Search

Showing total 2 results
Start Over Journal vaccine
2 results

1. A paper-based immunoassay to determine HPV vaccination status at the point-of-care.

Author

Grant BD, Smith CA, Castle PE, Scheurer ME, and Richards-Kortum R

Subjects
Adult, Antigens, Viral immunology, Collodion, Female, Humans, Immunoassay instrumentation, Male, Paper, Pilot Projects, Vaccination, Young Adult, Antibodies, Viral blood, Human papillomavirus 16 immunology, Immunoassay methods, Papillomavirus Infections immunology, Papillomavirus Vaccines immunology, Point-of-Care Systems
Abstract

Objective: To develop and evaluate a paper-based point-of-care HPV serology test to determine if an individual has received two or more HPV immunizations., Methods: The paper-based immunoassay was constructed using a nitrocellulose lateral flow strip with adsorbed HPV16 virus-like particles serving as the capturing moiety. Three capture zones containing virus-like particles were placed in series to allow for visual discrimination between high and low HPV16 plasma antibody concentrations. A plasma separation membrane was used to allow whole blood to be applied directly to the assay. All reagents were dried on glass fiber pads during device fabrication and were rehydrated with buffer at the time of use. A pilot study consisting of 35 subjects with a history of zero, one, two or three HPV vaccines was conducted to evaluate the immunoassay. The completed paper-based immunoassays were scanned for visual interpretation by three researchers who were blinded to the true results and separately evaluated quantitatively using MATLAB., Results: For the 28 tests valid for analysis, fifteen subjects reported receiving two or more HPV vaccines, three reported receiving one, and ten reported having no HPV vaccinations. The paper-based immunoassays for all fifteen subjects who reported having received two or more HPV vaccines were judged positive by all researchers. Twelve of the thirteen tests from individuals reporting one or zero vaccinations were deemed negative by all observers. One test from an unvaccinated individual was judged positive by two out of three reviewers. Quantitatively, all tests were correctly separated between the two groups., Conclusions: We successfully designed and tested a HPV serology test amenable to the point-of-care. The device showed promising results in a pilot study for discriminating between those who received two or more HPV vaccinations and those who did not. Furthermore, this device offers a platform for producing other semi-quantitative point-of-care serological tests., (Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Published
2016
Full Text
View/download PDF

2. A paper-based immunoassay to determine HPV vaccination status at the point-of-care

Author

Philip E. Castle, Michael E. Scheurer, Chelsey A. Smith, Benjamin D. Grant, and Rebecca Richards-Kortum

Subjects
Adult, Male, Paper, medicine.medical_specialty, HPV, Point-of-care testing, Point-of-Care Systems, Serologic tests, Pilot Projects, HPV vaccines, Antibodies, Viral, Article, Serology, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Internal medicine, Immunology and Microbiology(all), medicine, Humans, 030212 general & internal medicine, Papillomavirus Vaccines, Antigens, Viral, Point of care, Immunoassay, Human papillomavirus 16, General Veterinary, General Immunology and Microbiology, medicine.diagnostic_test, business.industry, Papillomavirus Infections, Vaccination, Public Health, Environmental and Occupational Health, Hpv vaccination, Collodion, Paper based, veterinary(all), 3. Good health, Infectious Diseases, 030220 oncology & carcinogenesis, Immunology, Molecular Medicine, Female, business
Abstract

Objective To develop and evaluate a paper-based point-of-care HPV serology test to determine if an individual has received two or more HPV immunizations. Methods The paper-based immunoassay was constructed using a nitrocellulose lateral flow strip with adsorbed HPV16 virus-like particles serving as the capturing moiety. Three capture zones containing virus-like particles were placed in series to allow for visual discrimination between high and low HPV16 plasma antibody concentrations. A plasma separation membrane was used to allow whole blood to be applied directly to the assay. All reagents were dried on glass fiber pads during device fabrication and were rehydrated with buffer at the time of use. A pilot study consisting of 35 subjects with a history of zero, one, two or three HPV vaccines was conducted to evaluate the immunoassay. The completed paper-based immunoassays were scanned for visual interpretation by three researchers who were blinded to the true results and separately evaluated quantitatively using MATLAB. Results For the 28 tests valid for analysis, fifteen subjects reported receiving two or more HPV vaccines, three reported receiving one, and ten reported having no HPV vaccinations. The paper-based immunoassays for all fifteen subjects who reported having received two or more HPV vaccines were judged positive by all researchers. Twelve of the thirteen tests from individuals reporting one or zero vaccinations were deemed negative by all observers. One test from an unvaccinated individual was judged positive by two out of three reviewers. Quantitatively, all tests were correctly separated between the two groups. Conclusions We successfully designed and tested a HPV serology test amenable to the point-of-care. The device showed promising results in a pilot study for discriminating between those who received two or more HPV vaccinations and those who did not. Furthermore, this device offers a platform for producing other semi-quantitative point-of-care serological tests.

Full Text
View/download PDF