Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain

L. Heres, M. Swanenburg, A.A. de Koeijer, G.J. Boender, D. Oorburg, B. Urlings, H.J. Wisselink

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

Toxoplasma gondii is recognized as one of the major foodborne pathogens. The European Food Safety Authority (EFSA) concluded that T. gondii is one of the public health hazards in pigs to be covered within a modern meat inspection and advised to include serological testing of pigs and audits of pig farms to control T. gondii. A project is presented that develops a framework where this idea is practically implemented in a pork supply chain. The aim of the program is to reduce the contribution from the pork chain to the human toxoplasmosis disease burden. In the pilot at least one blood sample per batch at delivery at the slaughterhouse is tested with a Toxoplasma Elisa. With this screening 20 (1%) high risk herds were identified. These high risk farms and their controls, 2 per high risk farm, were followed up. More samples of risk farms and their controls were collected to get a better estimate of the within herd prevalence and to follow the development of serology over time. Additional MC-PCR was performed on hearts of pigs from these herds to confirm presence of infection, tissue cysts. Also farm assessments were done to verify the presence of risk factors at the identified farms. In the first farm where hearts were tested by PCR the presence of toxoplasma tissue cysts was shown. The results give insight in how risk based approaches with food chain information (FCI) for animals sent to slaughter could work, by substantiating how risk herds can be practically identified and which interventions are feasible. The results are discussed in the perspective of human health risks.
Original languageEnglish
Title of host publicationSafepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain
Subtitle of host publicationSAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal
Pages81-84
Publication statusPublished - 2015
EventSafepork 2015 - Porto, Portugal
Duration: 1 Sep 20154 Sep 2015

Conference

ConferenceSafepork 2015
CountryPortugal
CityPorto
Period1/09/154/09/15

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supply chain
Toxoplasma gondii
pork
farms
herds
Toxoplasma
swine
heart
meat inspection
burden of disease
audits
health hazards
toxoplasmosis
food pathogens
food chain
slaughterhouses
food safety
human health
public health
slaughter

Cite this

Heres, L., Swanenburg, M., de Koeijer, A. A., Boender, G. J., Oorburg, D., Urlings, B., & Wisselink, H. J. (2015). Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain. In Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain: SAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal (pp. 81-84)
Heres, L. ; Swanenburg, M. ; de Koeijer, A.A. ; Boender, G.J. ; Oorburg, D. ; Urlings, B. ; Wisselink, H.J. / Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain. Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain: SAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal. 2015. pp. 81-84
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title = "Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain",
abstract = "Toxoplasma gondii is recognized as one of the major foodborne pathogens. The European Food Safety Authority (EFSA) concluded that T. gondii is one of the public health hazards in pigs to be covered within a modern meat inspection and advised to include serological testing of pigs and audits of pig farms to control T. gondii. A project is presented that develops a framework where this idea is practically implemented in a pork supply chain. The aim of the program is to reduce the contribution from the pork chain to the human toxoplasmosis disease burden. In the pilot at least one blood sample per batch at delivery at the slaughterhouse is tested with a Toxoplasma Elisa. With this screening 20 (1{\%}) high risk herds were identified. These high risk farms and their controls, 2 per high risk farm, were followed up. More samples of risk farms and their controls were collected to get a better estimate of the within herd prevalence and to follow the development of serology over time. Additional MC-PCR was performed on hearts of pigs from these herds to confirm presence of infection, tissue cysts. Also farm assessments were done to verify the presence of risk factors at the identified farms. In the first farm where hearts were tested by PCR the presence of toxoplasma tissue cysts was shown. The results give insight in how risk based approaches with food chain information (FCI) for animals sent to slaughter could work, by substantiating how risk herds can be practically identified and which interventions are feasible. The results are discussed in the perspective of human health risks.",
author = "L. Heres and M. Swanenburg and {de Koeijer}, A.A. and G.J. Boender and D. Oorburg and B. Urlings and H.J. Wisselink",
year = "2015",
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Heres, L, Swanenburg, M, de Koeijer, AA, Boender, GJ, Oorburg, D, Urlings, B & Wisselink, HJ 2015, Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain. in Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain: SAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal. pp. 81-84, Safepork 2015, Porto, Portugal, 1/09/15.

Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain. / Heres, L.; Swanenburg, M.; de Koeijer, A.A.; Boender, G.J.; Oorburg, D.; Urlings, B.; Wisselink, H.J.

Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain: SAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal. 2015. p. 81-84.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

TY - GEN

T1 - Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain

AU - Heres, L.

AU - Swanenburg, M.

AU - de Koeijer, A.A.

AU - Boender, G.J.

AU - Oorburg, D.

AU - Urlings, B.

AU - Wisselink, H.J.

PY - 2015

Y1 - 2015

N2 - Toxoplasma gondii is recognized as one of the major foodborne pathogens. The European Food Safety Authority (EFSA) concluded that T. gondii is one of the public health hazards in pigs to be covered within a modern meat inspection and advised to include serological testing of pigs and audits of pig farms to control T. gondii. A project is presented that develops a framework where this idea is practically implemented in a pork supply chain. The aim of the program is to reduce the contribution from the pork chain to the human toxoplasmosis disease burden. In the pilot at least one blood sample per batch at delivery at the slaughterhouse is tested with a Toxoplasma Elisa. With this screening 20 (1%) high risk herds were identified. These high risk farms and their controls, 2 per high risk farm, were followed up. More samples of risk farms and their controls were collected to get a better estimate of the within herd prevalence and to follow the development of serology over time. Additional MC-PCR was performed on hearts of pigs from these herds to confirm presence of infection, tissue cysts. Also farm assessments were done to verify the presence of risk factors at the identified farms. In the first farm where hearts were tested by PCR the presence of toxoplasma tissue cysts was shown. The results give insight in how risk based approaches with food chain information (FCI) for animals sent to slaughter could work, by substantiating how risk herds can be practically identified and which interventions are feasible. The results are discussed in the perspective of human health risks.

AB - Toxoplasma gondii is recognized as one of the major foodborne pathogens. The European Food Safety Authority (EFSA) concluded that T. gondii is one of the public health hazards in pigs to be covered within a modern meat inspection and advised to include serological testing of pigs and audits of pig farms to control T. gondii. A project is presented that develops a framework where this idea is practically implemented in a pork supply chain. The aim of the program is to reduce the contribution from the pork chain to the human toxoplasmosis disease burden. In the pilot at least one blood sample per batch at delivery at the slaughterhouse is tested with a Toxoplasma Elisa. With this screening 20 (1%) high risk herds were identified. These high risk farms and their controls, 2 per high risk farm, were followed up. More samples of risk farms and their controls were collected to get a better estimate of the within herd prevalence and to follow the development of serology over time. Additional MC-PCR was performed on hearts of pigs from these herds to confirm presence of infection, tissue cysts. Also farm assessments were done to verify the presence of risk factors at the identified farms. In the first farm where hearts were tested by PCR the presence of toxoplasma tissue cysts was shown. The results give insight in how risk based approaches with food chain information (FCI) for animals sent to slaughter could work, by substantiating how risk herds can be practically identified and which interventions are feasible. The results are discussed in the perspective of human health risks.

M3 - Conference contribution

SN - 9789897040306

SP - 81

EP - 84

BT - Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain

ER -

Heres L, Swanenburg M, de Koeijer AA, Boender GJ, Oorburg D, Urlings B et al. Design of a Risk based Control System for Toxoplasma gondii in a pork supply chain. In Safepork 2015 Proceedings Book: Epidemiology and control of hazards in pork production chain: SAFEPORK, One health approach under a concept of farm to fork, Septembre 2015 Porto - Portugal. 2015. p. 81-84