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1. Assessment of Efficacy of BLIS-Producing Probiotic K12 for the Prevention of Group A Streptococcus Pharyngitis: a Short Communication

Author:
Di Pierro, Francesco
Source:
Probiotics and antimicrobial proteins 2019 v.11 no.1 pp. 332-334
ISSN:
1867-1306
Subject:
Streptococcus salivarius,   etc   ; antibiotics; pharyngitis; probiotics; schools;     Show all 5 Subjects
Abstract:
... The neutral outcome of the recently reported school-based trial of probiotic K12 (The effect of the oral probiotic Streptococcus salivarius K12 on group A streptococcus pharyngitis: a pragmatic trial in schools) can be attributed at least partially to several readily identifiable confounding factors. Mainly, the execution and outcome were negatively impacted by (a) the suboptimal efficacy and freq ...
DOI:
10.1007/s12602-018-9398-7

2. Inhibition of Streptococcus mutans and S. sobrinus biofilms by liamocins from Aureobasidium pullulans

Author:
Leathers, Timothy D.; Rich, Joseph O.; Bischoff, Kenneth M.; Skory, Christopher D.; Nunnally, Melinda S.
Source:
Biotechnology reports 2019 v.21 pp. e00300
ISSN:
2215-017X
Subject:
Streptococcus mutans; Streptococcus sobrinus,   etc   ; Aureobasidium pullulans; adhesion; biofilm; biotechnology; lids; microorganisms; plankton;     Show all 9 Subjects
Abstract:
... The aim of this study was to determine if the novel anti-streptococcal inhibitors, liamocins, also inhibit biofilm formation by S. mutans and S. sobrinus. S. mutans strain ATCC 25175 and S. sobrinus strain ATCC 33478 were tested for biofilm formation in a rapid microtiter plate (MTP) assay and the effects of added liamocins were determined. This assay measures relative biofilm growth on pin lids. ...
DOI:
10.1016/j.btre.2018.e00300

3. Probiotic fermented sheep’s milk containing Lactobacillus casei 01: Effects on enamel mineral loss and Streptococcus counts in a dental biofilm model

Author:
Nadelman, Patricia; Monteiro, Amanda; Balthazar, Celso F.; Silva, Hugo L.A.; Cruz, Adriano G.; de Almeida Neves, Aline; Fonseca-Gonçalves, Andréa; Maia, Luciane C.
Source:
Journal of functional foods 2019 v.54 pp. 241-248
ISSN:
1756-4646
Subject:
Streptococcus mutans; Streptococcus parasanguinis; Streptococcus salivarius,   etc   ; Lactobacillus casei; biofilm; enamel; ewe milk; hardness; inoculum; micro-computed tomography; models; polystyrenes; probiotics; starter cultures;     Show all 14 Subjects
Abstract:
... The effects of probiotic fermented sheep’s milk containing Lactobacillus casei 01 on enamel demineralization and microorganism counts in a mixed biofilm model were investigated. Enamel blocks (N = 50) were fixed in polystyrene plates in which a mixed biofilm (Streptococcus mutans 25175, Streptococcus parasanguinis 903, and Streptococcus salivarius 8618) was formed. The mature biofilm was treated f ...
DOI:
10.1016/j.jff.2019.01.025

4. Synthesis and evaluation of antibacterial and antibiofilm activities of pyridin-2-yl hexanoate

Author:
Kouidhi, Bochra; Hagar, Mohamed; Radwan, Nagi R.E.; Chaieb, Kamel
Source:
Microbial pathogenesis 2018 v.125 pp. 205-209
ISSN:
0882-4010
Subject:
Streptococcus mutans; Streptococcus oralis; Streptococcus salivarius,   etc   ; antimicrobial properties; minimum inhibitory concentration; virulent strains;     Show all 6 Subjects
Abstract:
... Synthesized Pyridin-2-yl hexanoate was screened for its antibacterial and antibiofilm activities using the broth microdilution method and XTT assay respectively. The obtained results revealed that synthesized molecule inhibited the growth of pathogenic bacteria (MICs value ranged from 80 to 640 μg ml⁻¹). Moreover, it induced a strong antibiofilm effect against Gram positive cocci (BIC50 was 366, 3 ...
DOI:
10.1016/j.micpath.2018.09.022

