Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry

J Ellis-Iversen, A Ridley, V Morris, A Sowa, J Harris, R Atterbury, NHC Sparks, V Allen

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Abstract

Campylobacter is the most common known source of human bacterial enteritis in the developed world and poultry is considered the main source. Broilers often become colonized with Campylobacter during rearing, and then contaminate the farm environment. The objective of this study was to identify Campylobacter-positive environmental reservoirs on farms, as these pose a risk to broiler flocks becoming colonized with Campylobacter. We considered the temporal aspects of exposure and colonization. A longitudinal study monitored six conventional rearing farms over 2 years. The broiler flocks, catchers’ equipment, vehicles, shed surrounds, shed entrance, other equipment, farm entrance, other animals, puddles, dead birds, mains water and drinkers were systematically sampled 2–4 times per flock. A multivariable generalized estimating equation model was used to assess associations between contaminated environmental sites and colonized broiler flocks. The associations were adjusted for confounders and other known risk factors. To further assess temporality of contamination, the sequence of contamination of the different environmental sites and the flocks was established. Contaminated shed entrances and anterooms, contaminated drinkers and shedding of Campylobacter by other animals such as cattle, dogs, wildlife and rodents were significantly associated with positive flocks. The reservoir of ‘other animals’ was also the reservoir most commonly positive before the flock became colonized. The other sites usually became contaminated after the flock was colonized.
Original languageEnglish
Pages (from-to)916 - 924
Number of pages9
JournalEpidemiology and Infection
Volume140
Publication statusFirst published - 2012

Fingerprint

Campylobacter
flocks
poultry
risk factors
farms
broiler chickens
sheds
bacterial enteritis
agricultural machinery and equipment
dead animals
longitudinal studies
wildlife
rodents
rearing
dogs
birds
cattle
animals

Bibliographical note

2057339

Keywords

  • Campylobacter
  • Control
  • Environment
  • Poultry
  • Reservoir

Cite this

Ellis-Iversen, J., Ridley, A., Morris, V., Sowa, A., Harris, J., Atterbury, R., ... Allen, V. (2012). Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry. Epidemiology and Infection, 140, 916 - 924.
Ellis-Iversen, J ; Ridley, A ; Morris, V ; Sowa, A ; Harris, J ; Atterbury, R ; Sparks, NHC ; Allen, V. / Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry. In: Epidemiology and Infection. 2012 ; Vol. 140. pp. 916 - 924.
@article{8d3e82795e2048a5a8cd1a8e9999e84e,
title = "Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry",
abstract = "Campylobacter is the most common known source of human bacterial enteritis in the developed world and poultry is considered the main source. Broilers often become colonized with Campylobacter during rearing, and then contaminate the farm environment. The objective of this study was to identify Campylobacter-positive environmental reservoirs on farms, as these pose a risk to broiler flocks becoming colonized with Campylobacter. We considered the temporal aspects of exposure and colonization. A longitudinal study monitored six conventional rearing farms over 2 years. The broiler flocks, catchers’ equipment, vehicles, shed surrounds, shed entrance, other equipment, farm entrance, other animals, puddles, dead birds, mains water and drinkers were systematically sampled 2–4 times per flock. A multivariable generalized estimating equation model was used to assess associations between contaminated environmental sites and colonized broiler flocks. The associations were adjusted for confounders and other known risk factors. To further assess temporality of contamination, the sequence of contamination of the different environmental sites and the flocks was established. Contaminated shed entrances and anterooms, contaminated drinkers and shedding of Campylobacter by other animals such as cattle, dogs, wildlife and rodents were significantly associated with positive flocks. The reservoir of ‘other animals’ was also the reservoir most commonly positive before the flock became colonized. The other sites usually became contaminated after the flock was colonized.",
keywords = "Campylobacter, Control, Environment, Poultry, Reservoir",
author = "J Ellis-Iversen and A Ridley and V Morris and A Sowa and J Harris and R Atterbury and NHC Sparks and V Allen",
note = "2057339",
year = "2012",
language = "English",
volume = "140",
pages = "916 -- 924",
journal = "Epidemiology and Infection",
issn = "0950-2688",
publisher = "Cambridge University Press",

}

Ellis-Iversen, J, Ridley, A, Morris, V, Sowa, A, Harris, J, Atterbury, R, Sparks, NHC & Allen, V 2012, 'Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry', Epidemiology and Infection, vol. 140, pp. 916 - 924.

Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry. / Ellis-Iversen, J; Ridley, A; Morris, V; Sowa, A; Harris, J; Atterbury, R; Sparks, NHC; Allen, V.

In: Epidemiology and Infection, Vol. 140, 2012, p. 916 - 924.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry

AU - Ellis-Iversen, J

AU - Ridley, A

AU - Morris, V

AU - Sowa, A

AU - Harris, J

AU - Atterbury, R

AU - Sparks, NHC

AU - Allen, V

N1 - 2057339

PY - 2012

Y1 - 2012

N2 - Campylobacter is the most common known source of human bacterial enteritis in the developed world and poultry is considered the main source. Broilers often become colonized with Campylobacter during rearing, and then contaminate the farm environment. The objective of this study was to identify Campylobacter-positive environmental reservoirs on farms, as these pose a risk to broiler flocks becoming colonized with Campylobacter. We considered the temporal aspects of exposure and colonization. A longitudinal study monitored six conventional rearing farms over 2 years. The broiler flocks, catchers’ equipment, vehicles, shed surrounds, shed entrance, other equipment, farm entrance, other animals, puddles, dead birds, mains water and drinkers were systematically sampled 2–4 times per flock. A multivariable generalized estimating equation model was used to assess associations between contaminated environmental sites and colonized broiler flocks. The associations were adjusted for confounders and other known risk factors. To further assess temporality of contamination, the sequence of contamination of the different environmental sites and the flocks was established. Contaminated shed entrances and anterooms, contaminated drinkers and shedding of Campylobacter by other animals such as cattle, dogs, wildlife and rodents were significantly associated with positive flocks. The reservoir of ‘other animals’ was also the reservoir most commonly positive before the flock became colonized. The other sites usually became contaminated after the flock was colonized.

AB - Campylobacter is the most common known source of human bacterial enteritis in the developed world and poultry is considered the main source. Broilers often become colonized with Campylobacter during rearing, and then contaminate the farm environment. The objective of this study was to identify Campylobacter-positive environmental reservoirs on farms, as these pose a risk to broiler flocks becoming colonized with Campylobacter. We considered the temporal aspects of exposure and colonization. A longitudinal study monitored six conventional rearing farms over 2 years. The broiler flocks, catchers’ equipment, vehicles, shed surrounds, shed entrance, other equipment, farm entrance, other animals, puddles, dead birds, mains water and drinkers were systematically sampled 2–4 times per flock. A multivariable generalized estimating equation model was used to assess associations between contaminated environmental sites and colonized broiler flocks. The associations were adjusted for confounders and other known risk factors. To further assess temporality of contamination, the sequence of contamination of the different environmental sites and the flocks was established. Contaminated shed entrances and anterooms, contaminated drinkers and shedding of Campylobacter by other animals such as cattle, dogs, wildlife and rodents were significantly associated with positive flocks. The reservoir of ‘other animals’ was also the reservoir most commonly positive before the flock became colonized. The other sites usually became contaminated after the flock was colonized.

KW - Campylobacter

KW - Control

KW - Environment

KW - Poultry

KW - Reservoir

M3 - Article

VL - 140

SP - 916

EP - 924

JO - Epidemiology and Infection

JF - Epidemiology and Infection

SN - 0950-2688

ER -

Ellis-Iversen J, Ridley A, Morris V, Sowa A, Harris J, Atterbury R et al. Persistent environmental reservoirs on farms as risk factors for Campylobacter in commercial poultry. Epidemiology and Infection. 2012;140:916 - 924.