Background.
To improve
clinical and public health outcomes through early human immunodeficiency virus
(HIV) detection, fourth-generation antigen/antibody immunoassay (4IA) and
supplemental testing results must be returned rapidly.
Methods.
We examined
HIV testing data at Harborview Medical Center (HMC), Massachusetts General
Hospital (MGH), and the Medical University of South Carolina (MUSC), which used
4IA and supplemental antibody and nucleic acid tests (NATs). At MGH and MUSC,
HIV-1 Western blot (WB) and HIV-2 testing were conducted at a reference
laboratory. We compared time from specimen collection to laboratory result for
established (positive WB) and acute infections (reactive 4IA,
negative/indeterminate WB, detectable NAT), and we calculated testing cost per
positive-test result.
Results.
From 3731 (MUSC) to 19 774 (MGH) tests were
conducted; 0.01% (MGH) to 0.05% (HMC) were acute infections. Each laboratory
had reactive 4IA, WB-negative, or indeterminate specimens without NAT (ie,
potential acute infections). Time to result was 1.5 (HMC) to 5.2 days (MGH) for
acute and 1.0 (HMC) to 5.2 days (MGH) for established infections. Costs were
$1054 (MGH) to $1521 (MUSC).
Conclusions.
Conducting supplemental testing
in-house lowered turnaround times, which may be further reduced with rapid
HIV-1/HIV-2 differentiation tests. Hospitals may benefit from quantitative NATs
not requiring physician orders, so all potential acute infections receive NAT.
Below: HIV testing algorithm used at Massachusetts General Hospital and the Medical University of South Carolina
Below: HIV testing algorithm used by Harborview Medical Center
By: Wesolowski LG1, Nasrullah M1, Coombs RW2, Rosenberg E3, Ethridge SF1, Hutchinson AB1, Dragavon J4, Rychert J5, Nolte FS6, Madory JE6, Werner BG7.
- 1Division of HIV/AIDS Prevention , National Center for HIV, Hepatitis, STD & TB Prevention, Centers for Disease Control and Prevention , Atlanta, Georgia.
- 2Departments ofLaboratory Medicine; Medicine, Harborview Medical Center, Seattle, Washington.
- 3Departments ofMedicine; Pathology, Massachusetts General Hospital, Boston.
- 4Departments of Laboratory Medicine.
- 5Pathology , Massachusetts General Hospital , Boston.
- 6Department of Pathology and Laboratory Medicine , Medical University of South Carolina , Charleston.
- 7Bureau of Infectious Disease, Massachusetts Department of Public Health, Boston.
- Open Forum Infect Dis. 2015 Dec 9;3(1):ofv188. doi: 10.1093/ofid/ofv188. eCollection 2016.
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