5. How BspC from Streptococcus agalactiae Interacts with Host Vimentin during Meningitis

Author:
Beninati, Concetta; Famà, Agata; Teti, Giuseppe
Source:
Trends in microbiology 2019 v.27 no.9 pp. 727-728
ISSN:
0966-842X
Subject:
Streptococcus agalactiae,   etc   ; bacterial proteins; meninges; meningitis; mortality; pathogens; vimentin;     Show all 7 Subjects
Abstract:
... Streptococcus agalactiae meningitis is a frequent neonatal disease associated with high mortality and permanent neurological damage. Deng et al. (PLoS Pathog., 2019) now show that interactions between the bacterial protein BspC and host cell vimentin participate in the process of invasion of the meninges by this bacterial pathogen. ...
DOI:
10.1016/j.tim.2019.07.001

6. Anticariogenic Activity of Agarobiose and Agarooligosaccharides Derived from Red Macroalgae

Author:
Yu, Sora; Yun, Eun Ju; Kim, Dong Hyun; Park, So Young; Kim, Kyoung Heon
Source:
Journal of agricultural and food chemistry 2019 v.67 no.26 pp. 7297-7303
ISSN:
1520-5118
Subject:
Streptococcus mutans,   etc   ; agarose; lactic acid; macroalgae; monosaccharides; oligosaccharides; xylitol;     Show all 7 Subjects
Abstract:
... 3,6-Anhydro-l-galactose (AHG) produced from agarose in red macroalgae was recently suggested as an anticariogenic sugar to replace widely used xylitol. However, the multi-step process for obtaining monomeric sugar AHG from agarose may be expensive. Generally, it is easier to obtain oligosaccharides than monosaccharides from polysaccharides. Therefore, a one-step process to obtain agarobiose (AB) f ...
DOI:
10.1021/acs.jafc.9b01245

7. A comparison of flocked nylon swabs and non-flocked rayon swabs for detection of respiratory bacteria in nasopharyngeal carriage in Australian Indigenous children

Author:
Wigger, Christine; Morris, Peter Stanley; Stevens, Matthew; Smith-Vaughan, Heidi; Hare, Kim; Beissbarth, Jemima; Leach, Amanda Jane
Source:
Journal of microbiological methods 2019 v.157 pp. 47-49
ISSN:
0167-7012
Subject:
Streptococcus pneumoniae,   etc   ; Haemophilus influenzae; Moraxella catarrhalis; bacteria; children; nylon; rayon;     Show all 7 Subjects
Abstract:
... This study compared flocked (nylon) swabs and (non-flocked) rayon swabs for the detection of Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis in nasopharyngeal samples from 20 enrolled Indigenous children under the age of 6 years living in remote Australian Aboriginal communities, and determined which swab the child or parent perceived to be more comfortable. There was no ...
DOI:
10.1016/j.mimet.2018.12.013

8. Parvimonas micra stimulates expression of gingipains from Porphyromonas gingivalis in multi-species communities

Author:
Neilands, Jessica; Davies, Julia R.; Bikker, Floris J.; Svensäter, Gunnel
Source:
Anaerobe 2019 v.55 pp. 54-60
ISSN:
1075-9964
Subject:
Streptococcus cristatus; Streptococcus gordonii; Streptococcus mitis,   etc   ; Actinomyces naeslundii; Fusobacterium nucleatum; Porphyromonas gingivalis; Streptococcus oralis; biofilm; blood serum; ecosystems; gingipain; glycolysis; heat treatment; microbiome; microorganisms; periodontitis; protein secretion; proteins; two-dimensional gel electrophoresis; virulence;     Show all 20 Subjects
Abstract:
... Dental biofilms are complex ecosystems containing many bacterial species that live in mutualistic relationships. These interactions can profoundly affect the virulence properties of the community. In this study we investigated how the production of gingipains, virulence factors from Porphyromonas gingivalis important in periodontal disease, was affected by other commonly found members of the sub-g ...
DOI:
10.1016/j.anaerobe.2018.10.007

9. Diterpenes isolated from Croton blanchetianus Baill: Potential compounds in prevention and control of the oral Streptococci biofilms

Author:
Sá Firmino, Nairley C.; Alexandre, Francisco Serra O.; de Vasconcelos, Mayron A.; Pinheiro, Aryane A.; Arruda, Francisco Vassiliepe S.; Guedes, Maria Lenise S.; Silveira, Edilberto R.; Teixeira, Edson H.
Source:
Industrial crops and products 2019 v.131 pp. 371-377
ISSN:
0926-6690
Subject:
Streptococcus mutans; Streptococcus parasanguinis,   etc   ; Croton; antimicrobial properties; biofilm; biomass; cell biology; diterpenoids; gentian violet; scanning electron microscopy; staining;     Show all 11 Subjects
Abstract:
... The aim of this work was to evaluate the antibiofilm activity of two diterpenes isolated from specimens of Croton blanchetianus against dental caries-related oral Streptococci. The diterpenes, methyl 12-hydroxy-3,4-seco-cleistanta-8,11,13,15,4(18)-pentaen-3-oate (ICB4) and ent-3,4-seco-atisan-4 (18),16-dien-3-oic acid (ICB8) were tested on the inhibition of the biofilm formation and on pre-formed ...
DOI:
10.1016/j.indcrop.2019.01.062

