Estimation of sample sizes for pooled faecal sampling for detection of Salmonella in pigs
Salmonella infection in breeding pigs was the subject of a European survey in 2008. The prevalence of pig-breeding holdings infected with Salmonella was determined by microbiological culture of pooled pen faecal samples. The objective of this study was to estimate the sensitivity of pooled faecal sa...
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| Veröffentlicht in: | Epidemiology and infection 2009-12, Vol.137 (12), p.1734-1741 |
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| creator | ARNOLD, M. E. COOK, A. J. C. |
| description | Salmonella infection in breeding pigs was the subject of a European survey in 2008. The prevalence of pig-breeding holdings infected with Salmonella was determined by microbiological culture of pooled pen faecal samples. The objective of this study was to estimate the sensitivity of pooled faecal sampling and to calculate the required sample sizes. To do this, individuai and pooled faecal samples were collected from a sample of pens from nine farms. Bayesian methods were used to estimate the sensitivity of individuai and pooled faecal sampling, and the degree of clustering of Salmonella at the pen level. Sample sizes were then calculated for various values of design prevalence, taking into account the clustering. Pooling was highly efficient compared to individuai sampling, e. g. with 18 pooled samples required to detect a 10% prevalence with 95% certainty, compared to 35 individuai rectal samples. We recommend that pooled sampling is used for détection of Salmonella in pigs. Results were influenced by the degree of clustering at pen level, and it is important to take this into account both in the estimation of appropriate sample sizes and the estimation of prevalence from pooled sample data. |
| doi_str_mv | 10.1017/S0950268809002702 |
| format | Article |
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E. ; COOK, A. J. C.</creator><creatorcontrib>ARNOLD, M. E. ; COOK, A. J. C.</creatorcontrib><description>Salmonella infection in breeding pigs was the subject of a European survey in 2008. The prevalence of pig-breeding holdings infected with Salmonella was determined by microbiological culture of pooled pen faecal samples. The objective of this study was to estimate the sensitivity of pooled faecal sampling and to calculate the required sample sizes. To do this, individuai and pooled faecal samples were collected from a sample of pens from nine farms. Bayesian methods were used to estimate the sensitivity of individuai and pooled faecal sampling, and the degree of clustering of Salmonella at the pen level. Sample sizes were then calculated for various values of design prevalence, taking into account the clustering. Pooling was highly efficient compared to individuai sampling, e. g. with 18 pooled samples required to detect a 10% prevalence with 95% certainty, compared to 35 individuai rectal samples. We recommend that pooled sampling is used for détection of Salmonella in pigs. Results were influenced by the degree of clustering at pen level, and it is important to take this into account both in the estimation of appropriate sample sizes and the estimation of prevalence from pooled sample data.</description><identifier>ISSN: 0950-2688</identifier><identifier>EISSN: 1469-4409</identifier><identifier>DOI: 10.1017/S0950268809002702</identifier><identifier>PMID: 19416556</identifier><identifier>CODEN: EPINEU</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Animals ; Bacteriology ; Bayes Theorem ; Bayesian analysis ; Biological and medical sciences ; Data sampling ; Epidemiology ; Europe - epidemiology ; Feces - microbiology ; Fundamental and applied biological sciences. Psychology ; Herds ; Infections ; mathematical modelling ; Microbiology ; Miscellaneous ; Models, Biological ; Prevalence ; Proportions ; Salmonella ; Salmonella - isolation & purification ; Salmonella Infections, Animal - diagnosis ; Salmonella Infections, Animal - epidemiology ; Sample Size ; Sensitivity and Specificity ; Specimen Handling ; surveillance ; Swine ; Swine