Prevalence of and risk factors for<i>Campylobacter</i>colonisation in broiler flocks at the end of the rearing period in France

Allain, V.; Chemaly, Marianne; Laisney, M-J.; Rouxel, Sandra; Quesne, Segolénè; Bouquin, Sophie Le

doi:10.1080/00071668.2014.941788

Cited by 46 publications

(34 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The method for collection of samples was the same as that described by Allain et al (2014). On farm, five broilers per flock were euthanized with pentobarbital; their caecal contents were collected and pooled in a sterile bag one week before slaughter.…”

Section: Sample Collection On Farm and At Slaughtermentioning

confidence: 99%

Associations between animal welfare indicators and Campylobacter spp. in broiler chickens under commercial settings: A case study

Alpigiani

Abrahantes

Michel³

et al. 2017

Preventive Veterinary Medicine

View full text Add to dashboard Cite

Few studies have previously investigated how poor animal welfare might be associated with infection of zoonotic pathogens in humans. This paper assesses the predictive value of the presence of Campylobacter spp. in broiler chicken flocks when animal-based measures related to footpad dermatitis, hock burns, body lesions and arthritis are identified under commercial conditions (high density). The study population included 32 flocks analysed on farm and at slaughter, slaughtered between April and August 2008 in six different slaughter plants in Brittany, France. Welfare and health indicators are those indicated by the European legislation and sampling was carried out in the framework of the European baseline survey on the prevalence of Campylobacter in broiler chicken. Caecal contents, sampled both on farm and at slaughter, and carcass skin samples from the neck and breast at slaughter, were investigated for the presence of Campylobacter spp. Logistic models/classification trees were used to estimate the probability of the presence (or absence) of a specific foodborne pathogen in a flock based on specific animal-based measures (or combinations of measures) in order to study the potential relationship between welfare indicators and foodborne pathogen prevalence/incidence levels. On farm, flocks with more than 25% animals with severe lesions on between 25 and 50% of the footpad are predicted to be Campylobacter-positive whereas flocks where less than 13 individuals have arthritis are predicted to be Campylobacter-negative. The error rate on farm and at slaughter was 10 and 4% respectively indicating good predicting abilities. A poor welfare environment may result in stress, which reduces chicken immunocompetence making them more susceptible to Campylobacter spp. An infection with Campylobacter spp may lead to impaired defence and susceptibility to other pathogens which may result in greater intestinal excretion. Poor welfare and high growing rate lead to digestive troubles that lead to litter humidity. Litter humidity that, among other things, causes footpad dermatitis may also influence the horizontal transmission of the Campylobacter spp. infection due to the normal coprophagic behaviour of poultry. Reducing welfare problems by a better management of rearing conditions would not only improve broiler welfare, but it would also decrease the risks of Campylobacter contamination, of carcass condemnations and of economic loss for the poultry industry.

show abstract

Section: Sample Collection On Farm and At Slaughtermentioning

confidence: 99%

Associations between animal welfare indicators and Campylobacter spp. in broiler chickens under commercial settings: A case study

Alpigiani

Abrahantes

Michel³

et al. 2017

Preventive Veterinary Medicine

View full text Add to dashboard Cite

show abstract

“…The frequency of Campylobacter ‐positive broiler flocks in the study (24 out of 63 tested flocks) appeared to be low in comparison with the prevalence of 76% measured in 2008 in France (Allain et al., ). The broiler flocks were sampled at an early age (between 15 and 21 days) for logistical reasons, and some negative flocks may have later become positive for Campylobacter after the initial testing.…”

Section: Discussionmentioning

confidence: 51%

Randomized control trial to test the effect of a feed additive on Campylobacter contamination in commercial broiler flocks up to slaughter

