Detection of influenza virus in rectal swabs of patients admitted in hospital for febrile illnesses in Thailand

Introduction: Influenza virus favours the respiratory tract as its primary site of host entry and replication, and it is transmitted mainly via respiratory secretions. Nasopharyngeal swab is the gold standard specimen type for influenza detection, but several studies have also suggested that the vir...

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Bibliographic Details
Published in:	SAGE open medicine Vol. 9; p. 2050312121989631
Main Authors:	Sangkakam, Artit, Hemachudha, Pasin, Saraya, Abhinbhen W, Thaweethee-Sukjai, Benjamard, Cheun-Arom, Thaniwan, Latinne, Alice, Olival, Kevin J, Wacharapluesadee, Supaporn
Format:	Journal Article
Language:	English
Published:	London, England SAGE Publications 01-01-2021 Sage Publications Ltd SAGE Publishing
Subjects:	Influenza Length of stay Original influenza fever rectal Diagnosis nasopharyngeal
Online Access:	Get full text
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Summary:	Introduction: Influenza virus favours the respiratory tract as its primary site of host entry and replication, and it is transmitted mainly via respiratory secretions. Nasopharyngeal swab is the gold standard specimen type for influenza detection, but several studies have also suggested that the virus replicates in the human gastrointestinal tract. Methods: A retrospective study was conducted on all patients positive for influenza virus and initially recruited as part of the PREDICT project from 2017 to 2018. The objectives of the study were to investigate whether rectal swab could aid in improving influenza detection, and if there was any correlation between gastrointestinal disturbances and severity of infection, using length of hospital stay as an indicator of severity. Results: Of the 51 influenza-positive patients, 12 had detectable influenza virus in their rectal swab. Among these 12 rectal swab positive patients, influenza virus was not detected in the nasopharyngeal swab of three of them. Gastrointestinal symptoms were observed for 28.2% patients with a negative rectal swab negative and 25.0% patients with a positive rectal swab. Average length of hospital stay was 4.2 days for rectal swab positive group and 3.7 days for rectal swab negative group. This difference was not statistically significant (p = 0.288). Conclusions: There is no correlation between influenza virus detection in rectal swab and gastrointestinal disturbances or disease severity, and there is currently insufficient evidence to support replicative ability in the gastrointestinal tract.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2050-3121 2050-3121
DOI:	10.1177/2050312121989631