Diseases - epidemiology ; Swine Diseases - microbiology ; Veterinary medicine ; Zoonoses</subject><ispartof>Epidemiology and infection, 2009-12, Vol.137 (12), p.1734-1741</ispartof><rights>Copyright 2009 Cambridge University Press</rights><rights>2009 INIST-CNRS</rights><rights>Copyright © Cambridge University Press 2009</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c538t-2ad15e388473e7e896987d8d9235929029c88f5cb48a9e8fc3e1ba698437e2313</citedby><cites>FETCH-LOGICAL-c538t-2ad15e388473e7e896987d8d9235929029c88f5cb48a9e8fc3e1ba698437e2313</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/40390508$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/40390508$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,27901,27902,57992,58225</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22081441$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19416556$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>ARNOLD, M. E.</creatorcontrib><creatorcontrib>COOK, A. J. C.</creatorcontrib><title>Estimation of sample sizes for pooled faecal sampling for detection of Salmonella in pigs</title><title>Epidemiology and infection</title><addtitle>Epidemiol. Infect</addtitle><description>Salmonella infection in breeding pigs was the subject of a European survey in 2008. The prevalence of pig-breeding holdings infected with Salmonella was determined by microbiological culture of pooled pen faecal samples. The objective of this study was to estimate the sensitivity of pooled faecal sampling and to calculate the required sample sizes. To do this, individuai and pooled faecal samples were collected from a sample of pens from nine farms. Bayesian methods were used to estimate the sensitivity of individuai and pooled faecal sampling, and the degree of clustering of Salmonella at the pen level. Sample sizes were then calculated for various values of design prevalence, taking into account the clustering. Pooling was highly efficient compared to individuai sampling, e. g. with 18 pooled samples required to detect a 10% prevalence with 95% certainty, compared to 35 individuai rectal samples. We recommend that pooled sampling is used for détection of Salmonella in pigs. Results were influenced by the degree of clustering at pen level, and it is important to take this into account both in the estimation of appropriate sample sizes and the estimation of prevalence from pooled sample data.</description><subject>Animals</subject><subject>Bacteriology</subject><subject>Bayes Theorem</subject><subject>Bayesian analysis</subject><subject>Biological and medical sciences</subject><subject>Data sampling</subject><subject>Epidemiology</subject><subject>Europe - epidemiology</subject><subject>Feces - microbiology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Herds</subject><subject>Infections</subject><subject>mathematical modelling</subject><subject>Microbiology</subject><subject>Miscellaneous</subject><subject>Models, Biological</subject><subject>Prevalence</subject><subject>Proportions</subject><subject>Salmonella</subject><subject>Salmonella - isolation & purification</subject><subject>Salmonella Infections, Animal - diagnosis</subject><subject>Salmonella Infections, Animal - epidemiology</subject><subject>Sample Size</subject><subject>Sensitivity and Specificity</subject><subject>Specimen Handling</subject><subject>surveillance</subject><subject>Swine</subject><subject>Swine Diseases - epidemiology</subject><subject>Swine Diseases - microbiology</subject><subject>Veterinary medicine</subject><subject>Zoonoses</subject><issn>0950-2688</issn><issn>1469-4409</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNqFkU1v1DAQhi1ERZfCD-AAipDgFhh_20dUSrfSSgiVD3GyvMmkypLEwc5KwK-vQ7aLBAdOPjzPO_K8Q8gTCq8oUP36GqwEpowBC8A0sHtkRYWypRBg75PVjMuZn5KHKe0AwDKjH5BTagVVUqoV-XqRprb3UxuGIjRF8v3YYZHaX5iKJsRiDKHDumg8Vr5bcDvc_EY1TljdBa9914cBu84X7VCM7U16RE4a3yV8fHjPyKd3Fx_P1-Xm_eXV-ZtNWUluppL5mkrkxgjNUaOxyhpdm9oyLi2zwGxlTCOrrTDeomkqjnTrsyS4RsYpPyMvl7ljDN_3mCbXt6mafzJg2CenlOLGav1fkVGWG2Iii8__EndhH4e8hGMg5azMEl2kKoaUIjZujLnI-NNRcPN13D_XyZlnh8H7bY_1n8ThHFl4cRB8yn030Q9Vm44eY2CoEPPOTxdvl6YQj1wAtyDBZF4uvE0T_jhyH785pbmWTl1-cJvNF_aZrtfuLb8F9A-ttQ</recordid><startdate>20091201</startdate><enddate>20091201</enddate><creator>ARNOLD, M. 