Effect of MVX (Titanium Dioxide) on the Microbial Colonization of Surfaces in an Intensive Care Unit

Summary

Environmental cleanliness As antimicrobial resistance is a major and overall deteriorating public health problem international cooperation is necessary. Continued progress is needed to implement and improve programmes for the prevention and control of antimicrobial resistance and HAIs.

Environmental cleanliness might be one of the most important initiatives to reduce HAIs. Hospital surfaces are heavily contaminated with bacteria with the highest numbers on surfaces closest to the patients. Bed rails, nurse call buttons, curtains, towel dispensers, door handles, sinks, floors, clinical information stations, medical devices, stethoscopes, staff toilets etc. Actually, general hospital wards and Intensive Care Units are loaded with an abundance of potential pathogens 8,9,10. Surviving days, weeks or even months in the environment 11. Colonizing patients with bacteria from the hospital environment and getting HAIs or even die.

As most ventilator-associated pneumonias (VAPs) are the result of nosocomial microorganisms the environment plays an important role in the acquisition of pathogenic bacteria by contaminating health care workers hands and equipment 12,13. Furthermore, ICUs and wards struggle with colonized patients with ESBL-bacteria from sinks eventually leading to dead or outbreaks of group A streptococcus infections from contaminated curtains 14,15.

As key healthcare-associated pathogens have the capacity to persist for weeks to months on hospital surfaces indirect transmission is a serious threat, especially as antimicrobial resistance increases. Hospitalization in a room in which the previous patient had been colonized or infected with nosocomial pathogens (e.g. MRSA, VRE, multidrug-resistant Acinetobacter, Pseudomonas or C. difficile) has been shown to be a risk factor for colonization of infection with the same pathogen for the next patient16. Furthermore, the most important risk factor for hand and glove contamination of healthcare workers with multidrug-resistant bacteria has been demonstrated to be positive environmental cultures 17. To decrease the frequency and level of contamination of environmental surfaces the Centre for Disease Control and Prevention recommends routine disinfection of medical equipment and environmental surfaces to prevent the spread of potential pathogens through the hospital ward or ICU 18. Improved room cleaning has shown to decrease the risk for MRSA, VRE and C. difficile acquisition. Unfortunately, environmental cleaning is frequently inadequate. Less than 50% of hospital room surfaces are adequately cleaned and disinfected even by environmental services personnel. Environmental services personnel have low wages, are under time pressure to clean rooms quickly with high turn-over rates of patients. Novel materials and cleaning technologies have been developed as ultraviolet germicidal irradiation (UVGI) or hydrogen peroxide vapor (HPV). However, both technologies are expensive and can just be used for terminal cleaning and not during routine daily care 16. Self-disinfecting surfaces may overcome these problems. Once applied antimicrobial surfaces will continuously reduce the bioburden of nosocomial pathogens preventing transmission and decrease HAIs.

MVX One of these self-disinfecting products is MVX. MVX contains titanium dioxide which by the use of nanotechnology is now available for use in the health sector. Working as a photocatalyticum it generates, in the presence of light, hydroxy radicals and oxygen radicals for at least five years after coating hospital surfaces (durability test TUV Rheinland). Laboratory tests show that MVX is effective in killing bacteria, viruses and fungi (see attachment 1 for summary test results).

The positive results reported on the effects of MVX from laboratory evaluations still have to be confirmed in the clinical setting. After getting the CE-marking Gelderse Vallei Hospital in Ede, the Netherlands, will be the first hospital in Europe to study the efficacy of MVX in the Intensive Care Unit (ICU).

Conditions

• Environmental Contamination

Interventions

OTHER

MVX (titanium dioxide)

The investigators have designed a prospective pre-post evaluation time-based pilot study addressing the microbial colonization of surfaces in four rooms of the ICU before and after coating with titanium dioxide (MVX). During a pre-intervention period cultures will be taken every 7 days from 10 prespecified and marked sites per room for a total duration of 4 weeks (sink, wall, floor, bed rail, door handle, ceiling, keyboard patient room, nurse call button, bedside table and monitor arm). After coating of the rooms with MVX another 4 weeks observation period will be used to gather samples in the post-intervention period.

Sponsors & Collaborators

• drs. B. de Jong

  lead OTHER

Principal Investigators

• Arthur van Zanten, MD, PhD · Gelderse Vallei Hospital

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2015-03-31

Primary Completion

2015-07-31

Completion

2016-05-31

Countries

• Netherlands

Study Locations