Pneumonia ◽  
The Difference ◽  
Hospital Acquired

Pneumonia is one of an infectious disease with high mortality rate. In the last decade procalcitonin (PCT) was found as a biomarkerthat can predict a kind of infection. The aim of the study was to know the difference of PCT level between community acquired pneumonia(CAP) and hospital acquired pneumonia (HAP) by analyzing it, and the difference between <60 years old and older age patients. Across-sectional study was conducted on the CAP and HAP patients in RSHS, in August–October 2009. The level difference were analyzedwith Mann-Whitney test, with a significancy of p<0.05. In this study 40 (forty) patients (66%) CAP and 21 patients (34%) HAP wereincluded. The median of PCT levels in CAP was 0.88 ng/dL and HAP 8.32 ng/dL (p=0.002), where as in the in Gram negative bacterialinfection (GNBI) level in CAP was 4.76 ng/dL and in Gram positive was 0.61 ng/dL. The median PCT level in HAP with Gram negativewas 19.02 ng/dL and in the Gram positive was 4.63 ng/dL (p=0.201). The median of PCT level in CAP group <60 yo was 1.42 ng/dLand in ≥60 yo was 0.65 ng/dL (p=0.207). The median of PCT level in HAP <60 yo was 8.32 ng/dL, where as in ≥60 yo was 9.93ng/dL (p=0.178). Based in this study can be concluded that the PCT level in HAP group was higher than in the CAP group. The PCTlevel in HAP with Gram negative bacterial infection was higher than in the CAP, where as in the CAP group was lower in ≥60 yo.

scholarly journals Comparison of causative microorganisms of posttraumatic endophthalmitis with and without retained intraocular foreign bodies

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yao Yang ◽  
Feng Mei ◽  
Jiaqi Lin ◽  
Jingyu Liao ◽  
Kaili Wu ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Foreign Bodies ◽  
Demographic Characteristics ◽  
Male Dominance ◽  
Microbial Pathogens ◽  
Gram Positive ◽  
Gram Negative ◽  
Bacillus Spp ◽  
Posttraumatic Endophthalmitis ◽  
Gram Positive Cocci

Abstract Background The goals of this work were to report the demographic characteristics of patients with clinically diagnosed endophthalmitis with or without intraocular foreign bodies (IOFBs) and to analyze the causative microorganisms. Methods A retrospective analysis was conducted on 1257 patients with clinically diagnosed posttraumatic endophthalmitis who were admitted to Zhongshan Ophthalmic Center between January 1, 2013, and August 31, 2020. Results Of the 1257 patients with clinically diagnosed posttraumatic endophthalmitis, 452 (36.0%) patients had IOFBs. Male dominance was more common among the patients with IOFBs than the patients without IOFBs. The average age of the patients with IOFBs was older than that of the patients without IOFBs. The most common microbial pathogens in these two groups were Gram-positive cocci and Gram-negative bacilli. Gram-positive bacilli were more common in the patients with IOFBs than in those without IOFBs (17.9 vs. 9.4%), and Bacillus spp. accounted for 12.6 and 5.5%, respectively. Fungi were less abundant in the patients with IOFBs than in those without IOFBs (8.0 vs. 15.6%). Conclusions Patients with IOFBs were mostly male and older than those without IOFBs. Gram-positive bacilli were more common and fungi were less common in patients with IOFBs than in those without IOFBs.

Microanatomy of the Periplasm of Bacillus Licheniformis

1971 ◽  
Vol 29 ◽  
pp. 262-263
Author(s):  
B.K. Ghosh
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Bacillus Licheniformis ◽  
External Environment ◽  
Permeability Barrier ◽  
Periplasmic Space ◽  
Modified Technique ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

Periplasm of bacteria is the space outside the permeability barrier of plasma membrane but enclosed by the cell wall. The contents of this special milieu exterior could be regulated by the plasma membrane from the internal, and by the cell wall from the external environment of the cell. Unlike the gram-negative organism, the presence of this space in gram-positive bacteria is still controversial because it cannot be clearly demonstrated. We have shown the importance of some periplasmic bodies in the secretion of penicillinase from Bacillus licheniformis.In negatively stained specimens prepared by a modified technique (Figs. 1 and 2), periplasmic space (PS) contained two kinds of structures: (i) fibrils (F, 100 Å) running perpendicular to the cell wall from the protoplast and (ii) an array of vesicles of various sizes (V), which seem to have evaginated from the protoplast.

