Recovery of a marker strain of<i>Salmonella typhimurium</i>in litter and aerosols from isolation rooms containing infected chickens

Kwon, Yong-Kook; Woodward, C.L.; Corrier, D. E.; Byrd, J. A.; Pillai, Suresh D.; Ricke, Steven C.

doi:10.1080/03601230009373287

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…This earlier study (24) clearly demonstrated a litteraerosol link, a link also observed in the present study. In a cage production situation, excreted salmonellas have been suggested to show increased survival in nest boxes due to the body heat of the birds and protection via the organic matter in feed or dust (12), a possible reason for the good survival of E. coli in litter in the present study.…”

Section: Discussionsupporting

confidence: 65%

Mechanically Ventilated Broiler Sheds: a Possible Source of AerosolizedSalmonella,Campylobacter, andEscherichia coli

Chinivasagam¹,

Tran²,

Maddock³

et al. 2009

Appl Environ Microbiol

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This study assessed the levels of two key pathogens, Salmonella and Campylobacter, along with the indicator organism Escherichia coli in aerosols within and outside poultry sheds. The study ranged over a 3-year period on four poultry farms and consisted of six trials across the boiler production cycle of around 55 days. Weekly testing of litter and aerosols was carried out through the cycle. A key point that emerged is that the levels of airborne bacteria are linked to the levels of these bacteria in litter. This hypothesis was demonstrated by E. coli. ). The Salmonella serovars isolated in litter were generally also isolated from aerosols and dust, with the Salmonella serovars Chester and Sofia being the dominant serovars across these interfaces. Campylobacter was detected late in the production cycle, in litter at levels of around 10 7 MPN g ؊1 . Campylobacter was detected only once inside the shed and then at low levels of 2.2 MPN m ؊3 . Thus, the public health risk from these organisms in poultry environments via the aerosol pathway is minimal.

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Section: Discussionsupporting

confidence: 65%

Mechanically Ventilated Broiler Sheds: a Possible Source of AerosolizedSalmonella,Campylobacter, andEscherichia coli

Chinivasagam¹,

Tran²,

Maddock³

et al. 2009

Appl Environ Microbiol

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“…In addition to Salmonella vectors, environmental transmission routes (aerosols, water) and reservoirs such as litter and feed play a key role in this dissemination. Aerosols in particular have been identified in several studies as a transmission route not only in broiler and layer houses but in hatcheries as well [94][95][96][97][98]. Part of the issue with these sources is the ability of Salmonella to survive for fairly long periods of times in some of the reservoirs that vectors and other carriers such as aerosols carrying Salmonella come in contact with.…”

Section: Preharvest Contamination Routes: Broilersmentioning

confidence: 99%

Application of Molecular Approaches for Understanding Foodborne Salmonella Establishment in Poultry Production

Ricke

2014

Advances in Biology

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Salmonellosis in the United States is one of the most costly foodborne diseases. Given thatSalmonellacan originate from a wide variety of environments, reduction of this organism at all stages of poultry production is critical.Salmonellaspecies can encounter various environmental stress conditions which can dramatically influence their survival and colonization. Current knowledge ofSalmonellaspecies metabolism and physiology in relation to colonization is traditionally based on studies conducted primarily with tissue culture and animal infection models. Consequently, while there is some information about environmental signals that controlSalmonellagrowth and colonization, much still remains unknown. Genetic tools for comprehensive functional genomic analysis ofSalmonellaoffer new opportunities for not only achieving a better understanding ofSalmonellapathogens but also designing more effective intervention strategies. Now the function(s) of each single gene in theSalmonellagenome can be directly assessed and previously unknown genetic factors that are required forSalmonellagrowth and survival in the poultry production cycle can be elucidated. In particular, delineating the host-pathogen relationships involvingSalmonellais becoming very helpful for identifying optimal targeted gene mutagenesis strategies to generate improved vaccine strains. This represents an opportunity for development of novel vaccine approaches for limitingSalmonellaestablishment in early phases of poultry production. In this review, an overview ofSalmonellaissues in poultry, a general description of functional genomic technologies, and their specific application to poultry vaccine developments are discussed.

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“…have become a leading priority in the poultry industry. In the last few decades, many preventive and therapeutic approaches such as antibiotic use, chemical acidification, and vaccination have been developed to reduce the colonization and invasion by extraintestinal pathogens (Kwon et al, 2000;Dueger et al, 2003;Zhao et al, 2011). Despite their effectiveness, there still remain adverse outcomes of using these technologies, including the emergence of new antibiotic-resistant and acid-tolerant bacteria, the imbalance of indigenous intestinal microflora, and the limited efficacy of vaccine (Bach et al, 2002;Zou et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Influence of bacteriophage P22 on the inflammatory mediator gene expression in chicken macrophage HD11 cells infected withSalmonellaTyphimurium

Ahn

Biswas

2014

FEMS Microbiol Lett

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This study was designed to evaluate the effects of bacteriophage on the intracellular survival and immune mediator gene expression in chicken macrophage-like HD11 cells. The invasive ability and intracellular survival of Salmonella Typhimurium (ST(P22-) ) and lysogenic S. Typhimurium (ST(P22+) ) in HD11 cells were evaluated at 37 °C for 24 h postinfection (hpi). The expression of inflammatory mediator genes was determined in ST(P22-) - and ST(P22+) -infected HD11 cells treated with and without bacteriophage P22 at 1 and 24 hpi using quantitative RT-PCR. The ability of ST(P22-) and ST(P22+) to invade HD11 cells was significantly decreased by bacteriophage P22 at 1 hpi. The numbers of intracellular ST(P22-) and ST(P22+) were significantly decreased from 2.39 to 1.62 CFU cm(-2) and from 3.40 to 1.72 CFU cm(-2) in HD11 cells treated with bacteriophage P22, respectively, at 24 hpi. The enhanced expression of inflammatory mediators was observed in ST(P22-) - and ST(P22+) -infected HD11 cells treated with and without bacteriophage P22. These results suggest that the application of bacteriophage could be an effective way to control the intracellular infection.

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Recovery of a marker strain ofSalmonella typhimuriumin litter and aerosols from isolation rooms containing infected chickens

Cited by 10 publications

References 19 publications

Mechanically Ventilated Broiler Sheds: a Possible Source of AerosolizedSalmonella,Campylobacter, andEscherichia coli

Mechanically Ventilated Broiler Sheds: a Possible Source of AerosolizedSalmonella,Campylobacter, andEscherichia coli

Application of Molecular Approaches for Understanding Foodborne Salmonella Establishment in Poultry Production

Influence of bacteriophage P22 on the inflammatory mediator gene expression in chicken macrophage HD11 cells infected withSalmonellaTyphimurium

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