ABSTRACT
Aspergillosis is caused by ubiquitous and opportunist moulds of the genus Aspergillus, which contaminate the atmosphere by liberating thousands of conidia in the air, making it extremely important to use air filters and to implement proper programs of antisepsis and disinfection for the prevention of this disease. This study evaluated the in-vitro effectiveness of the chemical agents iodophor, quaternary ammonia and chlorexidine against A. fumigatus (8), A. niger (8), A. flavus (6) and A. terreus (1). Successive dilutions of disinfectants/antiseptics (log2) were prepared in RPMI for the test, and the suspension was adjusted until a final concentration of 5 x 104 UFC/mL. The microdilution test was done in agreement with NCCLS M-38 adapted for chemical agents, with microplates incubation at 35° C in constant agitation. The visual results were evaluated after 96 hours, and all Aspergillus spp. isolates used were resistant to iodophor at all concentrations tested. Quaternary ammonia and chlorexidine showed effectiveness against Aspergillus spp. isolates, except for one A. fumigatus and one A. terreus. According to these results the use of quaternary ammonia and chlorexidine is indicated for the prevention of aspergillosis, while the use of iodophor is questionable.
KEY WORDS
Aspergillosis; Aspergillus spp.; disinfectants and antiseptics
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