Assessing the efficiency of floor disinfection on bacterial decontamination in sanandaj governmental hospitals

Document Type: Original Article


1 Student Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran

2 Cellular and Molecular Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran

3 Department of Medicine, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran

4 Department of Agricultural Economics, University of Kurdistan, Sanandaj, Iran

5 Department of Health Education, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran

6 Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran


Despite regular disinfection and decontamination of the hospital floors and surfaces, resistant pathogens from the hospital surfaces and their transmission to humans have been reported recently. The resistance of pathogens to the disinfectant agents or failed disinfection techniques have put the routine floor and non-critical surface disinfection done in hospitals into question with regard to their effectiveness. In this study, 112 samples were collected using cotton swabs which were immediately placed in a broth agar media. The collected samples were cultured in broth agar and eosin methylene blue media. We determined the bacterial load on the ward floors and patient rooms before and after disinfection and assessed the effectiveness of the used method and decontamination agents in cleaning the floors. The results showed that disinfection did not have a significant effect on the hospital surface decontamination, and the disinfection process did not change the colony count in the different wards of the hospital (P-value < 0.05).


1.         Attaway HH, Fairey S, Steed LL, Salgado CD, Michels HT, Schmidt MG. Intrinsic bacterial burden associated with intensive care unit hospital beds: effects of disinfection on population recovery and mitigation of potential infection risk. American journal of infection control 2012;40(10):907-12.

2.         Quinn MM, Henneberger PK. Cleaning and disinfecting environmental surfaces in health care: Toward an integrated framework for infection and occupational illness prevention. American journal of infection control 2015;43(5):424-34.

3.         Rafiee M, Saeedi R, Abtahi M, Ghalami S, Jahangiri-Rad M. Prevalence of hospital-acquired infections in intensive care units in public hospitals in Tehran, Iran, in 2012-2014. Journal of Advances in Environmental Health Research 2016;4(1):34-41.

4.         Klevens RM, Edwards JR, Richards Jr CL, Horan TC, Gaynes RP, Pollock DA, et al. Estimating health care-associated infections and deaths in US hospitals, 2002. Public health reports 2007:160-6.

5.         Weinstein RA. Epidemiology and control of nosocomial infections in adult intensive care units. The American journal of medicine 1991;91(3):S179-S84.

6.         Weber DJ, Rutala WA, Miller MB, Huslage K, Sickbert-Bennett E. Role of hospital surfaces in the transmission of emerging health care-associated pathogens: norovirus, Clostridium difficile, and Acinetobacter species. American journal of infection control 2010;38(5):S25-S33.

7.         Rutala WA, Gergen MF, Weber DJ. Room decontamination with UV radiation. Infection Control & Hospital Epidemiology 2010;31(10):1025-9.

8.         Ray AJ, Hoyen CK, Taub TF, Eckstein EC, Donskey CJ. Nosocomial transmission of vancomycin-resistant enterococci from surfaces. Jama 2002;287(11):1400-1.

9.         Weinstein RA, Hota B. Contamination, disinfection, and cross-colonization: are hospital surfaces reservoirs for nosocomial infection? Clinical infectious diseases 2004;39(8):1182-9.

10.       Boyce JM. Environmental contamination makes an important contribution to hospital infection. Journal of Hospital Infection 2007;65:50-4.

11.       Dancer S. The role of environmental cleaning in the control of hospital-acquired infection. Journal of Hospital Infection 2009;73(4):378-85.

12.       Wiemken TL, Curran DR, Pacholski EB, Kelley RR, Abdelfattah RR, Carrico RM, et al. The value of ready-to-use disinfectant wipes: compliance, employee time, and costs. American journal of infection control 2014;42(3):329-30.

13.       Sehulster L, Chinn RY, Arduino M, Carpenter J, Donlan R, Ashford D, et al. Guidelines for environmental infection control in health-care facilities. Morbidity and Mortality Weekly Report Recommendations and Reports RR 2003;52(10).

14.       Weber DJ, Anderson D, Rutala WA. The role of the surface environment in healthcare-associated infections. Current opinion in infectious diseases 2013;26(4):338-44.

15.       Dancer S. How do we assess hospital cleaning? A proposal for microbiological standards for surface hygiene in hospitals. Journal of Hospital Infection 2004;56(1):10-5.

16.       Griffith C, Obee P, Cooper R, Burton N, Lewis M. The effectiveness of existing and modified cleaning regimens in a Welsh hospital. Journal of Hospital Infection 2007;66(4):352-9.

17.       Campbell J, Jones C, Hill B. Cleaning: Finding a Microbiological Standard. International Journal of Facility Management 2014;5(1).

18.       Andersen B, Rasch M, Kvist J, Tollefsen T, Lukkassen R, Sandvik L, et al. Floor cleaning: effect on bacteria and organic materials in hospital rooms. Journal of Hospital Infection 2009;71(1):57-65.

19.       Rutala W, Weber D. Surface disinfection: should we do it? Journal of Hospital Infection 2001;48:S64-S8.

20.       Dancer SJ. Controlling hospital-acquired infection: focus on the role of the environment and new technologies for decontamination. Clinical microbiology reviews 2014;27(4):665-90.

21.       Portner JA, Johnson JA. Guidelines for reducing pathogens in veterinary hospitals: disinfectant selection, cleaning protocols, and hand hygiene. Compendium (Yardley, PA) 2010;32(5):E1-11; quiz E2.

22.       Ayliffe G, Collins B, Lowbury E, Babb J, Lilly H. Ward floors and other surfaces as reservoirs of hospital infection. Journal of Hygiene 1967;65(04):515-36.

23.       Ayliffe G, Collins B, Lowbury E. Cleaning and disinfection of hospital floors. British medical journal 1966;2(5511):442.

24.       Palmer PH, Yeoman DM. A study to assess the value of disinfectants when washing ward floors. Med J Aust 1972;2(22):1237-9.

25.       Ducel G, Fabry J, Nicolle L, Organization WH. Prevention of hospital-acquired infections: a practical guide 2002.