Huneau‐Salaün

Guyard‐Nicodème

Benzoni³

et al. 2018

Zoonoses and Public Health

Self Cite

View full text Add to dashboard Cite

A randomized controlled trial (RCT) was carried to evaluate the effect of a feed additive on Campylobacter contamination of broilers reared in commercial conditions. Twenty-four broiler flocks naturally contaminated with Campylobacter were enrolled in the RCT: 12 were assigned to a control group (C) fed with a conventional finishing feed from 4 weeks of age to slaughter (around 35 days), and the other group of 12 flocks (S) was fed with a finishing feed supplemented with 250 ppm of a patented feed additive (an ion-exchanged clay compound) previously proven to reduce Campylobacter contamination in broiler caeca under experimental conditions. Enumeration of Campylobacter colonies in caeca (8 per flock) was carried out following ISO standards before feed distribution and at slaughter. Before treatment, the caecal Campylobacter load tended to be lower in C flocks (7.1 ± 1.9 log CFU/g, CI [6.6-7.5]) than in S flocks (7.7 ± 1.0 log UFC/g, CI [7.5-7.9]) (p = .05). At slaughter, the bacterial load was similar in the S (7.7 ± 1.0 log CFU/g, CI [7.5-7.9]) and C groups (7.5 ± 1.2 log CFU/g, CI [7.2-7.8]) (p = .73). Therefore, the feed additive had no significant effect on the caecal Campylobacter load at slaughter under the tested conditions. The logistical constraints inherent in field trials and the natural variability of Campylobacter contamination in naturally infected broiler flocks make it difficult to reproduce experimental results in in situ farm conditions. RCT testing of an intervention strategy in commercial situation is therefore a key step in evaluating pre-harvest interventions against food-borne pathogens.

show abstract

“…Allain et al . () showed that rodent control around the broiler house led to a significant reduction in contamination: 92% of flocks were Campylobacter positive when no rodent control was implemented, whereas this percentage dropped to 66% on farms applying rodent control measures.…”

Section: Security and Hygiene Measuresmentioning

confidence: 99%

“…; Allain et al . ). Contaminated water from puddles and ditches could contribute to horizontal transmission.…”

Section: Introductionmentioning

confidence: 97%

Control strategies against Campylobacter at the poultry production level: biosecurity measures, feed additives and vaccination

et al. 2016

Self Cite

View full text Add to dashboard Cite

Summary Campylobacteriosis is the most prevalent bacterial foodborne gastroenteritis affecting humans in the European Union, and ranks second in the United States only behind salmonellosis. In Europe, there are about nine million cases of campylobacteriosis every year, making the disease a major public health issue. Human cases are mainly caused by the zoonotic pathogen Campylobacter jejuni. The main source of contamination is handling or consumption of poultry meat. Poultry constitutes the main reservoir of Campylobacter, substantial quantities of which are found in the intestines following rapid, intense colonization. Reducing Campylobacter levels in the poultry chain would decrease the incidence of human campylobacteriosis. As primary production is a crucial step in Campylobacter poultry contamination, controlling the infection at this level could impact the following links along the food chain (slaughter, retail and consumption). This review describes the control strategies implemented during the past few decades in primary poultry production, including the most recent studies. In fact, the implementation of biosecurity and hygiene measures is described, as well as the immune strategy with passive immunization and vaccination trials and the nutritional strategy with the administration of organic and fatty acids, essential oil and plant‐derived compound, probiotics, bacteriocins and bacteriophages.

show abstract

Prevalence of and risk factors forCampylobactercolonisation in broiler flocks at the end of the rearing period in France

Cited by 46 publications

References 23 publications

Associations between animal welfare indicators and Campylobacter spp. in broiler chickens under commercial settings: A case study

Associations between animal welfare indicators and Campylobacter spp. in broiler chickens under commercial settings: A case study

Randomized control trial to test the effect of a feed additive on Campylobacter contamination in commercial broiler flocks up to slaughter

Control strategies against Campylobacter at the poultry production level: biosecurity measures, feed additives and vaccination

Contact Info

Product

Resources

About