Topics

Bacteriocin production and distribution of bacteriocin-encoding genes in enterococci from dogs.

07:00 EST 30th November 2019 | BioPortfolio

Summary of "Bacteriocin production and distribution of bacteriocin-encoding genes in enterococci from dogs."

One of the relatively widespread properties of many enterococcal strains is the production of bacteriocins, which could be useful as natural food preservatives inhibiting pathogenic and spoilage microorganisms. However, knowledge of the distribution and spectrum of bacteriocin activity as well as the distribution of bacteriocin-encoding genes in enterococci isolated from dogs is scarce. For this reason we subjected 160 enterococcal isolates (E. faecium n=92, E. faecalis n=35, E. hirae n=28, E. casseliflavus n=3, E. mundtii n=2) from 105 samples of dog faeces to PCR detection of genes for enterocin A, P, B, L50A, L50B, AS-48, bac31 and to screening for bacteriocin activity. The results showed the presence of at least one of the tested genes in 54/160 isolates, whereby E. faecium was the most frequently gene-possessing species. The most frequently occurring gene for production of enterocin A was observed in combination with enterocin P and B. Bacteriocin activity was observed in 76/160 isolates against at least one out of five used indicator bacteria from the genus Listeria, Enterococcus, Streptococcus and Staphylococcus. Four selected strains (IK25, Bri, I/Dz, P10) were active mostly against different species of Enterococcus sp. (in the range 400-25600 AU/mL) and Listeria sp. (800-12800 AU/mL) but no Gram-negative bacteria were inhibited. The protein character, thermostability (up to 121°C) and stability at different pH values (3.0 - 10.0) were confirmed for crude bacteriocins of these four strains. Molecular weight detection together with the presence of genes identified the antimicrobial substance of E. faecium IK25 strain as enterocin B.

Affiliation

Journal Details

This article was published in the following journal.

Name: International journal of antimicrobial agents
ISSN: 1872-7913
Pages:

Links

DeepDyve research library

PubMed Articles [16003 Associated PubMed Articles listed on BioPortfolio]

The cost and benefit of quorum sensing controlled bacteriocin production in Lactobacillus plantarum.

Bacteria eliminate competitors via 'chemical warfare' with bacteriocins. Some species appear to adjust bacteriocin production conditionally in response to the social environment. We tested whether var...

Bacteriocin of Pediococcus acidilactici HW01 Inhibits Biofilm Formation and Virulence Factor Production by Pseudomonas aeruginosa.

Pseudomonas aeruginosa is a potential source of food contamination that leads to food spoilage and infections as a result of the generation of biofilm and virulence factors. In the present study, we d...

Antibacterial immunomodulatory and antibiofilm triple effect of Salivaricin LHM against Pseudomonas aeruginosa urinary tract infection model.

The study sought to purify and characterize a novel bacteriocin from oral L. salivarius and studying the effect of L. salivarius and its bacteriocin against multidrug-resistant (MDR) P. aeruginosa in ...

Expression of coagulin A with low cytotoxic activity by Pediococcus pentosaceus ST65ACC isolated from raw milk cheese.

We aimed to evaluate some specific conditions for growth of Pediococcus pentosaceus ST65ACC and its bacteriocin expression through ABC transporters; to purify the bacteriocin and determine its sequenc...

PrfA activation in Listeria monocytogenes increases the sensitivity to class IIa bacteriocins despite impaired expression of the bacteriocin receptor.

The scope of the present work was to characterize the activity of class IIa bacteriocins in Listeria (L.) monocytogenes cells that constitutively express an activated form of PrfA, the virulence maste...

Clinical Trials [3485 Associated Clinical Trials listed on BioPortfolio]

Genetic Determinants of Warfarin Anticoagulation Effect

The response to warfarin varies greatly among individuals. Some of this variability can be ascribed to genetic polymorphisms in the gene encoding for CYP2C9, the enzyme mediating the metab...

Investigation of the Optimal Cocktailed Probiotics for Decolonization of Vancomycin-resistant Enterococci in Human Gut

Vancomycin-resistant enterococci (VRE) has been a serious public health issue as an opportunistic pathogen and reservoir of antibiotic resistant genes. To reduce VRE carriage in human gut,...

Study Evaluating Vancomycin-Resistant Enterococci in a Hematology Unit

To determine the impact of the restriction of the third and forth generation cephalosporins on the reduction of intestinal colonization or infection with vancomycin-resistant enterococci (...

A Phase II Study of the CDK4/6 Inhibitor Abemaciclib in Patients With Solid Tumors Harboring Genetic Alterations in Genes Encoding D-type Cyclins or Amplification of CDK4 or CDK6

This research study is studying a targeted therapy as a possible treatment for cancer abnormality in one of the following genes: CCND1, CCND2, CCND3, CDK4, or CDK6. The drug involved in t...

Thai Prophylactic Vaccine Study

The development of a safe and effective vaccine for HIV is the subject of intensive world-wide research. Various approaches are being investigated in monkey models and humans. This is a ra...

Medical and Biotech [MESH] Definitions

Plasmids encoding bacterial exotoxins (BACTERIOCINS).

Strains of the genus Enterococcus that are resistant to the antibiotic VANCOMYCIN. The enterococci become resistant by acquiring plasmids carrying genes for VANCOMYCIN RESISTANCE.

A species of Lactobacillus that occurs in fermented meat and fish. It produces the BACTERIOCIN Sakacin P and is used for FOOD PRESERVATION and as a PROBIOTIC.

A bacteriocin produced by a plasmid that can occur in several bacterial strains. It is a basic protein of molecular weight 56,000 and exists in a complex with its immunity protein which protects the host bacterium from its effects.

Procedures for identifying types and strains of bacteria. The most frequently employed typing systems are BACTERIOPHAGE TYPING and SEROTYPING as well as bacteriocin typing and biotyping.

Quick Search


DeepDyve research library

Relevant Topics

Food
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism ...

Polymerase Chain Reaction (PCR)
PCR (Polymerase Chain Reaction) uses the ability of DNA polymerase (enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two ident...


Searches Linking to this Article