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Mini Review

Are Probiotic Really Safe for Humans?

(for animal use) and designer probiotics (genetically modified probiotics). Safety assessment of bacterial strains used as probiotics should be carefully studied. Even though probiotic bacteria have the generally recognized as safe (GRAS status), there are several reports about side effects triggered by the presence of these organisms. Microorganisms used as probiotics may cause systemic infections, stimulate the immune system, disturb metabolism and participate in horizontal gene transfer.

ANNA ZAWISTOWSKA-ROJEK, STEFAN TYSKI

Polish Journal of Microbiology , ISSUE 3, 251–258

research-article

Active and inactive forms of biotin synthase occur in Heterodera glycines

secreted proteins are closely related to bacterial proteins, suggesting that they have been acquired from bacteria through horizontal gene transfer events (HGTs) (Smant et al., 1998; Lambert et al., 1999; Davis et al., 2000; Bird et al., 2003; Bekal et al., 2015). While these studies focusing on secreted proteins and HGT candidates have been productive for understanding the molecular basis of nematode-host interactions, non-secreted proteins, enzymes, and metabolites have been overlooked; hence

Khee Man Kwon, Sadia Bekal, Leslie L. Domier, Kris N. Lambert

Journal of Nematology , 1–12

Research Article

TAXONOMY, VIRULENCE AND LIFE CYCLES OF BACILLUS CEREUS SENSU LATO

Bacillus cereus sensu lato is a group of several species of Gram-positive sporeformers ubiquitous in nature and showing huge impact on human activities. They are often found in soil, air, plant material, animal tissues and digestive tracts as well as in food products. Their genetic similarities and frequent horizontal gene transfer causes doubts regarding their taxonomy. In addition, their toxicity and psychrotolerance constitute serious problems in the dairy industry, being responsible for

Marek Bartoszewicz, Urszula Czyżewska

Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 4, 440–450

Research Article

SECRETION OF OUTER MEMBRANE VESICLES AS A MECHANISM PROMOTING H. PYLORI INFECTIONS

structural function, is extracellular DNA (eDNA) anchored to the surface of these organelles. eDNA associated with OMV additionally determines the genetic recombination in the process of horizontal gene transfer. H. pylori is naturally competent for genetic transformation and is constantly capable of DNA uptake from the environment. The natural competence state promotes the assimilation of eDNA anchored to the OMV surface. This is probably dependent on ComB and ComEC components, which are involved in the

Paweł Krzyżek

Postępy Mikrobiologii - Advancements of Microbiology , ISSUE 3, 316–325

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