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Polish Journal of Microbiology

Polish Society of Microbiologists

Subject: Microbiology

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ISSN: 1733-1331
eISSN: 2544-4646

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FEATURED ARTICLES

Comparison of PCR, Fluorescent in Situ Hybridization and Blood Cultures for Detection of Bacteremia in Children and Adolescents During Antibiotic Therapy
Epilithic Biofilms in Lake Baikal: Screening and Diversity of PKS and NRPS Genes in the Genomes of Heterotrophic Bacteria
Functional and Transcriptomic Characterization of a Dye-decolorizing Fungus from Taxus Rhizosphere

VOLUME 67 , ISSUE 3 (September 2018) - List of articles

Are Probiotic Really Safe for Humans?

ANNA ZAWISTOWSKA-ROJEK/ STEFAN TYSKI

Probiotic bacteria have been used as a health-promoting factor for a very long time. Nowadays, products containing probiotic bacteria are becoming more and more popular on the market. The term probiotics refers to the products belonging to the following groups: probiotic drugs (medicinal products – live biotherapeutic products for human use), medical devices, probiotic foods (e.g. foods, food ingredients, dietary supplements or food for special medical purposes), directly fed microorganisms (for(..)

DOI: 10.21307/pjm-2018-044

Published Online: 04-September-2018

Secondary Metabolites of Actinomycetes and their Antibacterial, Antifungal and Antiviral Properties

KATARZYNA JAKUBIEC-KRZESNIAK/ ALEKSANDRA RAJNISZ-MATEUSIAK/ ADAM GUSPIEL/ JOANNA ZIEMSKA/ JOLANTA SOLECKA

The growing resistance of microorganisms towards antibiotics has become a serious global problem. Therapeutics with novel chemical scaffolds and/or mechanisms of action are urgently needed to combat infections caused by multidrug resistant pathogens, including bacteria, fungi and viruses. Development of novel antimicrobial agents is still highly dependent on the discovery of new natural products. At present, most antimicrobial drugs used in medicine are of natural origin. Among the natural produ(..)

DOI: 10.21307/pjm-2018-048

Published Online: 04-September-2018

Exopolysaccharides Produced by Lactobacillus rhamnosus KL 53A and Lactobacillus casei Fyos Affect Their Adhesion to Enterocytes

CORINNA KONIECZNA/ MICHAŁ SŁODZIŃSKI/ MARCIN T. SCHMIDT

Probiotics promote and help to maintain beneficial microbiota composition of the gastrointestinal tract ecosystem and have a positive impact on the host’s health. Production of exopolysaccharides is an important feature of probiotic lactobacilli. It increases the chance of their survival in the gastrointestinal tract and promotes adhesion to the epithelium; therefore, exopolysaccharides are important for the process of colonization. Two lactic acid bacteria strains were used in this study: Lacto(..)

DOI: 10.21307/pjm-2018-032

Published Online: 04-September-2018

Biohydrogen Production by Antarctic Psychrotolerant Klebsiella sp. ABZ11

ABDULLAHI MOHAMMED/ MOHD FIRDAUS ABDUL-WAHAB/ MAZLAN HASHIM/ ABDUL HAFIDZ OMAR/ MOHD NADZRI MD REBA/ MOHD FARID MUHAMAD SAID/ KAMARUZAMAN SOEED/ SITI AISYAH ALIAS/ JERZY SMYKLA/ MUSTAPHA ABBA/ ZAHARAH IBRAHIM

Lower temperature biohydrogen production has always been attractive, due to the lower energy requirements. However, the slow metabolic rate of psychrotolerant biohydrogen-producing bacteria is a common problem that affects their biohydrogen yield. This study reports on the improved substrate synthesis and biohydrogen productivity by the psychrotolerant Klebsiella sp. strain ABZ11, isolated from Antarctic seawater sample. The isolate was screened for biohydrogen production at 30°C, under facultat(..)

DOI: 10.21307/pjm-2018-033

Published Online: 04-September-2018

Evaluation of Modified Hodge Test as a Non-molecular Assay for Accurate Detection of KPC-producing Klebsiella pneumoniae

ATOSSA GHASEMNEJAD/ MONIR DOUDI/ NOUR AMIRMOZAFARI

Klebsiella pneumoniae carbapenemase (KPC) have become a major therapeutic challenge because of its increasingly fast dissemination throughout the world. Accurate detection of KPC is essential for optimal treatment. The Clinical and Laboratory Standards Institutes (CLSI) for fast detection of KPC producers currently recommend Modified Hodge Test (MHT) and Carba NP test. MHT can directly detect carbapenemase production in Enterobacteriaceae isolates. The current study was conducted to evaluate the(..)

