Evaluation of the effect of mannan-oligosaccharides on the competitive exclusion of Salmonella Enteritidis colonization in broiler chicks

Fernandez, F; Hinton, M.; Gils, B. Van

doi:10.1080/03079450020016823

Cited by 38 publications

(16 citation statements)

References 23 publications

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“…It is possible that the success of this phage type in poultry and humans is connected to very high intestinal invasiveness, as seen with the S. Enteritidis PT4 in this study. It has been shown that impairment of caecal colonization and invasion of S. Enteritidis PT4 by competitive exclusion inhibits the spread to internal organs (Nuotio et al, 1992;Fernandez et al, 2000), which supports the theory that invasion is an important factor for the establishment of S. Enteritidis PT4 in poultry. However, it is possible that differences in intestinal invasiveness of Salmonella serotypes only lead to differences in the time needed to establish the generalized infection and not to differences in severity of infection.…”

Section: Discussionsupporting

confidence: 63%

Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry

Aabo¹,

Christensen²,

Chadfield³

et al. 2002

Avian Pathology

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The aim of the present study was to compare the invasion of selected zoonotic Salmonella serotypes of poultry in an in vivo chicken intestinal loop model and also in vitro in epithelial cell cultures. Invasion was measured relative to a reference strain, Salmonella Typhimurium 4/74 invH201< TnphoA. Two serotypes demonstrated intracellular log 10 counts that differed significantly from all other serotypes tested: Salmonella Enteritidis PT4 being 1.5 log 10 colony forming units (CFU) (31-fold) higher, and Salmonella Tennessee being 0.7 log 10 CFU (fivefold) lower than the reference strain (P £ 0.0001). A group of serotypes, which can be vertically transmitted, showed significantly higher intracellular counts (fourfold to eightfold) than the reference strain. The group included S. Typhimurium 4/74, S. Typhimurium DT104 (poultry and porcine isolates), S. Enteritidis PT1, S. Enteritidis PT6, S. Enteritidis PT8, and Salmonella Berta. The serotypes Salmonella Hadar, Salmonella Virchow, S. 4,12:b:-, S. Typhimurium DT41, and Salmonella Infantis, most of which are considered horizontally transmitted, did not show significantly different intracellular counts from the reference strain. Results from the cell culture invasion studies agreed with the in vivo data, with the exception of S. Berta and the poultry isolate of S. Typhimurium DT104.

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Section: Discussionsupporting

confidence: 63%

Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry

Aabo¹,

Christensen²,

Chadfield³

et al. 2002

Avian Pathology

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“…After this initial information, detailed bacteriology results, including serotype and antibiotic sensitivity results of the Salmonella isolates, were also given to the companies. According to these results, companies could pursue the serotype-specific (Cooper et al ., 1994;Woodward et al ., 2002) and non-specific (Nurmi & Rantala, 1973;Fernandez et al ., 2000) control measures without any delay. Besides the rapid response, both SGBRT-PCR and PSRT-PCR including bacteriology were proved to be more economical per sample ($10).…”

Section: Discussionmentioning

confidence: 99%

Salmonellaprofile in chickens determined by real-time polymerase chain reaction and bacteriology from years 2000 to 2003 in Turkey

et al. 2005

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From years 2000 to 2003, Salmonella was investigated from a total of 1785 samples comprised of chicken intestinal samples, cloacal swabs, drag swabs, litter samples and chick dust samples collected from 191 poultry breeding flocks belonging to 15 different chicken breeding stock companies in the Marmara region, Turkey by a SYBR green-based real-time polymerase chain reaction (SGBRT-PCR), by a probe-specific real-time polymerase chain reaction (PSRT-PCR) and by standardized bacteriology as described in the manual of National Poultry Improvement Plan and Auxillary Provisions, United States Department of Agriculture. Between January 2000 and July 2001, Salmonella was detected at the rates of 5.87% and 4.10% out of a total of 1242 samples by SGBRT-PCR and bacteriology, respectively. From July 2001 until December 2003, Salmonella was found at rates of 11.42% and 5.52% from a total of 543 samples by PSRT-PCR and bacteriology, respectively. The dominant Salmonella serovar was determined as Salmonella enterica subsp. enterica Serovar Enteritidis (S. Enteritidis), while serogroup C1 and C2 in 2001 and serogroup E1 in 2002 were isolated as additional serovars. As a conclusion, S. Enteritidis seems to be the major problem in poultry breeding flocks in Turkey, and both of the real-time polymerase chain reaction methods were found more sensitive than standard bacteriology for the detection of Salmonella from poultry samples.

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“…Mixing 4000 ppm in the feed reduced caecal S. typhimurium concentrations after experimental infection of broiler chicks (Spring et al, 2000). Caecal contents from hens fed MOS protected chicks from colonization with S. enteritidis (Fernandez et al, 2000). The mechanism of action may be through blockage of type 1 fimbriae mediated Salmonella adhesion to the mucosa and more importantly through modulation of the local (mucosal) immune system and preservation of intestinal wall integrity.…”

Section: Prebioticsmentioning

confidence: 99%

Strategies to control Salmonella in the broiler production chain

Immerseel

Zutter

Houf

et al. 2009

World's Poultry Science Journal

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Broiler meat is one of the sources of Salmonella contamination of humans. Concerns about food safety have prompted the poultry industry and governments to introduce control plans to combat Salmonella. This has been strengthened by legislation, as is the case in the EU, where targets have been set forcing member states to decrease Salmonella prevalence in poultry flocks. Strategies to prevent transmission of Salmonella to humans should focus on the whole production chain of broiler meat and on the subsequent storage and handling of meat, thus from farm to fork. In the primary production phase, both hygienic measures and general farm management strategies are important. These management strategies should include in-feed Salmonella control and product administration. A wide range of feed additives is currently available for that purpose. Hygienic measures and logistic slaughter are tools to reduce the Salmonella contamination in the slaughterhouse. At retail and in the consumer's kitchen, care needs to be taken of product storage and handling to avoid contamination and bacterial growth. The numbers of contaminated Salmonella broiler flocks will most likely decrease in the future due to the established action plans, but complete eradication of Salmonella is unrealistic. The main issue is, however, to keep the flock prevalence, the within-flock prevalence and the numbers of bacteria in infected animals at such a low level, that contamination of meat, and thus transmission to humans, becomes a highly unlikely event. This clearly underlines the need for coordinated action of governments and poultry-related industries (including feed industry and slaughterhouses), at all stages of the production chain

show abstract

Evaluation of the effect of mannan-oligosaccharides on the competitive exclusion of Salmonella Enteritidis colonization in broiler chicks

Cited by 38 publications

References 23 publications

Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry

Quantitative comparison of intestinal invasion of zoonotic serotypes of Salmonella enterica in poultry

Salmonellaprofile in chickens determined by real-time polymerase chain reaction and bacteriology from years 2000 to 2003 in Turkey

Strategies to control Salmonella in the broiler production chain

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