10. Chemical composition and in vitro antibacterial and antiproliferative activities of the essential oil from the leaves of Psidium myrtoides O. Berg (Myrtaceae)

Author:
Dias, Alline L. B.; Batista, Hellen R. F.; Estevam, Elisângela B. B.; Alves, Cassia C. F.; Forim, Moacir R.; Nicolella, Heloiza D.; Furtado, Ricardo A.; Tavares, Denise C.; Silva, Thayna S.; Martins, Carlos H. G.; Miranda, Mayker L. D.
Source:
Natural product research 2019 v.33 no.17 pp. 2566-2570
ISSN:
1478-6427
Subject:
Streptococcus mitis; Streptococcus mutans; Streptococcus salivarius,   etc   ; Psidium; Streptococcus sanguinis; Streptococcus sobrinus; alpha-bisabolol; antibacterial properties; antineoplastic agents; cell growth; chemical composition; cytotoxicity; essential oils; fibroblasts; gas chromatography-mass spectrometry; human cell lines; humans; inhibitory concentration 50; leaves; lungs; minimum inhibitory concentration; neoplasm cells; pathogens;     Show all 23 Subjects
Abstract:
... In this study, the chemical composition and antibacterial and antiproliferative potential of the essential oil obtained from fresh leaves of Psidium myrtoides (PM-EO) against oral pathogens and human tumour cell lines were investigated for the first time. GC-FID and GC-MS analyses showed that trans-β-caryophyllene (30.9%), α-humulene (15.9%), α-copaene (7.8%), caryophyllene oxide (7.3%) and α-bisa ...
DOI:
10.1080/14786419.2018.1457664

11. In vitro activity of lascufloxacin, a novel fluoroquinolone antibacterial agent, against various clinical isolates of anaerobes and Streptococcus anginosus group

Author:
Yamagishi, Yuka; Matsukawa, Yoko; Suematsu, Hiroyuki; Mikamo, Hiroshige
Source:
Anaerobe 2018 v.54 pp. 61-64
ISSN:
1075-9964
Subject:
Streptococcus anginosus,   etc   ; anaerobes; antibacterial properties; antibiotics; fluoroquinolones;     Show all 5 Subjects
Abstract:
... The in vitro activities of lascufloxacin were evaluated by comparison with seven reference compounds using 412 clinical isolates of anaerobes and Streptococcus anginosus group. Lascufloxacin showed potent and broad antibacterial activities greater than those of existing quinolones against the clinical isolates used in this study. ...
DOI:
10.1016/j.anaerobe.2018.08.002

12. Coupling xylitol with remineralizing agents improves tooth protection against demineralization but reduces antibiofilm effect

Author:
Gargouri, Wafa; Zmantar, Tarek; Kammoun, Rym; Kechaou, Nabil; Ghoul-Mazgar, Sonia
Source:
Microbial pathogenesis 2018 v.123 pp. 177-182
ISSN:
0882-4010
Subject:
Streptococcus constellatus; Streptococcus mutans; Streptococcus oralis,   etc   ; Streptococcus salivarius; antimicrobial properties; biofilm; casein; chewing gum; gentian violet; humans; hydroxyapatite; mastication; polarized light microscopy; scanning electron microscopy; staining; teeth; xylitol;     Show all 17 Subjects
Abstract:
... To explore the efficiency of xylitol chewing gum enriched or not with remineralizing agents to protect tooth against cariogenic biofilm formation and demineralization. Six groups of chewing gums were prepared; Group 1: isomalt (1.8%), Group 2: casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) (3%) + isomalt (1.8%), Group 3: hydroxyapatite (HAP) (2.5%) + isomalt (1.8%), Group 4: xylitol ( ...
DOI:
10.1016/j.micpath.2018.06.038

