Tracing isolates from domestic human Campylobacter jejuni infections to chicken slaughter batches and swimming water using whole-genome multilocus sequence typing

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Kovanen , S , Kivisto , R , Llarena , A-K , Zhang , J , Karkkainen , U-M , Tuuminen , T , Uksila , J , Hakkinen , M , Rossi , M & Hanninen , M-L 2016 , ' Tracing isolates from domestic human Campylobacter jejuni infections to chicken slaughter batches and swimming water using whole-genome multilocus sequence typing ' , International Journal of Food Microbiology , vol. 226 , pp. 53-60 . https://doi.org/10.1016/j.ijfoodmicro.2016.03.009

Title: Tracing isolates from domestic human Campylobacter jejuni infections to chicken slaughter batches and swimming water using whole-genome multilocus sequence typing
Author: Kovanen, Sara; Kivisto, Rauni; Llarena, Ann-Katrin; Zhang, Ji; Karkkainen, Ulla-Maija; Tuuminen, Tamara; Uksila, Jaakko; Hakkinen, Marjaana; Rossi, Mirko; Hanninen, Marja-Liisa
Contributor organization: Food Hygiene and Environmental Health
Department of Bacteriology and Immunology
Medicum
Mirko Rossi Research Group
Date: 2016-06-02
Language: eng
Number of pages: 8
Belongs to series: International Journal of Food Microbiology
ISSN: 0168-1605
DOI: https://doi.org/10.1016/j.ijfoodmicro.2016.03.009
URI: http://hdl.handle.net/10138/223995
Abstract: Campylobacter jejuni is the leading cause of bacterial gastroenteritis and chicken is considered a major reservoir and source of human campylobacteriosis. In this study, we investigated temporally related Finnish human (n = 95), chicken (n = 83) and swimming water (n = 20) C. jejuni isolates collected during the seasonal peak in 2012 using multilocus sequence typing (MIST) and whole-genome MIST (wgMLST). Our objective was to trace domestic human C jejuni infections to C jejuni isolates from chicken slaughter batches and swimming water. At MIST level, 79% of the sequence types (STs) of the human isolates overlapped with chicken STs suggesting chicken as an important reservoir. Four STs, the ST-45, ST-230, ST-267 and ST-677, covered 75% of the human and 64% of the chicken isolates. In addition, 50% of the swimming water isolates comprised ST-45, ST-230 and ST-677. Further wgMLST analysis of the isolates within STs, accounting their temporal relationship, revealed that 22 of the human isolates (24%) were traceable back to C jejuni positive chicken slaughter batches. None of the human isolates were traced back to swimming water, which was rather sporadically sampled. The highly discriminatory wgMLST, together with the patient background information and temporal relationship data with possible sources, offers a new, accurate approach to trace back the origin of domestic campylobacteriosis. Our results suggest that potentially a substantial proportion of campylobacteriosis cases during the seasonal peak most probably are due to other sources than chicken meat consumption. These findings warrant further wgMLST-based studies to reassess the role of other reservoirs in the Campylobacter epidemiology both in Finland and elsewhere. (C) 2016 Elsevier B.V. All rights reserved.
Subject: Domestically acquired campylobacteriosis
Summer peak
Chicken
Surface water
Source
SEASONAL PEAK
FINLAND
DISEASE
GENOTYPES
POULTRY
HOST
MLST
1183 Plant biology, microbiology, virology
3142 Public health care science, environmental and occupational health
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: publishedVersion


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