RESUMO
[Micro 10] and [Deconex 53 plus] are current samples of new QAC generation. Although these compounds have been widely evaluated, there are still some doubts about their disinfecting power. The purpose of this investigation was to evaluate the clinical efficiency of Micro 10 and Deconex 53 plus. In this single blinded study, the microorganisms' suspension was prepared according to AOAC guidelines [containing standard and resistant pseudomonas aeruginosa, staphylococcus aureous, salmonella typhi muriom, bacillus subtillis, mycobacterium bovis, trichophyton menta grophit]. The instruments [syringes] were contaminated using a sampler and the above mentioned suspension. After cleaning and disinfecting the instruments according to manufacture's instructions, samples were collected for cultivation and incubation. The colony formation units were observed and data was analyzed using fisher's exact, chi square and Mann Whitney tests in order to identify the group differences and significance levels. Micro 10 5% and Deconex 53 plus 2% had similar bactericidal effect on pseudomonas aeruginosa, staphylococcus aureous, salmonella typhimuriom and fungicidal effect on trichopyton menta grophit with no significant difference compared to autoclave. However, in comparison with Deconex 53 plus 2% and autoclave, the Micro 10 5% showed significant effect against bacillus subtilis and mycobacterium bovis [P < 0.001]. Deconex 53 plus can be classified as an intermediate level disinfectant