Tag Archives: UV-C disinfection

UV Room Disinfection: Scientific Evidence in Eliminating Healthcare-Associated Infections Worldwide

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Tuesday, April 21st: UV Room Disinfection: Scientific Evidence in Eliminating Healthcare Associated Infections Worldwide

Listen in at 11:00 a.m. Pacific , 2 pm Eastern time

http://www.voiceamerica.com/episode/84813/uv-room-disinfection-scientific-evidence-in-eliminating-healthcare-associated-infections-worldwide

Guests:  Dr. Mark Stibich, PhD, is Chief Scientific Officer & Co-founder, Xenex. and
Ms. Sarah Simmons, MPH CIC, is Science Director, Xenex

Dr. Stibich and Ms. Simmons will discuss UV Room Disinfection, how pulsed UV disinfection works, the pulsed Xenon UV (PX-UV) difference, and the effectiveness against endospores like
C. diff.
and bacillus strains and the scientific evidence in eliminating
Healthcare-Associated Infections worldwide.

Dr. Mark Stibich, PhD, Chief Scientific Officer & Co-founder, Xenex
Dr. Stibich is a founder of Xenex and, as its Chief Scientific Officer, he oversees scientific research, product development, facility assessments, and protocol design. He leads new technology development and is an inventor on multiple patents. Dr. Stibich meets frequently with infection prevention representatives at healthcare facilities, helping them understand and solve their infection control challenges while analyzing hospital results. Dr. Stibich holds a doctoral degree from the Johns Hopkins University School of Public Health, a Masters in Health Science, also from Johns Hopkins, and a bachelor’s degree from Yale University. He has conducted research in Russia, Tajikistan, Afghanistan, South Africa, Kenya, the United States and Brazil.

Ms. Sarah Simmons,  Science Director, Xenex
As an epidemiologist, Sarah Simmons works with customers to implement Xenex’s pulsed xenon UV light room disinfection technology in their facility, provide support for customers’ Infection Prevention departments, and evaluate their infection reduction results for publication in scientific journals. Sarah worked as an Infection Preventionist for five years in San Antonio, with a focus on infection prevention in critical care. She is a member of the San Antonio APIC chapter and has served on the board in numerous roles. Sarah is a Doctoral Candidate at the University of Texas School of Public Health, has a Masters of Public Health in Epidemiology and Biostatistics from the Texas A&M School of Rural Public Health, and a Bachelors degree in Biology from Texas A&M University.

 

Evaluation of a Pulsed Xenon Ultraviolet (PX-UV) Disinfection System for Reduction of Healthcare-Associated Pathogens in Hospital Rooms

“Evaluation of a Pulsed Xenon Ultraviolet (PX-UV) Disinfection System for Reduction of Healthcare-Associated Pathogens in Hospital Rooms”

A study conducted by Dr. Curtis Donskey, and a team of researchers with the objective to determine the effectiveness of pulsed xenon ultraviolet (PX-UV) disinfection device for reduction in recovery of healthcare-associated pathogens was recently published in Infection Control & Hospital Epidemiology (ICHE).

Michelle M. Nerandzica1 c1, Priyaleela Thotaa2, Thriveen Sankar C.a2, Annette Jencsona1, Jennifer L. Cadnuma2, Amy J. Raya2a3, Robert A. Salataa2a3, Richard R. Watkinsa4 and Curtis J. Donskeya2a3a5

a1 Research Service, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio

a2 Case Western Reserve University School of Medicine, Cleveland, Ohio

a3 Department of Medicine, University Hospitals Case Medical Center, Cleveland, Ohio

a4 Akron General Medical Center, Akron, Ohio

a5 Geriatric Research, Education and Clinical Center, Cleveland Veterans Affairs Medical Center, Cleveland, Ohio

Abstract

OBJECTIVE To determine the effectiveness of a pulsed xenon ultraviolet (PX-UV) disinfection device for reduction in recovery of healthcare-associated pathogens.

SETTING Two acute-care hospitals.

METHODS We examined the effectiveness of PX-UV for killing of Clostridium difficile spores, methicillin-resistant Staphylococcus aureus (MRSA), and vancomycin-resistant Enterococcus (VRE) on glass carriers and evaluated the impact of pathogen concentration, distance from the device, organic load, and shading from the direct field of radiation on killing efficacy. We compared the effectiveness of PX-UV and ultraviolet-C (UV-C) irradiation, each delivered for 10 minutes at 4 feet. In hospital rooms, the frequency of native pathogen contamination on high-touch surfaces was assessed before and after 10 minutes of PX-UV irradiation.

RESULTS On carriers, irradiation delivered for 10 minutes at 4 feet from the PX-UV device reduced recovery of C. difficile spores, MRSA, and VRE by 0.55±0.34, 1.85±0.49, and 0.6±0.25 log10 colony-forming units (CFU)/cm2, respectively. Increasing distance from the PX-UV device dramatically reduced killing efficacy, whereas pathogen concentration, organic load, and shading did not. Continuous UV-C achieved significantly greater log10CFU reductions than PX-UV irradiation on glass carriers. On frequently touched surfaces, PX-UV significantly reduced the frequency of positive C. difficile, VRE, and MRSA culture results.

CONCLUSIONS The PX-UV device reduced recovery of MRSA, C. difficile, and VRE on glass carriers and on frequently touched surfaces in hospital rooms with a 10-minute UV exposure time. PX-UV was not more effective than continuous UV-C in reducing pathogen recovery on glass slides, suggesting that both forms of UV have some effectiveness at relatively short exposure times.

Infect Control Hosp Epidemiol 2014;00(0): 1–6

(Received July 11 2014)

(Accepted October 14 2014)

To access the report in its entirety please click on the following link:

http://dx.doi.org/10.1017/ice.2014.36