Efficacy of Disinfectants on Bacteria; Case Study of Isfahan Hospitals

Document Type : Original Article


Department of Pharmacodynamy & Toxicology, Faculty of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran


Aims: The internal unit and ICU of hospitals are a suitable environment for
growing of bacteria such as Staphylococcus epidermidis, Pseudomonas and
Acinetobacters. The aim of this study was to evaluate the efficacy of using
disinfectants on bacterial remove in Isfahan City, Iran, hospitals.
Instrument & Methods: This descriptive study was performed in Isfahan City,
Iran, hospitals in 2015. 200 samples were taken from random locations of the
hospitals. Sampling was carried out at the end of the business day and before
disinfecting the surfaces with sterile cotton swabs moistened by sterile saline.
After identification of bacteria, the numbers of bacterial colonies were counted
before disinfection in 1ml (CFU/ml).
Findings: The highest isolates were detected from emergency unit before
disinfection included Pseudomonas aeruginosa, Staphylococcus spp., Escherichia
coli, Proteus spp., Klebsiella spp., Acinetobacter spp., and Enterobacter spp. 255
cases of bacteria were found at 27 positive samples. The most common isolated
bacteria after disinfection were Staphylococcus epidermidis (76 cases), E. coli
(42 cases) and Micrococcus luteus (39 cases).
Conclusion: The disinfecting process of Isfahan Hospitals is effective in
removing bacterial infections.