Bayesian estimation of flock-level sensitivity of detection of Salmonella spp., Enteritidis and Typhimurium according to the sampling procedure in French laying-hen houses

Mahé, A.; Bougeard, Stéphanie; Huneau‐Salaün, A.; Bouquin, Sophie Le; Petetin, I.; Rouxel, Sandra; Lalande, Françoise; Belœil, Pierre‐Alexandre; Rose, Nicolas

doi:10.1016/j.prevetmed.2007.10.003

Cited by 24 publications

(29 citation statements)

References 14 publications

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“…Houses with a scraper system and step-cages represent two thirds of all cage systems in the United Kingdom, similar to other EU countries (R. Davies, unpublished data). Therefore it is not surprising that a higher prevalence of SE in cage houses has also been reported in studies throughout the EU [27][28][29]. However, in one study the opposite was found where hens within flocks were of different ages [30], which would be expected in multi-age flocks.…”

Section: Discussionmentioning

confidence: 81%

Persistence and clearance of differentSalmonellaserovars in buildings housing laying hens

Carrique-Mas¹,

Breslin²,

Snow³

et al. 2008

Epidemiol. Infect.

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We investigated factors associated with persistence of different Salmonella serovars in buildings housing laying hens in Great Britain using survival analysis. A total of 264 incidents of Salmonella detection occurring between July 1998 and August 2007 in 152 houses were recorded. For incidents involving Salmonella Enteritidis (SE), both the rodent score of the house and the type of house were positively associated with persistence. For non-SE serovars, only the type of house was associated with persistence. Persistence of SE in the houses was longest (>15 months) in step-cage and cage-scraper houses when high levels of rodents were present, and lowest in non-cage and cage-belt houses. We estimated that 42% (95% CI 23.3-63.1) of SE incidents may be cleared during the lay period, and this was related to elimination of rodents from the houses. From January 2009, EU legislation will ban the sale of fresh eggs from SE-positive and S. Typhimurium-positive flocks over their remaining lifespan. If infection is eliminated from such flocks, they would cease to represent a public health risk.

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Section: Discussionmentioning

confidence: 81%

Persistence and clearance of differentSalmonellaserovars in buildings housing laying hens

Carrique-Mas¹,

Breslin²,

Snow³

et al. 2008

Epidemiol. Infect.

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show abstract

“…Animals and their products, particularly chicken, meat and eggs, are considered to be major sources of human infections caused by this pathogen [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Salmonella Enteritidis isolated from foods and patients in northern Morocco

Ammari

Laglaoui²,

En-nanei

et al. 2009

J Infect Dev Ctries

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Objectives: This study aimed to investigate Salmonella Enteritidis strains isolated from human and food sources in the north of Morocco by means of phenotypic and genotypic methods. Methodology: Fifteen isolates from humans and food were submitted to phage typing, XbaI-macrorestriction (pulsed field gel electrophoresis [PFGE]), enterobacterial repetitive intergenic consensus (ERIC-PCR), antimicrobial susceptibility testing, and PCR assay targeting the spvR and invA genes. Results: Six fingerprinting profiles were obtained with the ERIC-PCR method, four with PFGE profiling, five with antimicrobial resistance, three with phage typing, and only one with plasmid profiling. spvR gene was detected in six strains, which did not harbour plasmids of 90 kb. Conclusions: The conclusions of this study are drawn from a limited number of isolates. It would be desirable to investigate a greater and more diverse population of Salmonella isolates. S. Enteritidis was genotyped and showed four different patterns by PFGE and six by ERIC-PCR. Accordingly, high genetic similarity and limited genetic diversity were found for these strains from north of Morocco.

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“…The stage of infection may also condition the results since dust is likely to test negative in the very early stages of infection (Davies and Breslin 2001;Davies and Breslin 2004;EC 2004;EFSA 2007). Also the efficiency of dust sampling appears to depend on the type of house sampled, and it is suggested that it is more efficient in cage houses (Mahe et al 2008;Huneau-Salaun et al 2009). A plausible explanation for this is that in non-cage houses sufficient amounts of settled dust may not always be available for sampling, and this may compromise the efficiency of dust testing (Davies 2005).…”

Section: What To Samplementioning

confidence: 99%

“…A study in France analysing EU layer survey data suggested a lower prevalence of positive environmental samples from flocks kept in non-cage houses (Mahe et al 2008). In the UK there is some evidence of a higher within-flock prevalence in non-cage flocks (Arnold et al 2009a).…”

Section: Factors Affecting the Detection Of Salmonella Infectionmentioning

confidence: 99%

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Detection and monitoring of Salmonella in laying hen flocks

Davies¹,

Carrique-Mas²

2011

Improving the Safety and Quality of Eggs and Egg Products

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Bayesian estimation of flock-level sensitivity of detection of Salmonella spp., Enteritidis and Typhimurium according to the sampling procedure in French laying-hen houses

Cited by 24 publications

References 14 publications

Persistence and clearance of differentSalmonellaserovars in buildings housing laying hens

Persistence and clearance of differentSalmonellaserovars in buildings housing laying hens

Characterization of Salmonella Enteritidis isolated from foods and patients in northern Morocco

Detection and monitoring of Salmonella in laying hen flocks

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