Tabriz University of Medical Sciences Advanced Pharmaceutical Bulletin 2228-5881 2 1 2012 06 30 Antimicrobial Activity of Chlorhexidine, Peracetic acid/ Peroxide hydrogen and Alcohol based compound on Isolated Bacteria in Madani Heart Hospital, Tabriz, Azerbaijan, Iran 57 59 10.5681/apb.2012.008 EN Reza Ghotaslou Nashmil Bahrami Journal Article 10.5681/apb.2012.008 2011 12 19 The aim of present study was to investigate efficiency of chemical agents on the isolated bacteria in Madani Heart Hospital, Tabriz, Iran. The minimum bactericide concentration of disinfectants chlorhexidine (Fort), peracetic acid (Micro) and an alcohol based compound (Deconex) on selected bacteria at different exposure times and various dilutions were determined by the standard suspension technique. The results showed that chlorhexidine, peracetic acid and quaternary ammonium compound had bactericidal activity on selected bacteria. The effective disinfectant was Deconex and also the Gram negative bacteria were more resistance to disinfectant relation to Gram positive bacteria. The results confirmed that these agents are able to disinfect and they can be used lonely. Pseudomonas aeruginosa was observed to show more resistance to the tested disinfectants, followed by E. coli, Klebsiella pneumonia, Enterobacter aerogenes and Gram positive bacteria.