type of BS was analyzed using Thin Layer Chromatography (TLC) and Fourier Transform Infrared Spectrometry (FTIR). Additionally, the antimicrobial activity was examined to investigate another potential use of BS as a therapeutic agent.
Materials and Methods
Effect of carbon sources on bacterial growth and the production of biosurfactant. These experiments were conducted to investigate the effects of different carbon sources on the growth and BS production of E. cloacae B14, whose
Polish Journal of Microbiology , ISSUE 3, 273–282
Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 3, 213–227
The scope of the experiments included analysis of the antimicrobial activity of ethanolic, methanolic and aqueous extracts against bacterial and fungal cultures and determination of the minimum inhibitory concentration of plant extracts tested microbial growth. Analysis of the antifungal and antibacterial activity was carried out by the disc diffusion method using paper discs. In the experiment 11 species of microorganisms – 8 bacterial and 3 fungal strains were used. The highest
Polish Journal of Microbiology , ISSUE 4, 463–472
The aim of this study was to investigate the capacity of Streptococcus suis strains to form biofilms and to evaluate the antimicrobial activity of Penicillin G and N-acetylcystein (NAC) on both S. suis sessile and planktonic forms. Only non-typeable isolates of S. suis were correlated with a greater biofilm formation capacity. The MCI of Penicillin G and NAC required for inhibiting biofilm growth were higher than the required concentration for inhibiting planktonic growth. The combinations of
Polish Journal of Microbiology , ISSUE 1, 105–109
active than activated PPP and the activation of coagulation is a fundamental step. Additionally, the antimicrobial activity of PRP and/or PPP seems not to be affected by periodontitis.
Reham L. Aggour,
Polish Journal of Microbiology , ISSUE 1, 31–37
JUSTYNA D. KOWALSKA,
Polish Journal of Microbiology , ISSUE 1, 5–18
. creber was also reported as among the lower producers of STC (Jurjevic et al. 2013).
Therefore, the lack of knowledge of this species recently assigned to section Versicolores has attracted our attention to more explore and study this species. In our research A. creber was assayed for its secondary metabolites diversity using UHPLC-MS/MS technique. Then, the antimicrobial activity of A. creber against some human pathogens and its ability to scavenge different free radicals, and to produce antioxidant
NOREDDINE KACEM CHAOUCHE,
MARIA ROSARIA CATANIA,
Polish Journal of Microbiology , ISSUE 3, 309–316
. Circular bacteriocins have broad antimicrobial activity spectrum, including many food spoilage bacteria and pathogens, such as Listeria, Staphylococcus and Clostridum spp. Circular bacteriocins permeabilize the membrane of sensitive bacteria, causing loss of ions and dissipation of the membrane potential, and finally cell death. Enterocin AS-48 was the first identified circular bacteriocin and is best characterized so far. Circular bacteriocins or bacteriocin-producing lactic acid bacteria have great
Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 4, 451–464
factors, and the type and properties of the microorganisms (Fig. 1) (Bayliss et al. 2012).
Factors influencing the effectiveness of decontamination using cold plasma. Based on Liao et al. 2017.
The aim of this review is to present the current knowledge on the antimicrobial activity of the plasma and to discuss the molecular mechanism of interactions between cold atmospheric plasma and various groups of microorganisms.
Effect of cold plasma on viruses
The cold plasma technology becomes a
Polish Journal of Microbiology , ISSUE 2, 153–164
During a screening of lactic acid bacteria producing bacteriocin from Cotija cheese, the strain QC38 was isolated. Based on the 16S rRNA gene nucleotide sequencing (516 pb accession no KJ210322) and phylogenetic analysis, the isolate was identified as Pediococcus acidilactici. Neutralized cell-free supernatant was tested for antimicrobial activity against 17 Gram-negative and Gram-positive pathogens. Growth inhibition was achieved against Listeria monocytogenes (supplier or indication or source
Aurea I. Morales-Estrada,
Enrico A. Ruiz,
Polish Journal of Microbiology , ISSUE 3, 279–285
MI HEE NOH,
SEOK BIN YANG,
SANG WOOK KANG,
KYU HWAN KWACK,
Polish Journal of Microbiology , ISSUE 2, 263–268
A collection of 206 Staphylococcus spp. isolates was investigated for their ability to produce compounds exhibiting antistaphylococcal activity. This group included Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus xylosus strains recovered from bovine mastitis (n = 158) and human skin wounds and soft tissues infections (n = 48). Production of substances with antimicrobial activity was observed in six strains. Five of them were recovered from bovine mastitis, and one was
JOHN J. CHUREY,
RANDY W. WOROBO,
Polish Journal of Microbiology , ISSUE 2, –
Five of thiourea derivatives were prepared using as a starting compound 3-(trifluoromethyl)aniline, 4-chloro-3-nitroaniline, 1,3-thiazol-2-amine, 2H-1,2,3-triazol-4-amine and commercial isothiocyanates. All compounds were evaluated in vitro for antimicrobial activity. Derivatives 2 and 3 showed the highest inhibition against Gram-positive cocci (standard and hospital strains). The observed MIC values were in the range of 0.5–8 μg/ml. The products effectively inhibited the formation of
Polish Journal of Microbiology , ISSUE 4, 451–460
Nowadays nanomaterials within the size of 1–100 nm in at least one dimension with the novel, size-related properties have attracted the attention of many researchers in the area of chemistry, physics, material sciences, medicine, microbiology, and biotechnology (Rai et al. 2009, 2015; Tran et al. 2013). Silver nanoparticles (AgNPs) are one of the most commonly used engineered nanoproducts known for their antimicrobial activity (Kim et al. 2007; Rai et al. 2009; Martinez-Gutierrez
Polish Journal of Microbiology , ISSUE 4, 515–525
The purpose of this study was to determine the antimicrobial activity and occurrence of bacteriocin structural genes in Enterococcus spp. isolated from different cheeses and also investigate some of their virulence factors. Enterococcus strains were isolated from 33 different cheeses. Enterococcus faecium (6 strains) and Enterococcus faecalis (5 strains) enterocin-producing strains were identified by 16S rDNA analyses. Structural genes entA, entB, entP and entX were detected in some isolates
Banu Özden Tuncer
Polish Journal of Microbiology , ISSUE 2, 223–233
of microbial infection. The AMP-17 gene has no functional annotation in GeneBank and is of unknown function. To further assess the antimicrobial activity of the protein encoded by this gene, the prediction tools of the Antimicrobial Peptide (APD) and Collection of Anti-Microbial Peptides (CAMP) databases were used (Wang et al. 2004; Thomas et al. 2010; Wang et al. 2016). The two databases used four different algorithms, support vector machines (SVM), random forest (RF), artificial neural networks
Polish Journal of Microbiology , ISSUE 3, 383–390
, β-lactam antibiotics, and aminoglycosides [9, 53, 78, 81, 85]. The overuse of antibiotics in treatment and in industry will only further increase resistance, and will thus render it impossible to treat infections caused by drug resistant bacteria. Therefore, it is necessary to reduce the consumption of antibiotics and look for alternative substances with antimicrobial activity, which are not antibiotics, like essential oils from plants.
Essential oils (EOs) are in fact not oils, but they are
Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 2, 177–190