viability of tuberculosis bacteria

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From:Bob Bacon <> (by way of histonet)
To:histonet <>
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Hi all:
We receive primate specimens in our research lab at the University of
Missouri Veterinary Patho-Biology Lab that is often sent to us and is
often infected with Tuberculosis. My question is how effective is
formalin in killing tuberculosis bacteria and how long should we fix the
tissue to ensure that the organism is non-infectious.  We've been
flagging the specimens for 3 days to insure that they are well fixed
before processing and cutting?  Is this necessary?  Our client would
like faster turn around time?  Whats the consensus out there?
Bob Bacon  HT ASCP
Dept of Veterinary Pathology
University of Missouri

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