Post on 27-Sep-2020
Washington DC Hospital Study
Twelve month analysis of microbial contamina=on within a Neonatal Intensive Care Unit – Pre and Post
installa=on of Ultra Violet Germicidal Irradia=on system in the NICU HVAC
*Unpublished data
Study Sample Loca=ons
Qualita=ve & quan=ta=ve environmental samples collected from: HVAC cooling coils, condensate drain pans and final filters
NICU Supply air grilles, return air grilles and sinks
WDCH Study Results
Microorganisms isolated from WDCH NICU Environment
GUH NICU HVAC Surfaces- AHU-2: Bacteria & Fungi
8/8/2007 Pre UVGI
9/5/2008 Pre UVGI
2/4/2009 Post UVGI
3/31/2009 Post UVGI5/29/2009Post UVGI 2/10/2010
Post UVGI
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
1 2 3 4 5 6
Sample Date
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.WDCH NICU HVAC Surfaces – AHU-‐2: Bacteria & Fungi
10/6/2008 Pre UVGI
3/31/2009 Post UVGI2/10/10 Post UVGI
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.
1 2 3Sample Date
GUH NICU Environment- SA Grille: Bacteria & FungiWDCH NICU Environment – SA Grille: Bacteria & Fungi
10/6/2008 Pre UVGI
3/31/2009 Post UVGI 2/10/2010 Post UVGI
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.
1 2 3Sample Date
GUH NICU Environment- RA Grille: Bacteria & FungiWDCH NICU Environment – RA Grille: Bacteria & Fungi
10/6/08 Pre UVGI
3/31/09 Post UVGI
2/10/10 Post UVGI
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.
1 2 3Sample Date
GUH NICU Environment- Sinks: Bacteria & FungiWDCH NICU Environment – Sinks: Bacteria & Fungi
Comparison of WDCH pre and post data to Women and Children’s Hospital of Buffalo pre and post
data
Similar Microorganisms Cultured from NICU Environments
Environmental Samples – NICU HVAC
WDCH WCHOB
GUH NICU HVAC Surfaces- AHU-2: Bacteria & Fungi
8/8/2007 Pre UVGI
9/5/2008 Pre UVGI
2/4/2009 Post UVGI
3/31/2009 Post UVGI5/29/2009Post UVGI 2/10/2010
Post UVGI
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
1 2 3 4 5 6
Sample Date
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.
NICU HVAC Surfaces – AHU-‐2: Bacteria & Fungi
Environmental Samples – NICU Air Diffusers
WDCH WCHOB
10/6/2008 Pre UVGI
3/31/2009 Post UVGI2/10/10 Post UVGI
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
Avg
. Mic
roor
gani
sms
CFU
/SQ
. IN
.
1 2 3Sample Date
GUH NICU Environment- SA Grille: Bacteria & FungiNICU Environment – SA Grille: Bacteria & Fungi
WCHOB Hospital Costs
Conclusions from Women and Children’s Hospital of Buffalo Study
Most problema=c bacteria related to Hospital Acquired Infec=ons were isolated in HVAC and NICU air grilles: Acinetobacter, Pseudomonas, Staphylococcus
HVAC microbial contamina=on (Bacteria and Fungi) was reduced by a factor of > 5 Logs
Reduced Ven=lator Associated Pneumonia (VAP)
Reduced an=microbial use
Reduced an=microbial resistance
Reduced morbidity and mortality
Reduced Hospital direct costs > $800,000/annum
.
Conclusions from Washington DC Hospital Study
Most problema=c bacteria related to Hospital Acquired Infec=ons were isolated in HVAC and NICU air grilles: Acinetobacter, Pseudomonas, Staphylococcus
HVAC microbial contamina=on (Bacteria and Fungi) was reduced by a factor of > 5 Logs
NICU air diffuser microbial contamina=on was reduced by a factor of >5 Logs
NICU Chief has indicated NICU infec=ons are drama=cally down with 0 VAP (Ven=lator Associated Pneumonia) infec=ons reported in past 27 months