DOI: 10.21307/pjm-2018-034

Published Online: 04-September-2018

Optimization of Mixed Solid-state Fermentation of Soybean Meal by Lactobacillus Species and Clostridium butyricum

LI-WEN SU/ YEONG-HSIANG CHENG/ FELIX SHIH-HSIANG HSIAO/ JIN-CHENG HAN/ YU-HSIANG YU

Soybean meal is the main vegetable protein source in animal feed. Soybean meal contains several anti-nutritional factors, which directly affect digestion and absorption of soy protein, thereby reducing growth performance and value in animals. Fermented soybean meal is rich in probiotics and functional metabolites, which facilitates soybean protein digestion, absorption and utilization in piglets. However, the mixed solid-state fermentation (SSF) conditions of soybean meal remain to be optimized.(..)

DOI: 10.21307/pjm-2018-035

Published Online: 04-September-2018

Broad Prebiotic Potential of Non-starch Polysaccharides from Oats (Avena sativa L.): an in vitro Study

VANDA SARGAUTIENE/ ILVA NAKURTE/ VIZMA NIKOLAJEVA

Prebiotics inducing the growth or activity of beneficial intestinal bacteria – probiotics producing short-chain fatty acids (SCFA) have lately received wide recognition for their beneficial influence on host intestinal microbiota and metabolic health. Some non-starch polysaccharides (NSP) are defined as prebiotics and oats being one of richest sources of NSP in grains are considered as potentially having prebiotic effect. However, information on fermentation of specific NSP of oats is limited. M(..)

DOI: 10.21307/pjm-2018-036

Published Online: 04-September-2018

The Effect of Silver Nanoparticles on Listeria monocytogenes PCM2191 Peptidoglycan Metabolism and Cell Permeability

KATARZYNA MARKOWSKA/ ANNA MARIA GRUDNIAK/ BARBARA MILCZAREK/ KRYSTYNA IZABELLA WOLSKA

Listeria monocytogenes is Gram-positive bacterial pathogen, a causative agent of food poisoning and systemic disease – listeriosis. This species is still susceptible to several conventionally used antibiotics but an increase in its resistance has been reported. For this reason the search for new, alternative therapies is an urgent task. Silver nanoparticles seem to be the promising antibacterial agent. Minimal inhibitory concentration of silver nanoparticles was determined. Sublethal concentrati(..)

DOI: 10.21307/pjm-2018-037

Published Online: 04-September-2018

Isolation of Bacterial Endophytes from Phalaris arundinacea and their Potential in Diclofenac and Sulfamethoxazole Degradation

ANNA WĘGRZYN/ EWA FELIS

Diclofenac (DCF), a non-steroidal anti-inflammatory drug (NSAID) and sulfamethoxazole (SMX), an antimicrobial agent, are in common use and can be often detected in the environment. The constructed wetland systems (CWs) are one of the technologies to remove them from the aquatic environment. The final effect of the treatment processes depends on many factors, including the interaction between plants and the plant-associated microorganisms present in the system. Bacteria living inside the plant as(..)

DOI: 10.21307/pjm-2018-039

Published Online: 04-September-2018

Carbapenem-resistant Acinetobacter baumannii from Air and Patients of Intensive Care Units

MEIJIE JIANG/ YUNQING MU/ NING LI/ ZHIJUN ZHANG/ SHULIN HAN

To understand the molecular epidemiology and antibiotic resistance of air and clinical isolates of Acinetobacter baumannii, the intensive care unit settings of a hospital in Northern China were surveyed in 2014. Twenty non-duplicate A. baumannii isolates were obtained from patients and five isolates of airborne A. baumannii were obtained from the wards’ corridors. Pulsed field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) were used to analyze the homology relationships of isol(..)

DOI: 10.21307/pjm-2018-040

Published Online: 04-September-2018

Bacterial Microbiota and Fatty Acids in the Faeces of Overweight and Obese Children

RENATA BARCZYŃSKA/ MIECZYSŁAW LITWIN/ KATARZYNA SLIŻEWSKA/ MIECZYSLAW SZALECKI/ AGNIESZKA BERDOWSKA/ KATARZYNA BANDURSKA/ ZDZISŁAWA LIBUDZISZ/ JANUSZ KAPUŚNIAK

The growing number of children with overweight and obesity constitutes a major health problem of the modern world and it has been suggested that intestinal microbiota may influence energy intake from food. The objectives of this study were to determine quantity and proportions of dominant genera of Bacteroides, Prevotella (phylum Bacteroidetes); Clostridium, Lactobacillus (phylum Firmicutes) and Bifidobacterium (phylum Actinobacteria) in the intestines and to determine the content of short-chain(..)

