| Proving the antimicrobial spectrum of an amphoteric surfactant-sol-gel coating: a food-borne pathogen study. | |
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MedLine Citation:
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PMID: 18536948 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An antimicrobial coating was evaluated in this work for its antimicrobial efficacy against common food-borne pathogens. Dodecyl-di(aminoethyl)-glycine, an organic disinfectant, was immobilized in a silicon oxide matrix to generate thin films over surfaces by means of the sol-gel process. Tetraethoxysilane was used as the polymeric precursor. No alteration of optical transparency on the covered surfaces was observed. Topographic images obtained with atomic force microscopy showed a homogeneous film with no additional roughness added by the polymer to the surface. The attenuated total reflectance-Fourier transform infrared spectral data showed the presence of dodecyl-di(aminoethyl)-glycine in the silicon oxide network after a normal cleaning procedure. The antimicrobial efficacy test was performed by exposing coated slides to suspensions of common food-borne pathogens: Escherichia coli, Staphyloccocus aureus, E. coli O157:H7, Salmonella typhi, S. cholerasuiss, Listeria innocua and L. monocytogenes. The coating activity was not only bacteriostatic but also bactericidal. The percent reduction of viable microorganism exposure over 24 h to the coated surface ranged between 99.5%, for the more resistant gram-positive bacteria, and over 99.999%, for most gram-negative bacteria. The silicon matrix itself did not account for any reduction of viable microbial, even more an increase was observed. |
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Authors:
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G J Copello; S Teves; J Degrossi; M D'Aquino; M F Desimone; L E Díaz |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-06-07 |
Journal Detail:
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Title: Journal of industrial microbiology & biotechnology Volume: 35 ISSN: 1367-5435 ISO Abbreviation: J. Ind. Microbiol. Biotechnol. Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-08-20 Completed Date: 2008-12-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9705544 Medline TA: J Ind Microbiol Biotechnol Country: England |
Other Details:
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Languages: eng Pagination: 1041-6 Citation Subset: IM |
Affiliation:
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Cátedra de Química Analítica Instrumental, Universidad de Buenos Aires (UBA), Facultad de Farmacia y Bioquímica, Junín 956 - Piso 3 masculine (1113), Buenos Aires, Argentina. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Anti-Infective Agents
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chemistry,
pharmacology* Bacteria / drug effects* Colony Count, Microbial Disinfectants / chemistry, pharmacology* Food Industry / methods Food Microbiology* Gels / chemistry, pharmacology* Glycine / analogs & derivatives*, chemistry, pharmacology Microscopy, Atomic Force Spectrophotometry, Infrared Spectrophotometry, Ultraviolet Surface-Active Agents / chemistry, pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Anti-Infective Agents; 0/Disinfectants; 0/Gels; 0/Surface-Active Agents; 56-40-6/Glycine; 6843-97-6/dodicin |
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