Monitoramento de bioaerossóis em condicionadores de ar em uma instituição de ensino em Trindade - GO

Abstract

In recent years, studies have shown that many cases of respiratory infections are caused by the lack of maintenance of air conditioners. The objective of this study was to evaluate the amount of bioaerosols in air conditioning units of the classrooms of Faculdade União de Goyazes before and after cleaning and assess the air quality. The samples were collected with direct sterile swab in the filters of the air conditioners and through sedimentation method in agar culture media Nutrient (MN) and Sabouraud dextrose agar (SDA). The amount of microorganisms obtained from the filter before the air cleaning process has countless while after the process was 11.1 5.5 and 3.1 1.3 CFU/cm2 in ASD and MN, respectively. In the assessment of air quality, the value obtained before hygiene was 7.5 0,7 and 12 2.8 CFU/cm3 in MN and ASD, respectively. The large amount of microorganisms isolated from air conditioners, was not decisive to change the air quality. Nevertheless, we observed that the cleaning of the air conditioners are extremely important, due to the significant difference between the periods before and after routine cleaning of equipment.