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Thank you to everyone who sent me information on and off list.
The controversy continues – I can tell you that there is certainly no consensus in what people are using for limits to their testing or even if we should be testing with air sampling in the first place.
The range of acceptable fungal CFU / cubic metre ranged from 0 to 35, with one document suggesting <500 and the bacterial count was between 0 – 500 as well.
The most common recommendations were 0cfu/m3 for fungi and 35 cfu/m3 for bacteria.
John – I agree a national standard would be excellent not only for the limits but more importantly should we do this testing in the first place?
Kind regards,
Fiona De Sousa
Infection Prevention & Control Coordinator
Sydney Adventist Hospital
Fiona.Desousa@sah.org.au
185 Fox Valley Road, Wahroonga, NSW, 2076
Dear Fiona
We also base our approach on Dharan
I did put together an approach on the WIKI – see http://hicsigwiki.asid.net.au/index.php?titleOperating_theatre_commissioning_-_Microbiological
It would be useful to agree a national standard for this!
Kind regards
John
Dr John Ferguson
Director, Infection Prevention & Control, Hunter New England Health
[http://www.health.nsw.gov.au/images/communications/e-signatures/images/NSW-Health-Hunter-New-England-LHD.jpg]
Dear Fiona,
Here at our institution, we are currently using this reference:
Dharan S, Pittet D. Environmental controls in operating theatres. J Hosp Infect. 2002 Jun;51(2):79-84.
http://www.ncbi.nlm.nih.gov/pubmed/12090793
Realising that it is very difficult to set and apply acceptable CFU limits, and there always will be an arbitrary component to this.
Best regards, Matthias.
—
Matthias Maiwald, MD, FRCPA
Consultant in Microbiology
Adj. Assoc. Prof., Natl. Univ. Singapore
Department of Pathology and Laboratory Medicine
KK Women’s and Children’s Hospital
100 Bukit Timah Road
Singapore 229899
Tel. +65 6394 8725 (Office)
Tel. +65 6394 1389 (Laboratory)
Fax +65 6394 1387
Dear members,
I know that air sampling in a new building is a contentious issue but we are currently undergoing it as part of the commissioning process for new operating theatres and one of the difficulties I face is people asking for the acceptable limit of certain organisms. Aside from fungal organisms I have been unable to find any references to guide me on specific organisms counts.
I would like to hear people’s views on the isolation of skin or environmental flora when doing this sampling – how many CFU would be acceptable per air sample ?
Fiona De Sousa
Infection Prevention & Control Coordinator
Sydney Adventist Hospital
Fiona.Desousa@sah.org.au
185 Fox Valley Road, Wahroonga, NSW, 2076
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