DOI: 10.21307/pjm-2018-041

Published Online: 04-September-2018

RNA Quality Control Using External Standard RNA

TAKEMA HASEGAWA/ JUNKO TAKAHASHI/ HITOSHI IWAHASHI

In this paper, we propose a new evaluation method using external standard RNA for quality control of the extracted RNA. RNA Integrity Number and UV absorption are generally used as a basis for RNA quality control; however, these methods do not always reflect the quality of mRNA. While standard RNA is supposedly designed on the basis of mRNA, it has the potential to be used to evaluate the quality of the mRNA. In this study, we took into consideration the three essential factors, viz., yield of m(..)

DOI: 10.21307/pjm-2018-042

Published Online: 04-September-2018

Improved Production of Recombinant Human β-NGF in Escherichia coli – a Bioreactor Scale Study

ZAHRA HAJIHASSAN/ POURIA GHOLAMI TILKO/ SEYEDEH MAHDIEH SADAT

Human nerve growth factor β (β-NGF) is considered a major therapeutic agent for treatment of neurodegenerative diseases. We have previously reported the optimized conditions for β-NGF overproduction in Escherichia coli in a shake-flask culture. In this study the optimal %DO (dissolved oxygen) and post induction temperature values for improved production of β-NGF were found in the bioreactor scale using response surface methodology (RSM) as the most common statistical method. Also, for further en(..)

DOI: 10.21307/pjm-2018-045

Published Online: 04-September-2018

The Emergence of Different Functionally Equivalent PAH Degrading Microbial Communities from a Single Soil in Liquid PAH Enrichment Cultures and Soil Microcosms Receiving PAHs with and without Bioaugmentation

FRANCINE AMARAL PIUBELI/ LIGIA GIBBI DOS SANTOS/ EMILIA NARANJO FERNÁNDEZ/ FLÁVIO HENRIQUE DA SILVA/ LUCIA REGINA DURRANT/ MATTHEW JAMES GROSSMAN

Polycyclic aromatic hydrocarbon (PAHs) are common soil contaminants of concern due to their toxicity toward plants, animals and microorganisms. The use of indigenous or added microbes (bioaugmentation) is commonly used for bioremediation of PAHs. In this work, the biodegradation rates and changes in the bacterial community structure were evaluated. The enrichment culture was useful for unambiguously identifying members of the soil bacterial community associated with PAH degradation and yielded a(..)

DOI: 10.21307/pjm-2018-046

Published Online: 04-September-2018

Biochemical and Molecular Characterization of a Native Haloalkalophilic Tolerant Strain from the Texcoco Lake

MARISELA YADIRA SOTO-PADILLA/ PABLO GORTÁRES-MOROYOQUI/ LUIS ALBERTO CIRA-CHÁVEZ/ MARÍA ISABEL ESTRADA-ALVARADO

In the last decade several new genera have been isolated in alkaline and halophile growth conditions. The studies conducted in the Texcoco Lake soils have shown a generalized microbial adaptation to the specific conditions. In this research work, morphological and phylogenetic characterization of the HN31(22) strain that was isolated from the cited soil is presented. The strain was identified as a Gram-positive halophile and alkaline tolerant bacteria from the Nesterenkonia genus, which uses dif(..)

DOI: 10.21307/pjm-2018-047

Published Online: 04-September-2018

Gut Microbial Compositions in Four Age Groups of Tibetan Minipigs

XIA JIANG/ BANGZHU CHEN/ DONGSHU GU/ ZUHUA RONG/ XIAOHUA SU/ MIN YUE/ HONGWEI ZHOU/ WEIWANG GU

In this study, the gut microbiota was characterized in four age strata of Tibetan minipigs. Results indicated that the fecal bacteria of 7-, 28-, 56-, and 180-day-old minipigs did not significantly differ in terms of phylogenetic diversity (i.e., PD whole tree) or the Shannon index (both, p > 0.05). Findings of a principal coordinate analysis demonstrated that fecal bacteria of 180-day-old minipigs were discernable from those of the other three age groups. From ages seven to 56 days, the abundan(..)

DOI: 10.21307/pjm-2018-038

Published Online: 04-September-2018

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