Specific adhesion and invasion of Salmonella Enteritidis in the vagina of laying hens

Mizumoto, Naoe; Sasai, Kazumi; Tani, Hiroyuki; Baba, Eiichiroh

doi:10.1016/j.vetmic.2005.09.006

Cited by 27 publications

(31 citation statements)

References 27 publications

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“…Furthermore, it has been established that the mean number of Salmonella in the vaginal epithelium depended on their lipopolysaccharide (LPS) type, with the rank order as follows: LPS type O9 (S. Enteritidis) > LPS type O4 (S. Agona, S. Typhimurium and S. Heidelberg) > LPS type O7 (S. Montevideo and S. Infantis) and LPS type O8 (S. Hadar). This rank order of Salmonella invasiveness is in accordance with the frequency of Salmonella outbreaks involving contaminated eggs (Mizumoto et al, 2005).…”

Section: B Salmonella Contamination Of the Egg Contentssupporting

confidence: 56%

“…Comparison of in vitro adherence of these six serovars using vaginal explants has also confirmed that S. Enteritidis has a specific advantage over the other Salmonella serovars in its capacity to colonise the vaginal tissues of hens, and this higher affinity to the vagina is likely to play a major role in the production of S. Enteritidis contaminated eggs (Okamura et al, 2001). These advantages of S. Enteritidis in long term colonisation of the reproductive organs of hens have been confirmed using different approaches and somewhat different strains (Okamura et al, 2001, Mizumoto, et al, 2005. Furthermore, it has been established that the mean number of Salmonella in the vaginal epithelium depended on their lipopolysaccharide (LPS) type, with the rank order as follows: LPS type O9 (S. Enteritidis) > LPS type O4 (S. Agona, S. Typhimurium and S. Heidelberg) > LPS type O7 (S. Montevideo and S. Infantis) and LPS type O8 (S. Hadar).…”

Section: B Salmonella Contamination Of the Egg Contentsmentioning

confidence: 88%

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Scientific Opinion on a quantitative estimation of the public health impact of setting a new target for the reduction of Salmonella in laying hens

Andréoletti¹,

Budka²,

Bunčić³

et al. 2010

EFS2

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European Food Safety Authority (EFSA), Parma, Italy ABSTRACTPublic health risks of Salmonella infection in laying hens (Gallus gallus) can be associated with exposure through four different pathways: internally contaminated table eggs, externally contaminated table eggs, egg products and meat from spent hens. In relation to eggs, Salmonella Enteritidis is by far the serovar most frequently associated with human illness, and exposure through eggs that are internally contaminated with this serovar has a higher public health significance than exposure to externally contaminated eggs. A mathematical model, using reported field data from two EU Member States (MSs), suggests a linear relationship between the investigated scenarios of flock prevalence for Salmonella Enteritidis and the number of contaminated eggs that would be laid. However, the absolute public health impact of the assessed flock prevalence scenarios is highly uncertain due to lack of data on the number of contaminated eggs produced by infected flocks and on the true number of egg-related human salmonellosis cases. It is suggested that public health benefits, similar to those obtained reaching lower Salmonella flock prevalences, may be achieved by implementing controls based on more sensitive sampling protocols. Diversion of eggs from flocks that are tested positive in the EU Salmonella control programme to the production of egg products subjected to heat treatment may lead to increased health risks as heat treatment of egg products should not be considered an absolute barrier to Salmonella contamination. Fresh meat from spent laying hens might carry a higher prevalence of Salmonella than meat from broiler flocks, in particular if sourced from Salmonella-positive flocks. The quantification of under-ascertainment and underreporting of human salmonellosis cases, improving knowledge on within-flock dynamics of Salmonella and harvesting data on production of Salmonella contaminated eggs under field conditions would contribute to improving the accuracy of future quantitative estimates. KEY WORDSSalmonella, microbiological target, laying hen, eggs, quantitative microbiological risk assessment. SUMMARYFollowing a request from the European Commission, the Panel on Biological Hazards (BIOHAZ) was asked to deliver a Scientific Opinion on a quantitative estimate of the public health impact of setting a new target for the reduction of Salmonella in laying hens. In particular, EFSA was asked to assess the relative public health impact if a new target for reduction of Salmonella is set for laying hen flocks being 1% or less remaining positive for all Salmonella serovars with public health significance, compared to (1) a theoretical prevalence of 2% of flocks remaining positive for Salmonella Enteritidis or Salmonella Typhimurium, and (2) the real prevalence in 2008 to be reported by the Member States (MSs).For this task, the BIOHAZ Panel took into account data from the first year of the harmonised EUwide monitoring and control programme of Salmonella in laying hens...

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Section: B Salmonella Contamination Of the Egg Contentssupporting

confidence: 56%

Section: B Salmonella Contamination Of the Egg Contentsmentioning

confidence: 88%

Scientific Opinion on a quantitative estimation of the public health impact of setting a new target for the reduction of Salmonella in laying hens

Andréoletti¹,

Budka²,

Bunčić³

et al. 2010

EFS2

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“…Concerning Salmonella infection in poultry, little is known about how and to what extent Salmonella strains enter the gut mucosa. Only a few studies are focused on the mucosal invasiveness of different Salmonella strains, but experiments either were conducted with ex vivo cell culture systems (33,42) or permanent cell lines (1,26) or were gut loop experiments (1). In fact, the mucosal epithelium is not only a physical barrier but also the initiator of the innate immune response to Salmonella.…”

mentioning

confidence: 99%

Chicken Cecum Immune Response toSalmonella entericaSerovars of Different Levels of Invasiveness

et al. 2007

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“…Salmonella serotypes associated with poultry reproductive tissues that are of public health concern include Salmonella Enteritidis, Salmonella Typhimurium and Salmonella Heidelberg. Among the different serotypes, Salmonella Enteritidis may be better able to achieve invasion, and as a consequence, may be found more frequently in reproductive tissues 17,18 .…”

Section: Transovarian or Vertical Transmissionmentioning

confidence: 99%

Role of egg in food born salmonellosis: A public health issue.

Fardows

Shamsuzzaman

2017

Bangladesh J Med Microbiol

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Specific adhesion and invasion of Salmonella Enteritidis in the vagina of laying hens

Cited by 27 publications

References 27 publications

Scientific Opinion on a quantitative estimation of the public health impact of setting a new target for the reduction of Salmonella in laying hens

Scientific Opinion on a quantitative estimation of the public health impact of setting a new target for the reduction of Salmonella in laying hens

Chicken Cecum Immune Response toSalmonella entericaSerovars of Different Levels of Invasiveness

Role of egg in food born salmonellosis: A public health issue.

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