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M94A2665.TXT
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Document 2665
DOCN M94A2665
TI Potential applications of an HIV-1 PCR procedure in a diagnostic testing
laboratory algorithm--results of a prospective study.
DT 9412
AU Fearon M; Galli R; Major C; Read S; Gomez P; Ontario Ministry of Health
Laboratory, Toronto, Canada.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):252 (abstract no. PB0438). Unique
Identifier : AIDSLINE ICA10/94369910
AB OBJECTIVE: To evaluate the potential of the Roche Amplicor HIV-1 PCR kit
for use as a supplemental laboratory procedure in a diagnostic testing
algorithm. METHODS: Fresh whole blood specimens were collected in
acid-citrate-dextrose (ACD) tubes from: 387 patients at risk for
infection; 44 patients with previous indeterminate serology; and 42
infants born to seropositive mothers. Lymphocyte pellets were prepared
from each sample for PCR testing, according to established protocols,
and remaining plasma portions were tested for HIV-1 and HIV-2 antibodies
using a peptide EIA (Detect HIV, BioChem Pharma) and in-house Western
Blot (WB). In addition, whole blood virus culture and p24Ag testing were
carried out on selected specimens. RESULTS: Of the 387 specimens from
patients at risk for HIV infection, specific HIV-1 DNA was detected by
the Amplicor PCR kit in 69 specimens. Plasma fractions were reactive for
HIV-1 antibodies on all 69 samples as well. The remaining 318 patients
were negative for HIV antibodies, with no proviral DNA detected. Of the
44 patients with previous indeterminate serology, 2 were positive by PCR
and serology on the follow-up sample (ie. seroconversion), 1 of which
was also culture positive. There was 100% concordance between PCR and
culture for the 42 samples from infants born to seropositive mothers (11
+ by PCR and culture, 31 negative by both). CONCLUSIONS: There were no
observed false positive or negative PCR results amongst the 473
specimens in this study. The Amplicor PCR kit has potential for use as a
supplemental test in a diagnostic testing algorithm to resolve
indeterminate WB, to provide evidence of vertical transmission of HIV,
and possibly for determination of early infection in seronegative
high-risk individuals.
DE Adult *Algorithms AIDS Serodiagnosis/*METHODS Blotting, Western
Female Human HIV Seropositivity/*DIAGNOSIS/IMMUNOLOGY
*HIV-1/IMMUNOLOGY HIV-2/IMMUNOLOGY Immunoenzyme Techniques Infant,
Newborn Male Polymerase Chain Reaction/*METHODS Predictive Value of
Tests Pregnancy Prospective Studies MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).