All posts by Postępy Mikrobiologii

Rys historyczny oraz aktualna taksonomia pałeczek z rodzaju Campylobacter

The history and the current taxonomy of Campylobacter species
P. Roszkowska, S. Giedrys-Kalemba, K. Galant, A. Pruss, I. Wojciechowska - Koszko

1. Rys historyczny. 2. Taksonomia. 3. Podsumowanie

The history and the current taxonomy of Campylobacter species

Abstract: The first mentions of unknown pathogenic Gram-negative curved rods date back to the 1880s. Initially, these bacteria were regarded only as a pathogen of animals, however, their clinical significance increased with the development of methods used in microbiological diagnostics. In recent decades, systematics and taxonomy of Campylobacter, initially belonging to the genus Vibrio, have undergone many transformations and modifications. Campylobacter is a separate genus since 1963 and, currently, it counts 27 species, 9 subspecies and 3 biovars. 19 species are considered to be pathogenic for humans and 9 for the animals. Nowadays, the significance of Campylobacter in the pathogenesis of infections in humans and animals is unquestionable.

1. Historical background. 2. Taxonomy. 3. Summary

Klasyczne bakterie propionowe – taksonomia,warunki hodowlane oraz zastosowanie

Dairy propionibacteria – taxonomy,culture conditions and application
J. Pawlicka-Kaczorowska, K. Czaczyk

1. Wstęp. 2. Ogólna charakterystyka klasycznych bakterii propionowych. 2.1. Taksonomia. 2.2. Ekologia. 2.3. Morfologia i metabolizm. 2.4. Wymagania hodowlane. 3. Zastosowanie klasycznych bakterii propionowych. 3.1. Przemysłowe wykorzystanie i kierunki badań. 3.2. Kwas propionowy. 3.2. Witaminy z grupy B. 3.3. Trehaloza. 3.4. Sprzężone dieny kwasu linolowego. 3.5. Czynniki bifidogenne. 3.6. Kwas 5-aminolewulinowy. 3.7. Bakteriocyny. 3.8. Właściwości przeciwdrobnoustrojowe. 3.9. Właściwości probiotyczne. 4. Podsumowanie

Dairy propionibacteria – taxonomy, culture conditions and application

Abstract: The objective of this review paper was to present the current state of knowledge about dairy propionibacteria and demonstrate their potential application in industry. Propionibacteria are Gram-positive, non-spore-forming, non-motile, facultative anaerobic, pleomorphic rods – belonging to the genus Propionibacterium. Traditionally, they are used as starters in the manufacture of Swiss-type cheeses. These bacteria produce an interestingly wide range of bioactive compounds, like B group vitamins, trehalose, conjugated linoleic acid, propionic acid, bacteriocins, bifidogenic factors. Furthermore, they are able to improve the health of humans and animals by modulation of gut microbiota, regulation of the immune system, induction of colorectal carcinoma cells apoptosis or alleviation of lactose intolerance. Due to documented probiotic properties and the ability to synthesize functional biomolecules, a growing number of studies focuses on dairy propionibacteria and their utilization as a microbial bioresource.

1. Introduction. 2. General characteristics of dairy propionibacteria. 2.1. Taxonomy. 2.2. Ecology. 2.3. Morphology and metabolism. 2.4. Growth requirements. 3. Application of dairy propionibacteria. 3.1. Industrial applications and research directions. 3.2. Propionic acid. 3.2. B group vitamins. 3.3. Trehalose. 3.4. Conjugated linoleic acid. 3.5. Bifidogenic factors. 3.6. 5-aminolevulinic acid. 3.7. Bacteriocins. 3.8. Antimicrobial properties. 3.9. Probiotic properties. 4. Summary

Biosorpcja jonów kadmu przez struktury powierzchniowe bakterii z rodzaju Lactobacillus

Biosorption of cadmium ions by cell surface structures of bacteria from Lactobacillus species
M. Michalak, K. Gustaw, A. Waśko, M. Polak-Berecka

1. Wprowadzenie. 2. Zanieczyszczenie środowiska kadmem a zdrowie człowieka. 3. Bakterie z rodzaju Lactobacillus jako biosorbent jonów metali ciężkich. 4. Rola zewnętrznych struktur komórkowych w wiązaniu jonów metali ciężkich. 4.1. Biosorpcja jonów metali ciężkich przez białka powierzchniowe. 4.2. Udział polisacharydów w wiązaniu jonów metali ciężkich. 5. Czynniki wpływające na wydajność procesu biosorpcji. 6. Kinetyka procesu biosorpcji. 7. Podsumowanie

Biosorption of cadmium ions by cell surface structures of bacteria from Lactobacillus species

