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Comparison of Salmonella Enteritidis phage types isolated from layers and humans in Belgium in 2005

Sarah Welby, Hein Imberechts, Flavien Riocreux, Sophie Bertrand, Katelijne Dierick, Christa Wildemauwe, Jozef Hooyberghs and Yves Van der Stede UGent (2011) FOODBORNE PATHOGENS AND DISEASE. 8(8). p.929-934
abstract
Objectives: The aim of this study was to investigate the available results for Belgium of the European Union coordinated monitoring program (2004/665 EC) on Salmonella in layers in 2005, as well as the results of the monthly outbreak reports of Salmonella Enteritidis in humans in 2005 to identify a possible statistical significant trend in both populations. Materials and Methods: Separate descriptive statistics and univariate analysis were carried out and the parametric and/or non-parametric hypothesis tests were conducted. A time cluster analysis was performed for all Salmonella Enteritidis phage types (PTs) isolated. The proportions of each Salmonella Enteritidis PT in layers and in humans were compared and the monthly distribution of the most common PT, isolated in both populations, was evaluated. Results: The time cluster analysis revealed significant clusters during the months May and June for layers and May, July, August, and September for humans. PT21, the most frequently isolated PT in both populations in 2005, seemed to be responsible of these significant clusters. PT4 was the second most frequently isolated PT. No significant difference was found for the monthly trend evolution of both PT in both populations based on parametric and non-parametric methods. Discussion and Conclusion: A similar monthly trend of PT distribution in humans and layers during the year 2005 was observed. The time cluster analysis and the statistical significance testing confirmed these results. Moreover, the time cluster analysis showed significant clusters during the summer time and slightly delayed in time (humans after layers). These results suggest a common link between the prevalence of Salmonella Enteritidis in layers and the occurrence of the pathogen in humans. Phage typing was confirmed to be a useful tool for identifying temporal trends.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
PORK MEAT, FOOD, UNITED-STATES, LAYING FLOCKS, ILLNESS, SEROTYPE, INFECTIONS, OUTBREAKS, CHICKENS, POULTRY
journal title
FOODBORNE PATHOGENS AND DISEASE
Foodborne Pathog. Dis.
volume
8
issue
8
pages
929 - 934
Web of Science type
Article
Web of Science id
000292867700011
JCR category
FOOD SCIENCE & TECHNOLOGY
JCR impact factor
2.26 (2011)
JCR rank
27/128 (2011)
JCR quartile
1 (2011)
ISSN
1535-3141
DOI
10.1089/fpd.2010.0834
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1988992
handle
http://hdl.handle.net/1854/LU-1988992
date created
2012-01-17 10:24:03
date last changed
2012-01-31 13:56:19
@article{1988992,
  abstract     = {Objectives: The aim of this study was to investigate the available results for Belgium of the European Union coordinated monitoring program (2004/665 EC) on Salmonella in layers in 2005, as well as the results of the monthly outbreak reports of Salmonella Enteritidis in humans in 2005 to identify a possible statistical significant trend in both populations. 
Materials and Methods: Separate descriptive statistics and univariate analysis were carried out and the parametric and/or non-parametric hypothesis tests were conducted. A time cluster analysis was performed for all Salmonella Enteritidis phage types (PTs) isolated. The proportions of each Salmonella Enteritidis PT in layers and in humans were compared and the monthly distribution of the most common PT, isolated in both populations, was evaluated. 
Results: The time cluster analysis revealed significant clusters during the months May and June for layers and May, July, August, and September for humans. PT21, the most frequently isolated PT in both populations in 2005, seemed to be responsible of these significant clusters. PT4 was the second most frequently isolated PT. No significant difference was found for the monthly trend evolution of both PT in both populations based on parametric and non-parametric methods. 
Discussion and Conclusion: A similar monthly trend of PT distribution in humans and layers during the year 2005 was observed. The time cluster analysis and the statistical significance testing confirmed these results. Moreover, the time cluster analysis showed significant clusters during the summer time and slightly delayed in time (humans after layers). These results suggest a common link between the prevalence of Salmonella Enteritidis in layers and the occurrence of the pathogen in humans. Phage typing was confirmed to be a useful tool for identifying temporal trends.},
  author       = {Welby, Sarah and Imberechts, Hein and Riocreux, Flavien and Bertrand, Sophie and Dierick, Katelijne and Wildemauwe, Christa and Hooyberghs, Jozef and Van der Stede, Yves},
  issn         = {1535-3141},
  journal      = {FOODBORNE PATHOGENS AND DISEASE},
  keyword      = {PORK MEAT,FOOD,UNITED-STATES,LAYING FLOCKS,ILLNESS,SEROTYPE,INFECTIONS,OUTBREAKS,CHICKENS,POULTRY},
  language     = {eng},
  number       = {8},
  pages        = {929--934},
  title        = {Comparison of Salmonella Enteritidis phage types isolated from layers and humans in Belgium in 2005},
  url          = {http://dx.doi.org/10.1089/fpd.2010.0834},
  volume       = {8},
  year         = {2011},
}

Chicago
Welby, Sarah, Hein Imberechts, Flavien Riocreux, Sophie Bertrand, Katelijne Dierick, Christa Wildemauwe, Jozef Hooyberghs, and Yves Van der Stede. 2011. “Comparison of Salmonella Enteritidis Phage Types Isolated from Layers and Humans in Belgium in 2005.” Foodborne Pathogens and Disease 8 (8): 929–934.
APA
Welby, S., Imberechts, H., Riocreux, F., Bertrand, S., Dierick, K., Wildemauwe, C., Hooyberghs, J., et al. (2011). Comparison of Salmonella Enteritidis phage types isolated from layers and humans in Belgium in 2005. FOODBORNE PATHOGENS AND DISEASE, 8(8), 929–934.
Vancouver
1.
Welby S, Imberechts H, Riocreux F, Bertrand S, Dierick K, Wildemauwe C, et al. Comparison of Salmonella Enteritidis phage types isolated from layers and humans in Belgium in 2005. FOODBORNE PATHOGENS AND DISEASE. 2011;8(8):929–34.
MLA
Welby, Sarah, Hein Imberechts, Flavien Riocreux, et al. “Comparison of Salmonella Enteritidis Phage Types Isolated from Layers and Humans in Belgium in 2005.” FOODBORNE PATHOGENS AND DISEASE 8.8 (2011): 929–934. Print.