The Antibacterial Activity of ZrO2 Nanoparticles on Biocide Resistant Bacilli in Paints (JABBv2n2a3) - synergy - synergy

The Antibacterial Activity of ZrO2 Nanoparticles on Biocide Resistant Bacilli in Paints Pages 49-53

O.F. Obidi1 and S.C.U. Nwachukwu2

1Department of Materials Science and Engineering, Iowa State University, IA, USA; 2Department of Microbiology, University of Lagos, Nigeria

DOI: http://dx.doi.org/10.12970/2311-1755.2014.02.02.2

Abstract: The antibacterial activity of four biocides against members of the class Bacilli isolated from paint and paint scrapings was investigated using the disc diffusion technique. Bacillus species were selected for this study amongst other organisms isolated from paint and paint scrapings because they were regularly isolated in highest populations when compared with other isolates detected. The biocides were made up of benzimidazole carbamate/2-n-octyl-4-isothiazolin -3-one (OIT)/Urea derivative), (5-Chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one (CIT/MCIT); (Carbendazim octylisothiazolone and Diuron) and (Chloromethyl and methylisothiazolone). Bacillus cereus and B. coagulans had 0% inhibition of all the biocides tested. Similar experiments with ZrO2 nanoparticles yielded 65% inhibition of Bacillus sphaericus and 80% of Brevibacillus choshinensis. The result of this study indicates the need for more sophisticated antimicrobials and underscores the superior efficacy of nano-structured antimicrobials over conventional biocides used in the paint industry. These findings will enhance efforts geared towards combating biocide-resistant microorganisms in the paint industry.

Keywords: Antibacterial activity, Bacilli, Biocides, Biodeteriorated paints, Nanoparticles. Read more

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