Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach

<p>Abstract</p> <p>Background</p> <p>Campylobacteriosis is the most frequently reported zoonosis in the EU and the epidemiology of sporadic campylobacteriosis, especially the routes of transmission, is to a great extent unclear. Poultry easily become colonised with <...

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Main Authors: Norström Madelaine, Heier Berit, Jonsson Malin E, Hofshagen Merete
Format: Article
Language:English
Published: BMC 2010-09-01
Series:International Journal of Health Geographics
Online Access:http://www.ij-healthgeographics.com/content/9/1/48
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author Norström Madelaine
Heier Berit
Jonsson Malin E
Hofshagen Merete
author_facet Norström Madelaine
Heier Berit
Jonsson Malin E
Hofshagen Merete
author_sort Norström Madelaine
collection DOAJ
description <p>Abstract</p> <p>Background</p> <p>Campylobacteriosis is the most frequently reported zoonosis in the EU and the epidemiology of sporadic campylobacteriosis, especially the routes of transmission, is to a great extent unclear. Poultry easily become colonised with <it>Campylobacter </it>spp., being symptom-less intestinal carriers. Earlier it was estimated that internationally between 50% and 80% of the cases could be attributed to chicken as a reservoir. In a Norwegian surveillance programme all broiler flocks under 50 days of age were tested for <it>Campylobacter </it>spp. The aim of the current study was to identify simultaneous local space-time clusters each year from 2002 to 2007 for human cases of campylobacteriosis and for broiler flocks testing positive for <it>Campylobacter </it>spp. using a multivariate spatial scan statistic method. A cluster occurring simultaneously in humans and broilers could indicate the presence of common factors associated with the dissemination of <it>Campylobacter </it>spp. for both humans and broilers.</p> <p>Results</p> <p>Local space-time clusters of humans and broilers positive for <it>Campylobacter </it>spp. occurring simultaneously were identified in all investigated years. All clusters but one were identified from May to August. Some municipalities were included in clusters all years.</p> <p>Conclusions</p> <p>The simultaneous occurrence of clusters of humans and broilers positive for <it>Campylobacter </it>spp. combined with the knowledge that poultry meat has a nation-wide distribution indicates that campylobacteriosis cases might also be caused by other risk factors than consumption and handling of poultry meat.</p> <p>Broiler farms that are positive could contaminate the environment with further spread to new broiler farms or to humans living in the area and local environmental factors, such as climate, might influence the spread of <it>Campylobacter </it>spp. in an area. Further studies to clarify the role of such factors are needed.</p>
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spelling doaj.art-48981a53d5b94939ab09593c032b94f52022-12-22T03:06:49ZengBMCInternational Journal of Health Geographics1476-072X2010-09-01914810.1186/1476-072X-9-48Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approachNorström MadelaineHeier BeritJonsson Malin EHofshagen Merete<p>Abstract</p> <p>Background</p> <p>Campylobacteriosis is the most frequently reported zoonosis in the EU and the epidemiology of sporadic campylobacteriosis, especially the routes of transmission, is to a great extent unclear. Poultry easily become colonised with <it>Campylobacter </it>spp., being symptom-less intestinal carriers. Earlier it was estimated that internationally between 50% and 80% of the cases could be attributed to chicken as a reservoir. In a Norwegian surveillance programme all broiler flocks under 50 days of age were tested for <it>Campylobacter </it>spp. The aim of the current study was to identify simultaneous local space-time clusters each year from 2002 to 2007 for human cases of campylobacteriosis and for broiler flocks testing positive for <it>Campylobacter </it>spp. using a multivariate spatial scan statistic method. A cluster occurring simultaneously in humans and broilers could indicate the presence of common factors associated with the dissemination of <it>Campylobacter </it>spp. for both humans and broilers.</p> <p>Results</p> <p>Local space-time clusters of humans and broilers positive for <it>Campylobacter </it>spp. occurring simultaneously were identified in all investigated years. All clusters but one were identified from May to August. Some municipalities were included in clusters all years.</p> <p>Conclusions</p> <p>The simultaneous occurrence of clusters of humans and broilers positive for <it>Campylobacter </it>spp. combined with the knowledge that poultry meat has a nation-wide distribution indicates that campylobacteriosis cases might also be caused by other risk factors than consumption and handling of poultry meat.</p> <p>Broiler farms that are positive could contaminate the environment with further spread to new broiler farms or to humans living in the area and local environmental factors, such as climate, might influence the spread of <it>Campylobacter </it>spp. in an area. Further studies to clarify the role of such factors are needed.</p>http://www.ij-healthgeographics.com/content/9/1/48
spellingShingle Norström Madelaine
Heier Berit
Jonsson Malin E
Hofshagen Merete
Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
International Journal of Health Geographics
title Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
title_full Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
title_fullStr Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
title_full_unstemmed Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
title_short Analysis of simultaneous space-time clusters of <it>Campylobacter </it>spp. in humans and in broiler flocks using a multiple dataset approach
title_sort analysis of simultaneous space time clusters of it campylobacter it spp in humans and in broiler flocks using a multiple dataset approach
url http://www.ij-healthgeographics.com/content/9/1/48
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AT heierberit analysisofsimultaneousspacetimeclustersofitcampylobacteritsppinhumansandinbroilerflocksusingamultipledatasetapproach
AT jonssonmaline analysisofsimultaneousspacetimeclustersofitcampylobacteritsppinhumansandinbroilerflocksusingamultipledatasetapproach
AT hofshagenmerete analysisofsimultaneousspacetimeclustersofitcampylobacteritsppinhumansandinbroilerflocksusingamultipledatasetapproach