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1996-02-27
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Document 0429
DOCN M9630429
TI Effect of specimen storage on absolute CD4 counts.
DT 9603
AU Kabengera S; Hom D; Jackson B; Uganda Cancer Institute, Kampala, Uganda.
SO Clin Diagn Lab Immunol. 1994 Mar;1(2):232-4. Unique Identifier :
AIDSLINE MED/96050812
AB We have evaluated the effect of specimen storage on absolute CD4 counts
by a commercially available manual assay. This assay utilizes latex
particles coated with CD4 monoclonal antibodies that are mixed with
lymphocytes in whole blood. Thirty blood samples were analyzed on days
1, 2, 4, and 7 postcollection. Linear regression analysis and Pearson
correlation coefficients were used to determine the relationship between
the absolute CD4 count and the storage time after sample collection.
There was a significant decrease in absolute CD4 counts from baseline
over time, dropping 3.6% at day 2, 10.1% at day 4, and 18.8% at day 7.
However, the standard error of the B coefficient was constant [SE (B) =
0.031] up to day 4, indicating that reliable estimates of the baseline
CD4 counts could be made from the CD4 counts determined up to day 4 from
the time of sample collection. In addition to being sample, rapid, and
inexpensive, the manual assay is capable of giving a reliable absolute
CD4 count after specimen storage of up to 4 days. The application of
this assay in the limited facilities of developing countries'
laboratories is attractive.
DE *Blood Specimen Collection *CD4 Lymphocyte Count/METHODS Human
*Preservation, Biological Reference Values Reproducibility of Results
Specimen Handling/ADVERSE EFFECTS Support, U.S. Gov't, P.H.S.
Temperature Time Factors JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).