Rapid demonstration of septic or infectious arthritis due to Gram-negative bacteria

1992 ◽  
Vol 50 (1) ◽  
pp. 686-687
Author(s):  
Jacob S. Hanker ◽  
Paul R. Gross ◽  
Beverly L. Giammara
Keyword(s):  
Chronic Arthritis ◽  
Blood Cultures ◽  
Gram Negative Bacteria ◽  
Infectious Arthritis ◽  
Bacterial Arthritis ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria

Blood cultures are positive in approximately only 50 per cent of the patients with nongonococcal bacterial infectious arthritis and about 20 per cent of those with gonococcal arthritis. But the concept that gram-negative bacteria could be involved even in chronic arthritis is well-supported. Gram stains are more definitive in staphylococcal arthritis caused by gram-positive bacteria than in bacterial arthritis due to gram-negative bacteria. In the latter situation where gram-negative bacilli are the problem, Gram stains are helpful for 50% of the patients; they are only helpful for 25% of the patients, however, where gram-negative gonococci are the problem. In arthritis due to gram-positive Staphylococci. Gramstained smears are positive for 75% of the patients.

In-vitro Antioxidant and Antibacterial Activity of Methanolic Extract of Shorea robusta Gaertn. F. Resin

2016 ◽  
Vol 6 (4) ◽  
pp. 68
Author(s):  
Sushma Vashisht ◽  
Manish Pal Singh ◽  
Viney Chawla
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Disc Diffusion ◽  
Gram Positive ◽  
Gram Negative ◽  
Shorea Robusta ◽  
Dose Dependent ◽  
Resin Extract

The methanolic extract of the resin of Shorea robusta was subjected to investigate its antioxidant and antibacterial properties its utility in free radical mediated diseases including diabetic, cardiovascular, cancer etc. The methanol extract of the resin was tested for antioxidant activity using scavenging activity of DPPH (1,1-diphenyl-2-picrylhydrazil) radical method, reducing power by FeCl3 and antibacterial activity against gram positive and gram negative bacteria using disc diffusion method. The phytochemical screening considered the presence of triterpenoids, tannins and flavoniods. Overall, the plant extract is a source of natural antioxidants which might be helpful in preventing the progress of various oxidative stress mediated diseases including aging. The half inhibition concentration (IC50) of resin extract of Shorea robusta and ascorbic acid were 35.60 µg/ml and 31.91 µg/ml respectively. The resin extract exhibit a significant dose dependent inhibition of DPPH activity. Antibacterial activity was observed against gram positive and gram negative bacteria in dose dependent manner.Key Words: Shorea robusta, antioxidant, antibacterial, Disc-diffusion, DPPH.

Antibacterial activity of magnesium oxide nanoparticles prepared by Calcination method

2019 ◽  
Vol 10 (03) ◽  
Author(s):  
Elaf Ayad Kadhem ◽  
Miaad Hamzah Zghair ◽  
Sarah , Hussam H. Tizkam, Shoeb Alahmad Salih Mahdi ◽  
Hussam H. Tizkam ◽  
Shoeb Alahmad
Keyword(s):  
Antibacterial Activity ◽  
Magnesium Oxide ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Magnesium Oxide Nanoparticles ◽  
Agar Disc

magnesium oxide nanoparticles (MgO NPs) were prepared by simple wet chemical method using different calcination temperatures. The prepared NPs were characterized by Electrostatic Discharge (ESD), Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD). It demonstrates sharp intensive peak with the increase of crystallinty and increase of the size with varying morphologies with respect to increase of calcination temperature. Antibacterial studies were done on gram negative bacteria (E.coli) and gram positive bacteria (S.aureus) by agar disc diffusion method. The zones of inhibitions were found larger for gram positive bacteria than gram negative bacteria, this mean, antibacterial MgO NPs activity more active on gram positive bacteria than gram negative bacteria because of the structural differences. It was found that antibacterial activity of MgO NPs was found it has directly proportional with their concentration.

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