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  • Title: Analysis of the results of the SEIMC External Quality Control Programme for HIV-1, HCV, and HBV viral loads. Year 2016.
    Author: Orta Mira N, Del Remedio Guna Serrano M, Carlos Latorre Martínez J, Ruiz de Gopegui E, Rosario Ovies M, Poveda M, Gimeno Cardona YC.
    Journal: Enferm Infecc Microbiol Clin (Engl Ed); 2019 May; 37 Suppl 1():9-14. PubMed ID: 31138424.
    Abstract:
    BACKGROUND: Human immunodeficiency virus type 1 (HIV-1) and hepatitis B (HBV) and C virus (HCV) viral load determinations are among the most important markers for the follow-up of patients infected with these viruses. Microbiology laboratories have a variety of tools to ensure the accuracy of the results obtained, including external quality control programmes such as that of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC). This article summarises the results of the 2016 SEIMC External Quality Control Programme for HIV-1, HCV, and HBV viral loads. METHODS AND RESULTS: In the HIV-1 programme, a total of 5 standards were sent. One standard consisted of seronegative human plasma, while the remaining 4 contained plasma from 3 different viremic patients, in the range of 2-5 log10 copies/mL. A significant proportion of the laboratories (40% on average) obtained values out of the accepted range (mean ± 0.25 log10 copies/mL), depending on the standard and on the method used for quantification. The HBV and HCV programme consisted of 2 standards with different viral load contents. Most of the participants, 86.5% in the case of HCV and 85.6% in the case of HBV, obtained results that were all within the accepted range (mean ± 1.96 SD log10 UI/mL). CONCLUSIONS: Data from this analysis reinforce the utility of proficiency programmes to ensure the quality of the results obtained by a particular laboratory. Due to the marked interlaboratory variability, it is advisable to use the same method and the same laboratory for patient follow-up. Supplement information: This article is part of a supplement entitled «SEIMC External Quality Control Programme. Year 2016», which is sponsored by Roche, Vircell Microbiologists, Abbott Molecular and Francisco Soria Melguizo, S.A. © 2019 Elsevier España, S.L.U. and Sociedad Española de Enfermedades Infecciosas y Microbiología Clínica. All rights reserved.
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