13. Increasing the efficiency of CRISPR‐Cas9‐VQR precise genome editing in rice

Author:
Hu, Xixun; Meng, Xiangbing; Liu, Qing; Li, Jiayang; Wang, Kejian
Source:
Plant biotechnology journal 2018 v.16 no.1 pp. 292-297
ISSN:
1467-7644
Subject:
Streptococcus pyogenes,   etc   ; RNA; gene editing; genomics; rice;     Show all 5 Subjects
Abstract:
... Clustered regularly interspaced short palindromic repeats‐associated protein 9 (CRISPR‐Cas9) is a revolutionary technology that enables efficient genomic modification in many organisms. Currently, the wide use of Streptococcus pyogenes Cas9 (SpCas9) primarily recognizes sites harbouring a canonical NGG protospacer adjacent motif (PAM). The newly developed VQR (D1135V/R1335Q/T1337R) variant of Cas9 ...
DOI:
10.1111/pbi.12771
PubMed:
28605576
PubMed Central:
PMC5785341

14. Antimicrobial resistance and virulence genes of Streptococcus isolated from dairy cows with mastitis in China

Author:
Tian, X.Y.; Zheng, N.; Han, R.W.; Ho, H.; Wang, J.; Wang, Y.T.; Wang, S.Q.; Li, H.G.; Liu, H.W.; Yu, Z.N.
Source:
Microbial pathogenesis 2019 v.131 pp. 33-39
ISSN:
0882-4010
Subject:
Streptococcus agalactiae; Streptococcus dysgalactiae; Streptococcus uberis,   etc   ; agar gel electrophoresis; antibiotic resistance; benzylpenicillin; bovine mastitis; ciprofloxacin; dairy cows; doxycycline; milk; oxacillin; pathogens; phenotype; polymerase chain reaction; raw milk; resistance genes; tetracycline; virulence; China;     Show all 20 Subjects
Abstract:
... Streptococcus is a major mastitis-causing pathogen in dairy cows. To investigate the prevalence, antimicrobial resistance and virulence gene of Streptococcus in mastitic milk, a total of 735 mastitic raw milk samples from dairy cows in 11 provinces of China were collected and tested. Antimicrobial resistance of Streptococcus isolates was determined by disc diffusion against 8 classes 29 antimicrob ...
DOI:
10.1016/j.micpath.2019.03.035

15. Identification and typing of Vagococcus salmoninarum using genomic and proteomic techniques

Author:
Torres‐Corral, Yolanda; Santos, Ysabel
Source:
Journal of fish diseases 2019 v.42 no.4 pp. 597-612
ISSN:
0140-7775
Subject:
Streptococcus agalactiae; Streptococcus iniae; Streptococcus parauberis,   etc   ; Carnobacterium piscicola; Lactococcus garvieae; Vagococcus salmoninarum; blood serum; cross reaction; electrophoresis; fish; florfenicol; genomics; matrix-assisted laser desorption-ionization mass spectrometry; phenotype; proteomics; random amplified polymorphic DNA technique; serodiagnosis; surface proteins;     Show all 18 Subjects
Abstract:
... This study reports on the characterization of Vagococcus salmoninarum using phenotypic, serological, antigenic, genetic and proteomic methods. All strains of V. salmoninarum were resistant to most of the antimicrobials tested, and only 10% of strains were sensitive to florfenicol. Serological analysis demonstrated a high antigenic homogeneity within the species. No cross‐reaction was detected with ...
DOI:
10.1111/jfd.12967

16. Antibacterial activity and lantibiotic post-translational modification genes in Streptococcus spp. isolated from ruminal fluid

Author:
Sabino, Yasmin Neves Vieira; Fochat, Romário Costa; Lima, Junior Cesar Fernandes; Ribeiro, Marlice Teixeira; Arcuri, Pedro Braga; da Costa Carneiro, Jailton; Machado, Marco Antônio; de Lima Reis, Daniele Ribeiro; Ferreira Machado, Alessandra Barbosa; Húngaro, Humberto Moreira; Ribeiro, João Batista; Paiva, Aline Dias
Source:
Annals of microbiology 2019 v.69 no.2 pp. 131-138
ISSN:
1590-4261
Subject:
Streptococcus equinus; Streptococcus gallolyticus; Streptococcus lutetiensis,   etc   ; antibacterial properties; antibiotics; antimicrobial peptides; bacteriocins; ecosystems; genes; peptidase K; polymerase chain reaction; post-translational modification; pulsed-field gel electrophoresis; ribosomal RNA; rumen bacteria; rumen fluids;     Show all 16 Subjects
Abstract:
... The production of bacteriocins is frequently described in high microbial diversity environments. The aims of this study were to screen Streptococcus spp. isolated from rumen for their antibacterial potential and to determine the presence of post-translational modification genes for lantibiotic class of bacteriocins. The isolates were tested for production of antibacterial compounds by the spot-on- ...
DOI:
10.1007/s13213-018-1407-2

