Culture-positive shigellosis cases are epidemiologically different to culture-negative/PCR-positive cases.

Abstract:

OBJECTIVE:To review the epidemiological differences between culture-positive and culture-negative (but ipaH PCR-positive) cases of shigellosis in Sydney Local Health District (SLHD), NSW, to inform whether changes to the national case definition for shigellosis are required. METHODS:An audit of all cases of shigellosis (culture-positive vs. culture-negative/PCR-positive) in SLHD from 1 January 2013 to 30 June 2015 was conducted and demographic, clinical and risk factors were analysed and compared between these groups. RESULTS:Of the 148 shigellosis cases notified to SLHD, 122 cases (85 culture-positive vs. 37 culture-negative) were included for analysis. Culture-positive cases were more likely than culture-negative/PCR-positive cases to have experienced at least three symptoms (OR 3.18, 95%CI 1.3-7.5), been hospitalised (OR 4.2, 95%CI 1.4-13.2), and have had men-who-have-sex-with-men exposure identified as the source of their infection (OR 28.7, 95%CI 6.2-132.6). CONCLUSIONS:This study has identified that culture-positive vs. culture-negative/PCR-positive shigellosis cases in NSW differ by clinical severity and risk factors for infection. Implications for public health: The study findings warrant further research to determine the true diagnostic prevalence of Shigella in the culture-negative/PCR-positive group in the Australian context, in order to inform further changes to the national case definition for shigellosis.

authors

Quinn E,Najjar Z,Huhtinen E,Jegasothy E,Gupta L

doi

10.1111/1753-6405.12844

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

41-45

issue

1

eissn

1326-0200

issn

1753-6405

journal_volume

43

pub_type

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