Environmental Dissemination of Foodborne<i>Salmonella</i>in Preharvest Poultry Production: Reservoirs, Critical Factors, and Research Strategies

Park, S. Y.; Woodward, C.L.; Kubena, L. F.; Nisbet, D. J.; Birkhold, S. G.; Ricke, Steven C.

doi:10.1080/10643380701598227

Cited by 45 publications

(31 citation statements)

References 239 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These stressors can originate as a wide range of physical and chemical challenges either in the environmental niches that Salmonella occupies or as manufactured barriers, such as those incorporated during food production and processing, such as antimicrobials, disinfectants, biocides, and preservatives. These intervention approaches have been reviewed extensively elsewhere (273,(287)(288)(289)(290)(291).…”

Section: Salmonella and Stress Responses In The Chicken Gitmentioning

confidence: 99%

Salmonella Pathogenicity and Host Adaptation in Chicken-Associated Serovars

Foley

Johnson

Ricke

et al. 2013

Microbiol Mol Biol Rev

262

218

View full text Add to dashboard Cite

SUMMARY Enteric pathogens such as Salmonella enterica cause significant morbidity and mortality. S. enterica serovars are a diverse group of pathogens that have evolved to survive in a wide range of environments and across multiple hosts. S. enterica serovars such as S . Typhi, S . Dublin, and S . Gallinarum have a restricted host range, in which they are typically associated with one or a few host species, while S . Enteritidis and S . Typhimurium have broad host ranges. This review examines how S. enterica has evolved through adaptation to different host environments, especially as related to the chicken host, and continues to be an important human pathogen. Several factors impact host range, and these include the acquisition of genes via horizontal gene transfer with plasmids, transposons, and phages, which can potentially expand host range, and the loss of genes or their function, which would reduce the range of hosts that the organism can infect. S . Gallinarum, with a limited host range, has a large number of pseudogenes in its genome compared to broader-host-range serovars. S. enterica serovars such as S . Kentucky and S . Heidelberg also often have plasmids that may help them colonize poultry more efficiently. The ability to colonize different hosts also involves interactions with the host's immune system and commensal organisms that are present. Thus, the factors that impact the ability of Salmonella to colonize a particular host species, such as chickens, are complex and multifactorial, involving the host, the pathogen, and extrinsic pressures. It is the interplay of these factors which leads to the differences in host ranges that we observe today.

show abstract

Section: Salmonella and Stress Responses In The Chicken Gitmentioning

confidence: 99%

Salmonella Pathogenicity and Host Adaptation in Chicken-Associated Serovars

Foley

Johnson

Ricke

et al. 2013

Microbiol Mol Biol Rev

262

218

View full text Add to dashboard Cite

show abstract

“…Unfortunately, many bacteria can be pathogenic, such as some coliform bacteria that are common human and animal enteric micro-organisms [3]. An agricultural livestock slaughterhouse is therefore a large and potential source of pathogenic bacteria [4].…”

Section: Introductionmentioning

confidence: 99%

Bacterial Pathogen Occurrence and Persistence in Livestock Mortality Biopiles

2017

View full text Add to dashboard Cite

Abstract:Properly managed biopiles can be used for slaughterhouse-residual degradation and bacterial pathogen inactivation, which otherwise represent a major health risk in the environment. Biopiles were used to dispose of slaughterhouse-residuals and determine the occurrence and persistence patterns of indicators of pathogenic bacteria. The indicator bacteria included the family Enterobacteriaceae, total coliforms, Escherichia coli, nalidixic acid-resistant E. coli, and Streptococcus fecalis. The slaughterhouse-residual biopiles remained static for 164 d in 2006 and 141 d in 2007. In biopile effluent samples, exponentially decreasing populations of the indicator bacteria were observed. Indicator bacteria presence in biopile and soil samples suggested their retention and persistence in, but not migration from, the media. Though the family Enterobacteriaceae, total coliforms, and Escherichia coli shared behavioral correlations, they exhibited different fates in all media compared to S. fecalis, which was observed to persist and re-grow. The behavior of inoculated nalidixic acid-resistant E. coli suggested that inactivation was the primary process in the biopiles. However, the biopiles constituted continual sources of the indicator bacteria due to their persistence in isolated and protected locations, and changes in dominant species. While biopiling slaughterhouse-residuals was effective to inactivate >99% (log reductions) of indicator bacteria, tertiary methods and biopiling phases should be employed to ensure inactivation of pathogenic bacteria in animal waste biopiles. The fate of bacterial indicators in this system exhibited trends not-as-yet observed for animal waste biopiling activities, which generates numerous questions for further research.

show abstract

“…Much of the risk of exposure is subject to a number of factors including contaminated feeds, vectors, and carriers such as insects and aerosols, as well as the physiological status of the bird under certain circumstances like those occurring during times of stress (Pillai and Ricke, 2002;Maciorowski et al, 2004;Park et al, 2008;Dunkley et al, 2009;Finstad et al, 2012;Ricke, 2014). Much of the risk of exposure is subject to a number of factors including contaminated feeds, vectors, and carriers such as insects and aerosols, as well as the physiological status of the bird under certain circumstances like those occurring during times of stress (Pillai and Ricke, 2002;Maciorowski et al, 2004;Park et al, 2008;Dunkley et al, 2009;Finstad et al, 2012;Ricke, 2014).…”

Section: Poultry Processing and Sources Of Microbial Contaminationmentioning

confidence: 99%