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Postexposure
Prophylaxis for Human Immunodeficiency Virus Infection after Sexual
or Injection Drug Use Exposure: Identification and Characterization
of the Source of Exposure [Roland ME et al. JID 2001;184:1608]
The authors
from San Francisco report their experience with non-occupational
post-exposure prophylaxis. Among 401 patients, there were 64 (16%)
who recruited a source subject. Of these 64 source subjects, 69%
were currently using antiretroviral drugs and 46% had sufficient
viral loads for resistance testing. All treatment naïve subjects
had wild-type virus that was pan-sensitive. Resistance was detected
in many of these subjects receiving antiretroviral drugs and this
generally correlated with the drugs being taken. The authors conclude
that the history of antiretroviral drugs from source patients can
be used to predict drug resistance in the selection of a postexposure
prophylaxis regimen.
Comment: These results should be anticipated, but it is nice
to see them confirmed. The conclusions would appear to be applicable
to both occupational and non-occupational HIV exposures. Resistance
can obviously not be verified in patients with low viral loads,
but this is a setting in which transmission is probably unlikely.
posted
1/14/2002

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