EVALUATION OF THE EFFECTIVENESS OF AUTOMATED DISINFECTION MEDIATED BY HYDROGEN PEROXIDE AND SILVER ION AEROSOLIZING EQUIPMENT IN PUBLIC BUSES IN THE CITY OF SÃO PAULO, BRAZIL

• DOI: https://doi.org/10.22533/at.ed.1317412409012

• Palavras-chave: Environmental monitoring; Sanitizers; Air; Bacterium; Fungi; Means of transport.

• Keywords: Environmental monitoring; Sanitizers; Air; Bacterium; Fungi; Means of transport.

• Abstract:

  Goal: evaluate the effectiveness of using no-touch technology through aerosolization of hydrogen peroxide and silver ions, known as HyperDryMist® (HDM), in the internal hygiene of public transport buses in the city of São Paulo. Methodology: A total of 294 samples were collected on buses, divided into two categories. The buses were sanitized using a manual cleaning protocol and HDM® technology. The samples were sent to the Mycology Center of the Adolfo Lutz Institute for analysis. Results: Collections on bus surfaces after manual cleaning with sodium hypochlorite solution showed growth of fourteen genera of microorganisms and, after applying the protocol with HDM®, there was a reduction of 72% of bacterial genera and 100% of fungal genera, with 3mL /m3 and 4mL/m3 of product applied, respectively. Conclusions: disinfection carried out using HDM® technology was more effective in eliminating CFU/m³ of bacteria and fungi at concentrations of 3ml/m³ and 4ml/m³, respectively. These concentrations substantially reduced the spread of microorganisms and the possibility of contamination of employees and users of public transport.