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| Kijlstra, A.; Traag, W. A.; Hoogenboom, L. A. P.. |
| To decrease dioxin uptake by the general population the European Union (EU) has set limits to the dioxin content of many foodstuffs including eggs. Eggs from free foraging chickens are known to have a higher dioxin content as compared to confined laying hens and it is the question whether these eggs can adhere to current EU regulations. The aim of the study was to investigate parameters that are involved in the contamination of eggs from chickens raised under “organic” conditions. Samples from 34 organic farms including soil and earth worm samples were collected between September and December of the year 2003. Dioxin levels were assayed by GC/MS. Various parameters were collected by on farm interviews. Egg dioxin content varied between 0.4 and 8.1 pg... |
| Tipo: Journal paper |
Palavras-chave: Poultry. |
| Ano: 2007 |
URL: http://orgprints.org/11254/1/Abstract.doc |
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| Kijlstra, A.; Cornelissen, J.B.; Meerburg, B.G.. |
| A short written questionnaire was used to study certain characteristics of the organic pig production chain in The Netherlands and the circumstances on the farm that might play a role in the transmission of Toxoplasma infection to the pigs. Of the 81 certified organic slaughter pig farmers present in the Netherlands in 2006, 52 responded to the questionnaire (64 % response). The farms could be divided into two populations. One population was represented by small organic pig farms with a mean number of 55 slaughtered pigs per year. These farms covered 40% of the total number of investigated farms, but only represented 2.5 % of the total number of slaughtered pigs. The second population had a mean annual production of 1460 animals. Almost 95% of these... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pigs. |
| Ano: 2007 |
URL: http://orgprints.org/10137/1/kijlstra%2Detal%2D2007%2Dtaxoplasma_pig%2Dproduction.pdf |
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| Meerburg, B.G.; Van Riel, J.W.; Cornelissen, J.B.; Kijlstra, A.; Mul, M.F.. |
| In organic livestock production systems, farm-management factors are thought to play an important role in the on-farm prevalence of Toxoplasma gondii. Serological results and the results of an HACCP analysis were combined to determine important risk factors for the prevalence of this protozoan parasite. Mathematical analysis demonstrated that feeding goat whey to pigs and the presence of a high number of cats were positively correlated to T. gondii seroprevalence in pigs. Not covering roughage and the farmers' assumption that pigs can come into contact with cat feces also showed a positive relationship. In order to decrease the risk of T. gondii infecting their pigs, farmers should limit the access and number of cats on their farms and refrain from feeding... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Pigs. |
| Ano: 2006 |
URL: http://orgprints.org/10723/1/vbz.2006.6.pdf |
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