Effect on cell surface hydrophobicity and susceptibility of Helicobacter pylori to medicinal plant extracts.

  title={Effect on cell surface hydrophobicity and susceptibility of Helicobacter pylori to medicinal plant extracts.},
  author={Heidi Annuk and Siiri Hirmo and E. T{\"u}ri and Marika Mikelsaar and Elmar Arak and Torkel Wadström},
  journal={FEMS microbiology letters},
  volume={172 1},
Effects on aqueous extracts of medicinal plants on ten Helicobacter pylori strains were studied by the salt aggregation test to determine the possibility to modulate their cell surface hydrophobicity and by an agar diffusion assay for detection of antimicrobial activity. It was established that aqueous extracts of bearberry and cowberry leaves enhance cell aggregation of all H. pylori strains tested by the salt aggregation test, and the extract of bearberry possessed a remarkable bacteriostatic… 
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Studies are presented on hydrophobicities of staphylococcal cells of different species in connection with slime production and growth in serum-soft agar and a correlation between hydrophobicity and phagocytosis is supported.
Haemagglutination patterns of Helicobacter pylori
The great heterogeneity observed in HA patterns indicates that the HAs of different strains may recognize a heterogeneous class of sialoglycoconjugates on the erythrocyte membrane.
Mannose-resistant haemagglutination by Campylobacter pylori.
In preliminary experiments the haemagglutination could be inhibited with monosialogangliosides suggesting that these strains express sialic acid specific haemAGglutinin(s) which could be involved in colonization of mucosal surfaces.
Adhesion and its role in the virulence of enteropathogenic Escherichia coli.
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  • Biology, Medicine
    Clinical Microbiology Reviews
  • 1994
The definition ofEPEC based on serotyping is inaccurate and should be replaced by methods that specifically detect the virulence properties of EPEC, as it is now apparent that many isolates belonging to these serogroups are not pathogenic or belong to other pathogenic groups of E. coli.
Optimal survival of Helicobacter pylori under various transport conditions
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Effect of antibiotics on adherence of microorganisms to epithelial cell surfaces.
  • A. Shibl
  • Biology
    Reviews of infectious diseases
  • 1985
The ability of antibiotics to affect the properties of microbial adherence to cell surfaces may be an important criterion in selecting an antibiotic for therapy.
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H. pylori eradication is required in peptic ulcer disease and may be advocated in patients on profound acid suppressive therapy; it has been shown to cure gastritis and prevent ulcer recurrence, and further study is required to determine the efficacy in the primary and secondary prevention of atrophic Gastritis and gastric cancer.
Specific and non-specific interactions in bacterial adhesion to solid substrata
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