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J Acquir Immune Defic Syndr. 2014 Sep 1;67(1):e1-4. doi: 10.1097/QAI.0000000000000250.

Accurate early infant HIV diagnosis in primary health clinics using a point-of-care nucleic acid test.

Author information

1
*Instituto Nacional da Saúde, Maputo, Mozambique; †Clinton Health Access Initiative, Maputo, Mozambique; and ‡Department of Mathematics and Informatics, Universidade Eduardo Mondlane, Maputo, Mozambique.

Abstract

OBJECTIVE:

To evaluate the accuracy of a point-of-care (POC) nucleic acid-based test (NAT) for early infant HIV diagnosis (EID) in primary health clinics in Mozambique.

METHODS:

POC and laboratory NAT EID tests were conducted on matched blood samples collected from 827 HIV-exposed infants younger than 18 months who were enrolled consecutively at 4 periurban primary health clinics and the central hospital in Maputo. Lancet heel draw blood collected by nurses was tested on site for HIV-1/-2 RNA on the Alere HIV NAT POC device and also used to create dried blood spots for later laboratory EID testing on the Roche Cobas Taqman/Ampliprep instrument. Results were used to determine the sensitivity, specificity, and agreement between the POC and laboratory NAT EID tests.

RESULTS:

The sensitivity and specificity of POC NAT EID testing were 98·5% (95% confidence interval (CI): 91.7 to 99.9, n = 65) and 99·9% (95% CI: 99.3 to 100, n = 762), respectively, compared with laboratory EID tests. Overall agreement was high (Cohen kappa = 0·981; 95% CI: 0.96 to 1.00). Positive (98·5%; 95% CI: 96·3 to 100) and negative 99.9% (95% CI: 99.7 to 100) test agreement was also high.

CONCLUSIONS:

Primary health care nurses accurately performed POC NAT EID testing within primary health care clinics. On-site nucleic acid-based EID testing is technically feasible in clinic settings and could be used in efforts to improve access to pediatric HIV antiretroviral treatment.

PMID:
24933096
DOI:
10.1097/QAI.0000000000000250
[Indexed for MEDLINE]

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