Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America

ABSTRACT Two separate human outbreaks of Salmonella enterica serotype Reading occurred between 2017 and 2019 in the United States and Canada, and both outbreaks were linked to the consumption of raw turkey products. In this study, a comprehensive genomic investigation was conducted to reconstruct th...

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Autores principales: Elizabeth A. Miller, Ehud Elnekave, Cristian Flores-Figueroa, Abigail Johnson, Ashley Kearney, Jeannette Munoz-Aguayo, Kaitlin A. Tagg, Lorelee Tschetter, Bonnie P. Weber, Celine A. Nadon, Dave Boxrud, Randall S. Singer, Jason P. Folster, Timothy J. Johnson
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Publicado: American Society for Microbiology 2020
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spelling oai:doaj.org-article:5c87c6389c2640238605f63c6c2e4a6c2021-11-15T15:29:16ZEmergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America10.1128/mSphere.00056-202379-5042https://doaj.org/article/5c87c6389c2640238605f63c6c2e4a6c2020-04-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mSphere.00056-20https://doaj.org/toc/2379-5042ABSTRACT Two separate human outbreaks of Salmonella enterica serotype Reading occurred between 2017 and 2019 in the United States and Canada, and both outbreaks were linked to the consumption of raw turkey products. In this study, a comprehensive genomic investigation was conducted to reconstruct the evolutionary history of S. Reading from turkeys and to determine the genomic context of outbreaks involving this infrequently isolated Salmonella serotype. A total of 988 isolates of U.S. origin were examined using whole-genome-based approaches, including current and historical isolates from humans, meat, and live food animals. Broadly, isolates clustered into three major clades, with one apparently highly adapted turkey clade. Within the turkey clade, isolates clustered into three subclades, including an “emergent” clade that contained only isolates dated 2016 or later, with many of the isolates from these outbreaks. Genomic differences were identified between emergent and other turkey subclades, suggesting that the apparent success of currently circulating subclades is, in part, attributable to plasmid acquisitions conferring antimicrobial resistance, gain of phage-like sequences with cargo virulence factors, and mutations in systems that may be involved in beta-glucuronidase activity and resistance towards colicins. U.S. and Canadian outbreak isolates were found interspersed throughout the emergent subclade and the other circulating subclade. The emergence of a novel S. Reading turkey subclade, coinciding temporally with expansion in commercial turkey production and with U.S. and Canadian human outbreaks, indicates that emergent strains with higher potential for niche success were likely vertically transferred and rapidly disseminated from a common source. IMPORTANCE Increasingly, outbreak investigations involving foodborne pathogens are difficult due to the interconnectedness of food animal production and distribution, and homogeneous nature of industry integration, necessitating high-resolution genomic investigations to determine their basis. Fortunately, surveillance and whole-genome sequencing, combined with the public availability of these data, enable comprehensive queries to determine underlying causes of such outbreaks. Utilizing this pipeline, it was determined that a novel clone of Salmonella Reading has emerged that coincided with increased abundance in raw turkey products and two outbreaks of human illness in North America. The rapid dissemination of this highly adapted and conserved clone indicates that it was likely obtained from a common source and rapidly disseminated across turkey production. Key genomic changes may have contributed to its apparent continued success in commercial turkeys and ability to cause illness in humans.Elizabeth A. MillerEhud ElnekaveCristian Flores-FigueroaAbigail JohnsonAshley KearneyJeannette Munoz-AguayoKaitlin A. TaggLorelee TschetterBonnie P. WeberCeline A. NadonDave BoxrudRandall S. SingerJason P. FolsterTimothy J. JohnsonAmerican Society for MicrobiologyarticleSalmonellaclonegenomichumanoutbreakpoultryMicrobiologyQR1-502ENmSphere, Vol 5, Iss 2 (2020)
institution DOAJ
collection DOAJ
language EN
topic Salmonella
clone
genomic
human
outbreak
poultry
Microbiology
QR1-502
spellingShingle Salmonella
clone
genomic
human
outbreak
poultry
