title: Evaluation of the FTA carrier device for human papillomavirus testing in developing countries.
abstract: Liquid-based methods for the collection, transportation, and storage of cervical cells are cumbersome and expensive and involve laborious DNA extraction. An FTA cartridge is a solid carrier device, easier to handle and allowing simple DNA elution for human papillomavirus (HPV) testing. HPV-DNA results from cervical specimens collected in PreservCyt medium (Hologic, Inc.) and the indicating FTA elute cartridge were compared in an area where transportation and storage may affect the performance of the test. Cervical cells from 319 young adult women enrolled in the Costa Rica Vaccine Trial were collected by a nurse using a Cervex brush (Roberts), which was placed on the FTA cartridge and subsequently rinsed in 20 ml of PreservCyt medium. Two 0.5-ml PreservCyt aliquots were frozen for HPV-PCR testing; the FTA cartridges were kept at room temperature. HPV-DNA detection and typing was performed using SPF(10) PCR/DEIA (DNA enzyme immunoassay detection of amplimers)/LiPA(25) system. The percent agreement, agreement among positives, and kappas were estimated. Positivity was higher for FTA compared to PreservCyt specimens (54.5% versus 45.8%, P < 0.001). For oncogenic types, the overall agreement was 0.92, the agreement between positives was 0.74, and the kappa was 0.79. For individual HPV types, the overall agreement ranged from 0.97 to 1.00. We did not observe reduced cytology adequacy when specimen collection for cytology was preceded by FTA collection for HPV testing. HPV-DNA detection from FTA cartridges is broadly comparable to detection from PC medium. The higher HPV detection observed for FTA-collected specimens should be explored further. FTA cartridges could provide a simpler and more cost-effective method for cervical cell collection, storage, and transportation for HPV-DNA detection in research settings in developing countries.
authors.affiliation: Proyecto Epidemiológico Guanacaste, Fundación INCIENSA, Guanacaste, Costa Rica. pgonzalez@proyectoguanacaste.org
authors.forename: Paula
authors.initials: P
authors.lastname: Gonzalez
authors.forename: Bernal
authors.initials: B
authors.lastname: Cortes
authors.forename: Wim
authors.initials: W
authors.lastname: Quint
authors.forename: Aimée R
authors.initials: AR
authors.lastname: Kreimer
authors.forename: Carolina
authors.initials: C
authors.lastname: Porras
authors.forename: Ana Cecilia
authors.initials: AC
authors.lastname: Rodríguez
authors.forename: Silvia
authors.initials: S
authors.lastname: Jimenez
authors.forename: Rolando
authors.initials: R
authors.lastname: Herrero
authors.forename: Linda
authors.initials: L
authors.lastname: Struijk
authors.forename: Allan
authors.initials: A
authors.lastname: Hildesheim
authors.forename: Willem
authors.initials: W
authors.lastname: Melchers
mesh_terms: D000328:Adult; D019411:Clinical Laboratory Techniques / Q000379:methods*; D003364:Costa Rica; D004279:DNA, Viral / Q000235:genetics / Q000302:isolation & purification; D003906:Developing Countries; D004864:Equipment and Supplies; D005260:Female; D005838:Genotype; D006801:Humans; D027383:Papillomaviridae / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D030361:Papillomavirus Infections / Q000175:diagnosis*; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000379:methods*; D014773:Virology / Q000379:methods*; D055815:Young Adult
chemical_list: D004279:DNA, Viral