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Postępy Mikrobiologii - Advancements of Microbiology

Polish Society of Microbiologists

Subject: Microbiology

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ISSN: 0079-4252
eISSN: 2545-3149

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FEATURED ARTICLES

VOLUME 58 , ISSUE 2 (May 2019) - List of articles

THE STRINGENT RESPONSE AND ITS INVOLVEMENT IN THE REACTIONS OF BACTERIAL CELLS TO STRESS

Julia Berdychowska/ Justyna Boniecka/ Grażyna B. Dąbrowska

Abstract The stringent response is a form of bacterial response to adverse environmental conditions. Its effectors are guanosine tetraphosphate and guanosine pentaphosphate [(p)ppGpp], which are synthetized by RelA, SpoT and their homologs (RSH). RelA, a (p)ppGpp synthase, is activated when there is a shortage of amino acids, whereas SpoT, which has the ability to synthetize and hydrolyze (p)ppGpp, responds to fatty acids, iron and carbon limits. Accumulation of (p)ppGpp causes an inhibition of (..)

DOI: 10.21307/PM-2019.58.2.127

DIFFUSELY ADHERING ESCHERICHIA COLI

Michał Turniak/ Beata Sobieszczańska

Abstract Diffusely adhering E. coli strains (DAEC) is one of the seven pathovars of pathogenic E. coli causing intestinal infections in humans. DAEC is a diverse group of strains producing fimbrial or afimbrial adhesins that are responsible for their pathogenicity specific diffuse adherence pattern for epithelial cells. DAEC isolates are detected not only in humans, but also in various groups of animals (dogs, calves, cattle, poultry, pigs). A large variation in the genes that encode the adhesin(..)

DOI: 10.21307/PM-2019.58.2.143

LYSSAVIRUS SPP. – RABIES VIRUSES AS A STILL-PRESENT PROBLEM

Przemysław Gałązka/ Patryk Kaczor/ Klaudyna Grzelakowska/ Kamil Leis

Abstract The genus Lyssavirus spp. currently includes 14 species that are responsible for causing rabies, rabies-like and rabies-related diseases. The first symptoms of infection are similar to a cold and mainly include fever, headache and general fatigue. Then comes brain dysfunction and acute neurological symptoms, and ultimately – in most cases – death. Lyssaviruses are spread mainly through direct contact with the carrier that contains the viral reservoir. The gold standard in diagnostics is(..)

DOI: 10.21307/PM-2019.58.2.153

THE PREVALENCE OF SYMPTOMATIC DERMATOPHYTOSES IN DOGS AND CATS AND THE PATHOMECHANISM OF DERMATOPHYTE INFECTIONS

Dominik Łagowski/ Sebastian Gnat/ Aneta Nowakiewicz/ Marcelina Osińska/ Przemysław Zięba

Abstract Dermatophytoses are skin diseases related to the infection of surface layers of skin and other keratinised structures such as hair and nails, caused by fungi referred to as dermatophytes. The scientific literature provides descriptions of over 50 dermatophytic species classified in the Trichophyton, Epidermophyton, Nannizzia, Arthroderma, Lophophyton, and Paraphyton genera. Dermatophytes are regarded as pathogens; they are not a component of skin microbiota and their occurrence in anima(..)

DOI: 10.21307/PM-2019.58.2.165

ANTIBACTERIAL EFFECT OF NATURAL OILS – AN OPPORTUNITY TO SOLVE THE PROBLEM OF ANTIBIOTIC RESISTANCE ON THE EXAMPLE OF PSEUDOMONAS SPP.

Katarzyna Leja/ Kamila Szudera-Kończal/ Kamila Myszka/ Katarzyna Czaczyk

Abstract Presently, the overuse of antibiotics is a great problem all over the world. The reason for this phenomenon is both primary and secondary resistance. Primary resistance is a congenital feature of microbes and does not depend on its contact with a drug. It is chromosomally coded and cannot be transmitted to other species of bacteria. Secondary resistance, on the other hand, develops as a result of contact with the antibiotic substance. Genes located in plasmids are responsible for the fo(..)

DOI: 10.21307/PM-2019.58.2.177

EXOPOLYSACCHARIDE-PRODUCING LACTIC ACID BACTERIA – HEALTH-PROMOTING PROPERTIES AND APPLICATION IN THE DAIRY INDUSTRY

Anna M. Berthold-Pluta/ Antoni St. Pluta/ Monika Garbowska/ Lidia Stasiak-Różańska

Abstract Exopolysaccharides (EPS) are one of the classes of extracellular biopolymers synthesized by bacteria. Some strains of lactic acid bacteria (LAB) used in the dairy industry are able to synthesize EPS (EPS(+) strains). EPS may be secreted by a cell in the form of capsule or slime. Our review describes the factors influencing the activity of EPS production by LAB, the impact of the use of EPS(+) strains on the quality of fermented milk products (yoghurt, cheeses, etc.) and pro-health prope(..)

DOI: 10.21307/PM-2019.58.2.191

QUALITY ASSURANCE IN THE MEDICAL MICROBIOLOGY LABORATORY

Ewa Młodzińska/ Waleria Hryniewicz

Abstract In each laboratory, a quality assurance program should be developed in order to obtain reliable results and to fulfil the requirements of quality standards in the field of microbiological laboratory tests. Microbiological diagnostics makes it possible to determine the etiological agent of infection and allow the selection of an appropriate therapy. The quality of test results are affected by pre-laboratory, laboratory and post-laboratory steps, which should be checked regularly. Constan(..)

DOI: 10.21307/PM-2019.58.2.205

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