Abstract: Cadmium is a heavy metal which is one of the major polluting component of human and animal environment. Exposure can lead to accumulation of metal ions in the tissues, causing adverse health effects. In recent years, the ability of biological material, such as bacteria, to remove cadmium and other toxic metals have been explored. Biosorption is a process of rapid binding of metals from solution onto functional groups that occur on the surface of bacterial cells. Species such as Lactobacillus, present in the human gastrointestinal tract and in fermented food, have the ability to bind and detoxify heavy metal ions due to the occurrence of negatively charged functional groups. These bacteria offer several advantages compared to other microorganisms, primarily thanks to their probiotic activity and GRAS (Generally Recognized As Safe) status. In this review, our intention was to describe the current understanding of biosorption mechanism of lactobacilli and to explain how bacterial surface structures interact with metal ions.

1. Introduction. 2. Environmental pollution by cadmium and human health. 3. Bacteria from Lactobacillus species as biosorbent of heavy metal ions. 4. Role of extracellular structures in the binding of heavy metal ions. 4.1. Biosorption of heavy metal ions by surface proteins. 4.2. Impact of exopolysaccharides on the binding of heavy metal ions. 5. Factors affecting efficiency of biosorption process. 6. Kinetic studies of biosorption process. 7. Summary

Bakterie kwasu octowego Asaia sp. i ich unikalne zdolności adaptacyjne

Acetic acid bacteria Asaia sp. and their unique adaptive abilities
H. Antolak, D. Kręgiel

1. Charakterystyka Asaia sp. 2. Zdolności adaptacyjne. 3. Zakażenia oportunistyczne. 4. Symbionta moskitów i walka z malarią. 5. Podsumowanie

Abstract: The natural environment for acetic bacteria of the genus Asaia are Asian fruits, flowers and insects. They are also isolated from spoiled soft drinks in Europe. These bacteria are classified as saprophytes, but there have been some cases of bacteremia caused by Asaia lannensis and A. bogorensis strains. They are also isolated as microbiota of mosquitoes in the tropical climate. Their unique adaptation abilities, such us genes encoding adhesins which help them colonize the environment as well as operons responsible for survival under various conditions, make Asaia sp. potential microorganisms to be used in the fight against malaria.

1. Characteristics of Asaia sp. 2. Adaptability. 3. Opportunistic infections. 4. Mosquito symbionts and the fight against malaria. 5. Summary

Integrony bakterii Gram-dodatnich

Integrons in Gram-positive bacteria
B. Łabiszak, R. Koczura

1. Wprowadzenie. 2. Charakterystyka integronów. 3. Integrony bakterii Gram-dodatnich. 3.1. Integrony Corynebacterium spp. 3.2. Integrony Enterococcus spp. 3.3. Integrony Staphylococcus spp. 3.4. Integrony Streptococcus spp. 3.5. Integrony innych gatunków bakterii Gram-dodatnich. 4. Podsumowanie

Abstract: Integrons are genetic platforms responsible for integration, rearrangement and expression of resistance determinants called gene cassettes. Most of the reports on the occurrence, characteristics and evolution of integrons concern Gram-negative bacteria, whereas relatively little is known on the distribution and role of integrons in Gram-positive microorganisms. The aim of this review is to summarize the information about the occurrence of integrons in Gram-positive bacteria and their role in the spread of antimicrobial resistance.

1. Introduction. 2. Integron characteristics. 3. Integrons in Gram-positive bacteria. 3.1. Integrons in Corynebacterium spp. 3.2. Integrons in Enterococcus spp. 3.3. Integrons in Staphylococcus spp. 3.4. Integrons in Streptococcus spp. 3.5. Integrons in other Gram-positive species. 4. Summary

POSTĘPY MIKROBIOLOGII 2021, Tom 60, Zeszyt 2

POSTĘPY MIKROBIOLOGII 2021, Tom 60, Zeszyt 2

POSTĘPY MIKROBIOLOGII
2021, Tom 60, Zeszyt 2

O Towarzystwie

PTM

Celem Polskiego Towarzystwa
Mikrobiologów jest propagowanie rozwoju nauk mikrobiologicznych

i popularyzowanie osiągnięć
mikrobiologii wśród członków Towarzystwa oraz szerokich kręgów społeczeństwa. Formami działalności jest organizowanie zjazdów, posiedzeń naukowych, kursów, wykładów
i odczytów oraz konkursów prac naukowych; wydawanie i popieranie wydawania czasopism naukowych, książek
i innych publikacji
z dziedziny mikrobiologii; opiniowanie o stanie i potrzebach mikrobiologii polskiej

i występowanie w jej sprawach wobec
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z pokrewnymi stowarzyszeniami
w kraju i za granicą.