Evaluation of disinfection of surfaces at an outpatient unit before and after an intervention program

• Main Authors: Mara Cristina Ribeiro Furlan, Adriano Menis Ferreira, Larissa da Silva Barcelos, Marcelo Alessandro Rigotti, Alvaro Francisco Lopes de Sousa, Aires Garcia dos Santos Junior, Denise de Andrade, Margarete Teresa Gottardo de Almeida, Mayckel da Silva Barreto
• Format: Article
• Language: English
• Published: BMC 2019-04-01
• Series: BMC Infectious Diseases
• Subjects: Disinfection; Hospital housekeeping; Health education; Infection control; Ambulatory care
• Online Access: http://link.springer.com/article/10.1186/s12879-019-3977-4

Abstract Background Cleaning and disinfection processes must be improved so that there is a reduction in environmental contamination of frequent-contact surfaces. The objective of this study was to evaluate cleaning and disinfection of surfaces at a specialized healthcare unit after an intervention program. Methods Exploratory, longitudinal, and correlational study carried out in a medium-complexity clinic. Two hundred and forty samples from five surfaces were collected during three phases: diagnosis; implementation of an intervention program; and evaluation of immediate and long-term effects. In total, 720 evaluations were made, performed through three monitoring methods: visual inspection; adenosine triphosphate bioluminescence assay (ATP); and aerobic colony count (ACC). The Wilcoxon, Mann-Whitney, and Fisher’s Exact tests were run to analyze data statistically. Results Cleaning and disinfection of surfaces were not being performed properly in most cases. Failure rates of surfaces reached 37.5 and 100% when the ATP and ACC procedures were used, respectively. However, after an intervention program, an improvement occurred. Success rates increased by 43.96% (ATP) and 12.46% (ACC) in phase I, by 70.6% (ATP) and 82.3% (ACC) immediately after interventions, and by 76.52% (ATP) and 85.76% (ACC) two months after the changes, showing that the program was effective. Conclusion The present study reveals that implementing intervention actions with a cleaning and healthcare team brings benefits to prevent the spread of pathogenic agents through frequently touched hospital surfaces.