Microbiology
QR1-502
Elizabeth A. Miller
Ehud Elnekave
Cristian Flores-Figueroa
Abigail Johnson
Ashley Kearney
Jeannette Munoz-Aguayo
Kaitlin A. Tagg
Lorelee Tschetter
Bonnie P. Weber
Celine A. Nadon
Dave Boxrud
Randall S. Singer
Jason P. Folster
Timothy J. Johnson
Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
description ABSTRACT Two separate human outbreaks of Salmonella enterica serotype Reading occurred between 2017 and 2019 in the United States and Canada, and both outbreaks were linked to the consumption of raw turkey products. In this study, a comprehensive genomic investigation was conducted to reconstruct the evolutionary history of S. Reading from turkeys and to determine the genomic context of outbreaks involving this infrequently isolated Salmonella serotype. A total of 988 isolates of U.S. origin were examined using whole-genome-based approaches, including current and historical isolates from humans, meat, and live food animals. Broadly, isolates clustered into three major clades, with one apparently highly adapted turkey clade. Within the turkey clade, isolates clustered into three subclades, including an “emergent” clade that contained only isolates dated 2016 or later, with many of the isolates from these outbreaks. Genomic differences were identified between emergent and other turkey subclades, suggesting that the apparent success of currently circulating subclades is, in part, attributable to plasmid acquisitions conferring antimicrobial resistance, gain of phage-like sequences with cargo virulence factors, and mutations in systems that may be involved in beta-glucuronidase activity and resistance towards colicins. U.S. and Canadian outbreak isolates were found interspersed throughout the emergent subclade and the other circulating subclade. The emergence of a novel S. Reading turkey subclade, coinciding temporally with expansion in commercial turkey production and with U.S. and Canadian human outbreaks, indicates that emergent strains with higher potential for niche success were likely vertically transferred and rapidly disseminated from a common source. IMPORTANCE Increasingly, outbreak investigations involving foodborne pathogens are difficult due to the interconnectedness of food animal production and distribution, and homogeneous nature of industry integration, necessitating high-resolution genomic investigations to determine their basis. Fortunately, surveillance and whole-genome sequencing, combined with the public availability of these data, enable comprehensive queries to determine underlying causes of such outbreaks. Utilizing this pipeline, it was determined that a novel clone of Salmonella Reading has emerged that coincided with increased abundance in raw turkey products and two outbreaks of human illness in North America. The rapid dissemination of this highly adapted and conserved clone indicates that it was likely obtained from a common source and rapidly disseminated across turkey production. Key genomic changes may have contributed to its apparent continued success in commercial turkeys and ability to cause illness in humans.
format article
author Elizabeth A. Miller
Ehud Elnekave
Cristian Flores-Figueroa
Abigail Johnson
Ashley Kearney
Jeannette Munoz-Aguayo
Kaitlin A. Tagg
Lorelee Tschetter
Bonnie P. Weber
Celine A. Nadon
Dave Boxrud
Randall S. Singer
Jason P. Folster
Timothy J. Johnson
author_facet Elizabeth A. Miller
Ehud Elnekave
Cristian Flores-Figueroa
Abigail Johnson
Ashley Kearney
Jeannette Munoz-Aguayo
Kaitlin A. Tagg
Lorelee Tschetter
Bonnie P. Weber
Celine A. Nadon
Dave Boxrud
Randall S. Singer
Jason P. Folster
Timothy J. Johnson
author_sort Elizabeth A. Miller
title Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
title_short Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
title_full Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
title_fullStr Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
title_full_unstemmed Emergence of a Novel <named-content content-type="genus-species">Salmonella enterica</named-content> Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
title_sort emergence of a novel <named-content content-type="genus-species">salmonella enterica</named-content> serotype reading clonal group is linked to its expansion in commercial turkey production, resulting in unanticipated human illness in north america
publisher American Society for Microbiology
publishDate 2020
url https://doaj.org/article/5c87c6389c2640238605f63c6c2e4a6c
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