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dear colleagues:
i would like to ask ,is it possible to decontaminate the filters including the hepa filters of the safety cabinet used in c&s by formaldehyde and phenol ?

 
SIMON KIREMERWA
Replied at 4:58 AM, 7 Aug 2012

Formaldehyde yes but take extreme caution when using it.
Phenol not encouraged because it forms deposits on the filters and is
corrosive in the long run
Check the WHO laboratory biosafety manual
On Aug 7, 2012 3:06 AM, "GHDonline (amal salah eldin)" <>
wrote:

> amal salah eldin added a new discussion to the TB Infection Control
> community.
>
> Title: TB infection control decontamination of safty cabinet
>
> Discussion contents:
> "dear colleagues:
> i would like to ask ,is it possible to decontaminate the filters including
> the hepa filters of the safety cabinet used in c&s by formaldehyde and
> phenol ?"
>
> --
> View this post online:
> <
> http://www.ghdonline.org/ic/discussion/tb-infection-control-decontamination-o...
> >
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Edward Nardell, MD
Replied at 9:19 AM, 7 Aug 2012

I would just add that for Mycobacterium tuberculosis on filters,
decontamination is really not needed. A NIOSH-funded study was done at
Harvard School of Health some years ago (authors include Ko First and
Rudnick, J of Am Biological Safety Association, 312:65-78, 1998 )
showing that myobacteria on HEPA filters die off quite quickly due to
air flow (unable to culture after 48 hrs). Moreover, when on
surfaces, organisms are extre difficult to remove as respirable-size
particles.

Ed

On Tue, Aug 7, 2012 at 4:58 AM, GHDonline (SIMON KIREMERWA)
<> wrote:
> SIMON KIREMERWA replied to the discussion "TB infection control decontamination of safty cabinet" in the TB Infection Control community.
>
> Reply contents:
> "Formaldehyde yes but take extreme caution when using it.
> Phenol not encouraged because it forms deposits on the filters and is
> corrosive in the long run
> Check the WHO laboratory biosafety manual
> On Aug 7, 2012 3:06 AM, "GHDonline (amal salah eldin)" <>
> wrote:
>
>> amal salah eldin added a new discussion to the TB Infection Control
>> community.
>>
>> Title: TB infection control decontamination of safty cabinet
>>
>> Discussion contents:
>> "dear colleagues:
>> i would like to ask ,is it possible to decontaminate the filters including
>> the hepa filters of the safety cabinet used in c&s by formaldehyde and
>> phenol ?"
>>
>> --
>> View this post online:
>> <
>> http://www.ghdonline.org/ic/discussion/tb-infection-control-decontamination-o...
>> >
>>
>> Unsubscribe or change your email notification settings:
>> <http://www.ghdonline.org/users/simon-kiremerwa/edit/>
>>
>> Contact the GHDonline team:
>> <http://www.ghdonline.org/contact/>
>>
>> You can reply to this discussion by responding directly to this e-mail; it
>> will be shared with all community members and posted as is. Files cannot be
>> added via email attachment and must be uploaded directly to GHDonline.
>>
>>"
>
> --
> View this post online:
> <http://www.ghdonline.org/ic/discussion/tb-infection-control-decontamination-o...>
>
> Unsubscribe or change your email notification settings:
> <http://www.ghdonline.org/users/edward-nardell-md/edit/>
>
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Grigory Volchenkov, MD
Replied at 1:06 PM, 7 Aug 2012

Dear Amal,

I would recommend you to check EN 12469:2000 (annex J) or NSF49-2011 (annex G) standards (both ones can be found at www.standards.nsf.org).

Formaldehyde is still probably the most widely used for Biological Safety Cabinets and HEPA filters decontamination. Phenol is not recommended.

Regards,

Grigory

Dr. Grigory V. VolchenkovĀ 

Chief Doctor
Vladimir Oblast TB Dispansery

Sudogodskoe shosse, 63
Vladimir 600023 RUSSIA

phone/fax work: +7(4922)323265
mobile +7 9206253227; +7 9190189226

PPlease don't print this e-mail unless you really need to. Thank you!



>________________________________
> From: GHDonline (amal salah eldin) <>
>To: "Grigory Volchenkov, MD" <>
>Sent: Monday, August 6, 2012 8:06 PM
>Subject: [TB Infection Control] TB infection control decontamination of safty cabinet
>
>amal salah eldin added a new discussion to the TB Infection Control community.
>
>Title: TB infection control decontamination of safty cabinet
>
>Discussion contents:
>"dear colleagues:
>i would like to ask ,is it possible to decontaminate the filters including the hepa filters of the safety cabinet used in c&s by formaldehyde and phenol ?"
>
>--
>View this post online:
><http://www.ghdonline.org/ic/discussion/tb-infection-control-decontamination-of-safty-cabi/?id=10289&format=text&type=instant>
>
>Unsubscribe or change your email notification settings:
><http://www.ghdonline.org/users/grigory-volchenkov/edit/>
>
>Contact the GHDonline team:
><http://www.ghdonline.org/contact/>
>
>You can reply to this discussion by responding directly to this e-mail; it will be shared with all community members and posted as is. Files cannot be added via email attachment and must be uploaded directly to GHDonline.
>
>
>
>

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