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- Path: sparky!uunet!gatech!ncar!hsdndev!enterprise.bih.harvard.edu!rind
- From: rind@enterprise.bih.harvard.edu (David Rind)
- Newsgroups: sci.med
- Subject: Re: TB Skin Test
- Message-ID: <2446@hsdndev.UUCP>
- Date: 24 Jan 93 04:23:19 GMT
- Sender: usenet@hsdndev.UUCP
- Organization: Beth Israel Hospital, Harvard Medical School, Boston Mass., USA
- Lines: 16
-
- In article <C13B9z.ItD@panix.com> dannyb@panix.com (Daniel Burstein) writes:
- >so, in short, this is a SCREENING exam. If it is negative (i.e. no
-
- Under the usual definition of a screening exam, this is not really
- true. A screening exam is usually a test performed on asymptomatic
- individuals looking for disease. Certainly a PPD is often used this
- way, but it is also frequently used as a diagnostic test in
- symptomatic individuals or those who have been exposed to Tb.
-
- The fact that a test may have poor operating characteristics with
- high rates of false negatives and/or false posititives and thus
- requires confirmatory testing does not make it a screening exam
- per se.
- --
- David Rind
- rind@binoc.bih.harvard.edu
-