Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors

<p/> <p>The objective of the study was to identify risk factors for reintroduction of <it>Actinobacillus pleuopneumoniae </it>and <it>Mycoplasma hyopneumoniae </it>(enzootic pneumonia) onto pig farms in areas in Switzerland that were involved in an eradication pro...

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Main Authors: Scheidegger R, Stärk KDC, Zimmermann W, Hege R
Format: Article
Language:English
Published: BMC 2002-09-01
Series:Acta Veterinaria Scandinavica
Subjects:
Online Access:http://www.actavetscand.com/content/43/3/145
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spelling doaj-64fc88f043374c35820e7d9330c14e4d2020-11-25T01:58:20ZengBMCActa Veterinaria Scandinavica1751-01472002-09-0143314515610.1186/1751-0147-43-145Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk FactorsScheidegger RStärk KDCZimmermann WHege R<p/> <p>The objective of the study was to identify risk factors for reintroduction of <it>Actinobacillus pleuopneumoniae </it>and <it>Mycoplasma hyopneumoniae </it>(enzootic pneumonia) onto pig farms in areas in Switzerland that were involved in an eradication programme from 1996 to 1999 and to assess the role of dealers in relation to these reinfections. The study was based on the comparison of pig farms that were reinfected in the year 2000 (cases) and pig farms that remained uninfected in the same area (controls). Additionally, data were collected from Swiss pig dealers and transport companies.</p> <p>Out of a total of 3983 farms, 107 farms were reinfected in the year 2000. The incidences were 0.1% for <it>Actinobacillus pleuopneumoniae </it>and 2.6% for <it>Mycoplasma hyopneumoniae </it>(enzootic pneumonia). Compared to reinfection rates prior to the eradication programme, this is a considerable reduction. Statistically significant risk factors for the reinfection were 'finishing farm', 'large mixed breeding-finishing farm', 'reinfected neighbour' and 'parking site for pig transport vehicles close to the farm'. Pig farmers that purchased pigs from only one supplier per batch had a lower risk of reintroducing infection (protective factor). As long as infected and uninfected regions co-exist in Switzerland, direct and indirect contact between farms, pig herds and slaughter sites via transport vehicles are a major pathway of disease spread. Risk management measures linked to these contacts are therefore of key importance. The survey of dealers indicated various areas for improvement such as strategic planning of pick-up routes or cleaning and disinfecting of trucks.</p> http://www.actavetscand.com/content/43/3/145respiratory diseasesreinfectionswineareaeradicationprogramme.
collection DOAJ
language English
format Article
sources DOAJ
author Scheidegger R
Stärk KDC
Zimmermann W
Hege R
spellingShingle Scheidegger R
Stärk KDC
Zimmermann W
Hege R
Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
Acta Veterinaria Scandinavica
respiratory diseases
reinfection
swine
area
eradication
programme.
author_facet Scheidegger R
Stärk KDC
Zimmermann W
Hege R
author_sort Scheidegger R
title Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
title_short Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
title_full Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
title_fullStr Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
title_full_unstemmed Incidence of Reinfections with <it>Mycoplasma hyopneumoniae </it>and <it>Actinobacillus pleuropneumoniae </it>in Pig Farms Located in Respiratory-Disease-Free Regions of Switzerland – Identification and Quantification of Risk Factors
title_sort incidence of reinfections with <it>mycoplasma hyopneumoniae </it>and <it>actinobacillus pleuropneumoniae </it>in pig farms located in respiratory-disease-free regions of switzerland – identification and quantification of risk factors
publisher BMC
series Acta Veterinaria Scandinavica
issn 1751-0147
publishDate 2002-09-01
description <p/> <p>The objective of the study was to identify risk factors for reintroduction of <it>Actinobacillus pleuopneumoniae </it>and <it>Mycoplasma hyopneumoniae </it>(enzootic pneumonia) onto pig farms in areas in Switzerland that were involved in an eradication programme from 1996 to 1999 and to assess the role of dealers in relation to these reinfections. The study was based on the comparison of pig farms that were reinfected in the year 2000 (cases) and pig farms that remained uninfected in the same area (controls). Additionally, data were collected from Swiss pig dealers and transport companies.</p> <p>Out of a total of 3983 farms, 107 farms were reinfected in the year 2000. The incidences were 0.1% for <it>Actinobacillus pleuopneumoniae </it>and 2.6% for <it>Mycoplasma hyopneumoniae </it>(enzootic pneumonia). Compared to reinfection rates prior to the eradication programme, this is a considerable reduction. Statistically significant risk factors for the reinfection were 'finishing farm', 'large mixed breeding-finishing farm', 'reinfected neighbour' and 'parking site for pig transport vehicles close to the farm'. Pig farmers that purchased pigs from only one supplier per batch had a lower risk of reintroducing infection (protective factor). As long as infected and uninfected regions co-exist in Switzerland, direct and indirect contact between farms, pig herds and slaughter sites via transport vehicles are a major pathway of disease spread. Risk management measures linked to these contacts are therefore of key importance. The survey of dealers indicated various areas for improvement such as strategic planning of pick-up routes or cleaning and disinfecting of trucks.</p>
topic respiratory diseases
reinfection
swine
area
eradication
programme.
url http://www.actavetscand.com/content/43/3/145
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