Efecto de un extracto etanólico de propóleos sobre Pseudomonas aeruginosa en estado planctónico y sésil.

Pseudomonas aeruginosa is a glucose non-fermenting Gramnegative bacillus that is commonly isolated in nosocomial infections. The usual antimicrobials failure is the result of the increase in antibiotics resistance and this microorganism's involvement in pathologies with biofilm formation. Therefore, the ethanol extract of propolis becomes an interesting subject of study as a therapeutic alternative against this opportunist pathogen. In this regard, the main objective of this investigation was to evaluate the effect of ethanol extract of propolis (EEP) over Pseudomonas aeruginosa in planktonic and sessile state. This research was categorized as a descriptive quasi-experimental type of investigation. It was determined the minimum inhibitory (MIC) and bactericide (MBC) concentration by the macrodilution tubes method in planktonic state, and the microdilution over biofilms formed on polystyrene plates in sessile state. The results showed that whereas there wasn't a bacteriostatic or bactericide effect in sessile state, the EEP possesses 4% of non total but partial bacteriostatic activity and 8% of bactericide activity over P. aeruginosa in planktonic state. It concludes that the EEP of the Venezuelan state of Táchira is effective against P. aeruginosa in planktonic state but it won't have antimicrobial activity over biofilms formed by the same species. [ABSTRACT FROM AUTHOR]