Effectiveness of disinfection with alcohol 70% (w/v) of contaminated surfaces not previously cleaned

• Main Authors: Maurício Uchikawa Graziano, Kazuko Uchikawa Graziano, Flávia Morais Gomes Pinto, Camila Quartim de Moraes Bruna, Rafael Queiroz de Souza, Cesar Angelo Lascala
• Format: Article
• Language: English
• Published: Universidade de São Paulo 2013-04-01
• Series: Revista Latino-Americana de Enfermagem
• Subjects: Etanol; 2-Propanol; Desinfección; Programa de Control de Infecciones; Enfermería
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-11692013000200618&lng=en&tlng=en

OBJECTIVE: To evaluate the disinfectant effectiveness of alcohol 70% (w/v) using friction, without previous cleaning, on work surfaces, as a concurrent disinfecting procedure in Health Services. METHOD: An experimental, randomized and single-blinded laboratory study was undertaken. The samples were enamelled surfaces, intentionally contaminated with Serratia marcescens microorganisms ATCC 14756 106 CFU/mL with 10% of human saliva added, and were submitted to the procedure of disinfection WITHOUT previous cleaning. The results were compared to disinfection preceded by cleaning. RESULTS: There was a reduction of six logarithms of the initial microbial population, equal in the groups WITH and WITHOUT previous cleaning (p=0.440) and a residual microbial load ≤ 102 CFU. CONCLUSION: The research demonstrated the acceptability of the practice evaluated, bringing an important response to the area of health, in particular to Nursing, which most undertakes procedures of concurrent cleaning /disinfecting of these work surfaces.