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Int J Nanomedicine. 2011;6:1937-43. doi: 10.2147/IJN.S24280. Epub 2011 Sep 9.

Bactericidal activities of woven cotton and nonwoven polypropylene fabrics coated with hydroxyapatite-binding silver/titanium dioxide ceramic nanocomposite "Earth-plus".

Author information

1
Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan.

Abstract

BACKGROUND:

Bacteria from the hospital environment, including linens and curtains, are often responsible for hospital-associated infections. The aim of the present study was to evaluate the bactericidal effects of fabrics coated with the hydroxyapatite-binding silver/titanium dioxide ceramic nanocomposite "Earth-plus".

METHODS:

Bactericidal activities of woven and nonwoven fabrics coated with Earth-plus were investigated by the time-kill curve method using nine bacterial strains, including three Staphylococcus aureus, three Escherichia coli, and three Pseudomonas aeruginosa strains.

RESULTS:

The numbers of viable S. aureus and E. coli cells on both fabrics coated with Earth-plus decreased to below 2 log(10) colony-forming units/mL in six hours and reached the detection limit in 18 hours. Viable cell counts of P. aeruginosa on both fabrics coated with Earth-plus could not be detected after 3-6 hours. Viable cells on woven fabrics showed a more rapid decline than those on nonwoven fabrics. Bacterial cell counts of the nine strains on fabrics without Earth-plus failed to decrease even after 18 hours.

CONCLUSION:

Woven cotton and nonwoven polypropylene fabrics were shown to have excellent antibacterial potential. The woven fabric was more bactericidal than the nonwoven fabric.

KEYWORDS:

Earth-plus; Escherichia coli; Pseudomonas aeruginosa; Staphylococcus aureus; TiO2; bactericidal; ceramic; hydroxyapatite; silver

PMID:
21931489
PMCID:
PMC3173056
DOI:
10.2147/IJN.S24280
[Indexed for MEDLINE]
Free PMC Article
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