17. Effects of mastic gum (Pistacia lentiscus) on chemical, rheological, and microbiological properties of yogurt ice cream

Author:
Şimşek, Bedia; Aksoy, Arzu; Kırhan, Selin; Şahin Topçu, Deniz
Source:
Journal of food processing and preservation 2019 v.43 no.7 pp. e13945
ISSN:
0145-8892
Subject:
Streptococcus salivarius; Streptococcus thermophilus,   etc   ; Pistacia lentiscus; bacteria; functional properties; ice cream; ingredients; melting; principal component analysis; sensory properties; storage time; yogurt; Mediterranean region;     Show all 13 Subjects
Abstract:
... The aim of this study was to determine the effects of mastic gum (0.02 and 0.04%) in yogurt ice cream. The physicochemical, textural, rheological, and sensory properties, and the vitality of yogurt bacteria were investigated. The melting rate and overrun of samples were detected to be 12.14–17.82/g/min and 22.45–27.93% on the first day of storage, respectively. The mix showed non‐Newtonian pseudop ...
DOI:
10.1111/jfpp.13945

18. Characterization of folate production and probiotic potential of Streptococcus gallolyticus subsp. macedonicus CRL415

Author:
Laiño, Jonathan Emiliano; Levit, Romina; de Moreno de LeBlanc, Alejandra; Savoy de Giori, Graciela; LeBlanc, Jean Guy
Source:
Food microbiology 2019 v.79 pp. 20-26
ISSN:
0740-0020
Subject:
Streptococcus gallolyticus; Streptococcus macedonicus,   etc   ; adhesion; adverse effects; antibiotics; carbon; dairy industry; fermentation; folic acid; foods; gene expression; glucose; intestines; lactic acid bacteria; milk; pH; probiotics; starter cultures;     Show all 18 Subjects
Abstract:
... Mandatory fortification of foods with folic acid is being questioned by many scientists principally because of the potential adverse secondary effects associated with their excessive consumption. It has been shown that selected strains of lactic acid bacteria (LAB) are able to produce natural forms of folate and these could be included in foods to prevent deficiencies without causing adverse effec ...
DOI:
10.1016/j.fm.2018.10.015

19. Antagonistic effects of Streptococcus and Lactobacillus probiotics in pharyngeal biofilms

Author:
Humphreys, G.J.; McBain, A.J.
Source:
Letters in applied microbiology 2019 v.68 no.4 pp. 303-312
ISSN:
0266-8254
Subject:
Streptococcus pyogenes; Streptococcus salivarius,   etc   ; DNA fingerprinting; Lactobacillus acidophilus; Lactobacillus plantarum; Lactococcus plantarum; Staphylococcus; acidification; acids; antagonism; bacteria; biofilm; fermentation; models; pathogens; pharyngitis; pharynx; plate count; probiotics; throat; viability;     Show all 21 Subjects
Abstract:
... Direct antagonism towards pathogens including Streptococcus pyogenes is a proposed mechanism of pharyngeal probiosis but off‐target effects on the symbiotic microbiota of the throat are possible and may be beneficial, harmful or neutral. We have assessed the bacteriological effects of two candidate Lactobacillus probiotics and the established pharyngeal probiotic Streptococcus salivarius K12. Anta ...
DOI:
10.1111/lam.13133

20. Structure determination of Streptococcus suis serotypes 7 and 8 capsular polysaccharides and assignment of functions of the cps locus genes involved in their biosynthesis

Author:
Goyette-Desjardins, Guillaume; Vinogradov, Evgeny; Okura, Masatoshi; Takamatsu, Daisuke; Gottschalk, Marcelo; Segura, Mariela
Source:
Carbohydrate research 2019 v.473 pp. 36-45
ISSN:
0008-6215
Subject:
Streptococcus pneumoniae; Streptococcus suis,   etc   ; biosynthesis; blood serum; chemical composition; encapsulation; genes; glycosyltransferases; loci; pathogenesis; pathogens; polysaccharides; rabbits; serotypes; spectral analysis; swine; swine diseases; virulence;     Show all 18 Subjects
Abstract:
... Streptococcus suis serotypes 7 and 8 are counted among the top six S. suis serotypes causing clinical disease in pigs. Yet, limited information is available on these serotypes. Since S. suis serotyping system is based upon capsular polysaccharide (CPS) antigenicity and the CPS is considered a major virulence factor for encapsulated pathogens, here we determined for the first time the chemical comp ...
DOI:
10.1016/j.carres.2018.12.009