Faculty Collaboration Database

Effect of preanalytical processing of ThinPrep specimens on detection of high-risk human papillomavirus by the Aptima HPV assay. J Clin Microbiol 2014 May;52(5):1448-52

Date

02/21/2014

Pubmed ID

24554753

Pubmed Central ID

PMC3993670

DOI

10.1128/JCM.03624-13

Scopus ID

2-s2.0-84899570644 (requires institutional sign-in at Scopus site)   7 Citations

Abstract

Two important preanalytical protocols performed on liquid-based cytological specimens, namely, automated cytology processing and glacial acetic acid (GAA) treatment, may occur prior to the arrival of specimens in a molecular diagnostics laboratory. Ninety-two ThinPrep vials previously positive for high-risk human papillomavirus (HPV) via the Cervista HPV HR test were preselected and alternated with 92 previously negative ThinPrep vials. The specimen set was processed in a consecutive fashion by an automated cytology processor without fastidious decontamination precautions. Carryover potential was subsequently assessed by performance of the Aptima HPV assay on aliquots from reprocessed ThinPrep vials. All previously negative ThinPrep vials yielded a negative result following routine automated cytology processing, despite close proximity to known-positive ThinPrep vials. In separate experiments, aliquots from 236 ThinPrep vials were forwarded for tandem analysis with and without GAA treatment. Data from GAA- and mock-treated specimens generated by Aptima HPV were compared to correlate data generated by Cervista. A 99.2% concordance of Aptima HPV results from GAA-treated and mock-treated specimens was noted. This result differed from the concordance result derived from Cervista (91.5%; P<0.0002). Of the initially positive Cervista results, 21.9% reverted to negative following GAA treatment; the correlate value was 2.7% for Aptima HPV (P=0.01). While deleterious effects of GAA treatment on genomic DNA were noted with Cervista (P=0.0015), GAA treatment had no significant effects on Aptima HPV specimen signal/cutoff ratios or amplification of internal control RNA (P≥0.07). The validity of an Aptima HPV result is independent of GAA treatment and routine automated cytology processing.

Author List

Munson E, Schroeder ER, Ross KC, Yauck C, Bieganski T, Amrhein RD, Napierala M, Harkins AL

Author

April Harkins PhD Assistant Professor in the Clinical Laboratory Science department at Marquette University

MESH terms used to index this publication - Major topics in bold

Acetic Acid
Female
Humans
Molecular Diagnostic Techniques
Papillomaviridae
Papillomavirus Infections
Prospective Studies
Specimen Handling
Vaginal Smears