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E. ; COOK, A. J. C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c538t-2ad15e388473e7e896987d8d9235929029c88f5cb48a9e8fc3e1ba698437e2313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Animals</topic><topic>Bacteriology</topic><topic>Bayes Theorem</topic><topic>Bayesian analysis</topic><topic>Biological and medical sciences</topic><topic>Data sampling</topic><topic>Epidemiology</topic><topic>Europe - epidemiology</topic><topic>Feces - microbiology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Herds</topic><topic>Infections</topic><topic>mathematical modelling</topic><topic>Microbiology</topic><topic>Miscellaneous</topic><topic>Models, Biological</topic><topic>Prevalence</topic><topic>Proportions</topic><topic>Salmonella</topic><topic>Salmonella - isolation & purification</topic><topic>Salmonella Infections, Animal - diagnosis</topic><topic>Salmonella Infections, Animal - epidemiology</topic><topic>Sample Size</topic><topic>Sensitivity and Specificity</topic><topic>Specimen Handling</topic><topic>surveillance</topic><topic>Swine</topic><topic>Swine Diseases - epidemiology</topic><topic>Swine Diseases - microbiology</topic><topic>Veterinary medicine</topic><topic>Zoonoses</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>ARNOLD, M. E.</creatorcontrib><creatorcontrib>COOK, A. J. 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E.</au><au>COOK, A. J. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Estimation of sample sizes for pooled faecal sampling for detection of Salmonella in pigs</atitle><jtitle>Epidemiology and infection</jtitle><addtitle>Epidemiol. Infect</addtitle><date>2009-12-01</date><risdate>2009</risdate><volume>137</volume><issue>12</issue><spage>1734</spage><epage>1741</epage><pages>1734-1741</pages><issn>0950-2688</issn><eissn>1469-4409</eissn><coden>EPINEU</coden><abstract>Salmonella infection in breeding pigs was the subject of a European survey in 2008. The prevalence of pig-breeding holdings infected with Salmonella was determined by microbiological culture of pooled pen faecal samples. The objective of this study was to estimate the sensitivity of pooled faecal sampling and to calculate the required sample sizes. To do this, individuai and pooled faecal samples were collected from a sample of pens from nine farms. Bayesian methods were used to estimate the sensitivity of individuai and pooled faecal sampling, and the degree of clustering of Salmonella at the pen level. Sample sizes were then calculated for various values of design prevalence, taking into account the clustering. Pooling was highly efficient compared to individuai sampling, e. g. with 18 pooled samples required to detect a 10% prevalence with 95% certainty, compared to 35 individuai rectal samples. We recommend that pooled sampling is used for détection of Salmonella in pigs. Results were influenced by the degree of clustering at pen level, and it is important to take this into account both in the estimation of appropriate sample sizes and the estimation of prevalence from pooled sample data.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><pmid>19416556</pmid><doi>10.1017/S0950268809002702</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Animals Bacteriology Bayes Theorem Bayesian analysis Biological and medical sciences Data sampling Epidemiology Europe - epidemiology Feces - microbiology Fundamental and applied biological sciences. Psychology Herds Infections mathematical modelling Microbiology Miscellaneous Models, Biological Prevalence Proportions Salmonella Salmonella - isolation & purification Salmonella Infections, Animal - diagnosis Salmonella Infections, Animal - epidemiology Sample Size Sensitivity and Specificity Specimen Handling surveillance Swine Swine Diseases - epidemiology Swine Diseases - microbiology Veterinary medicine Zoonoses |
| title | Estimation of sample sizes for pooled faecal sampling for detection of Salmonella in pigs |
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