The Acceptability and Validity of Self-collected Nasal Swabs for Detection of Influenza Virus Infection Among Older Adults in Thailand

Overview

Journal Influenza Other Respir Viruses

Publisher Wiley

Specialty Microbiology

Date 2017 Jul 26

PMID 28741903

Citations 20

Authors

Sonal Goyal

Kriengkrai Prasert

Prabda Praphasiri

Malinee Chittaganpitch

Sunthareeya Waicharoen

Darunee Ditsungnoen

Siriluk Jaichuang

Kim A Lindblade

Affiliations

Soon will be listed here.

Abstract

Background: Self-collection of nasal swabs could improve the timeliness of influenza virus detection in older adults.

Objectives: Measure the acceptability, adequacy, timeliness, and validity of self-collected nasal swabs among adults >65 years in Thailand.

Methods: Our evaluation consisted of two parts: a one-month study among randomly selected, community-dwelling older adults to simulate community-based surveillance for acute respiratory infections (ARI); and a clinic study of older adults with ARI to evaluate the sensitivity and specificity of self-collected nasal swabs for influenza virus infection compared with healthcare worker (HCW)-collected nasal and nasopharyngeal swabs.

Results: In the community study, 24% of participants experienced an ARI during the observation period. All (100%) participants with an ARI self-collected nasal swabs within 72 hours of symptom onset of which 92% were considered adequate samples. In the clinic study, 45% of patients with ARI presented within 72 hours of symptom onset. The sensitivity of self-collected nasal swabs for detection of influenza virus infection was 78% (95% CI 40-97) compared to nasopharyngeal and 88% (95% CI 47-100) compared to nasal swabs collected by HCWs. Specificity was 100% (95% CI 97-100) compared to both methods. Self-collection of nasal swabs was found acceptable by 99% of participants in both studies.

Conclusions: Self-collection of nasal swabs was acceptable to older adults in Thailand who were able to take adequate samples. Self-collection of nasal swabs may improve the timeliness of sample collection but lower sensitivity will need to be considered.

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