The effectiveness of two commonly used preservatives, sodium benzoate and potassium disulfite, was evaluated in terms of their bactericidal activity and capacity to induce changes in the surface properties of Escherichia coli isolated from commercial food preserves. Preservative treatment over a five-week test period resulted in controlling the multiplication of these organisms and causing a decline in cell-surface hydrophobicity, hemagglutinating ability and adherence capacity to rat intestinal cells of E. coli isolates. A loss in motility was also exhibited.
- MeSH
- bakteriální adheze účinky léků MeSH
- benzoáty farmakologie MeSH
- biotest MeSH
- buněčná membrána účinky léků metabolismus MeSH
- elektronová mikroskopie MeSH
- Escherichia coli účinky léků růst a vývoj patogenita ultrastruktura MeSH
- hemaglutinace účinky léků MeSH
- konzervace potravin MeSH
- krysa rodu Rattus MeSH
- kultivované buňky MeSH
- kyselina benzoová MeSH
- mikrobiální testy citlivosti MeSH
- potravinářská mikrobiologie MeSH
- siřičitany farmakologie MeSH
- střeva cytologie MeSH
- virulence účinky léků MeSH
- zvířata MeSH
- Check Tag
- krysa rodu Rattus MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- benzoáty MeSH
- kyselina benzoová MeSH
- potassium metabisulfite MeSH Prohlížeč
- siřičitany MeSH
The enterotoxigenicity, klebocinogeny and susceptibility to antibiotics for 100 strains of Klebsiella pneumoniae isolated from various food samples is reported. 49% of the samples supported growth of K. pneumoniae: a high proportion of these strains were isolated from sweets and snacks (51%). Enterotoxigenicity as determined by a coagglutination test with anti-LT4 coated staphylococci was observed in 61 of 100 Klebsiella isolates. 21% of the strains were found to be klebocin producers against the K. pneumoniae WC indicator strain. A significant correlation was observed between klebocinogeny and enterotoxigenicity (p less than 0.05). Most strains (91 and 74% respectively) were inhibited by gentamicin and nalidixic acid. Most of the strains were multiply drug-resistant.
