Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products

L.A.P. Hoogenboom, J.G. Bokhorst, M.D. Northolt, L.P.L. van de Vijver, N.J.G. Broex, D.J. Mevius

Research output: Contribution to journalArticleAcademicpeer-review

59 Citations (Scopus)

Abstract

Organic products were analysed for the presence of contaminants, microorganisms and antibiotic resistance and compared with those from conventional products. No differences were observed in the Fusarium toxins deoxynivalenol and zearalenone in organic and conventional wheat, during both a dry period and a very wet period which promoted the production of these toxins. Nitrate levels in head lettuce produced organically in the open field were much lower than those in conventional products. In iceberg lettuce and head lettuce from the greenhouse, no differences were detected. Organically produced carrots contained higher nitrate levels than conventional products. Both organic and conventional products contained no residues of non-polar pesticides above the legal limits, although some were detected in conventional lettuce. Organic products contained no elevated levels of heavy metals. Salmonella was detected in 30% of pig faeces samples obtained from 30 organic farms, similar to the incidence at conventional farms. At farms that switched to organic production more then 6 years ago no Salmonella was detected, with the exception of one stable with young pigs recently purchased from another farm. No Salmonella was detected in faeces at the nine farms with organic broilers, and at one out of ten farms with laying hens. This is comparable with conventional farms where the incidence for Salmonella lies around 10%. Campylobacter was detected in faeces at all organic broiler farms, being much higher than at conventional farms. One of the most remarkable results was the fact that faeces from organic pigs and broilers showed a much lower incidence of antibiotic resistant bacteria, except for Campylobacter in broilers. It is concluded that the organic products investigated scored as equally well as conventional products with regard to food safety and at the same time show some promising features with respect to antibiotic resistance.
Original languageEnglish
Pages (from-to)1195-1207
JournalFood Additives and Contaminants
Volume25
Issue number10
DOIs
Publication statusPublished - 2008

Fingerprint

Organic Food
organic foods
Microorganisms
Farms
Lettuce
foods
Impurities
Organic Agriculture
microorganisms
Feces
Salmonella
farms
Campylobacter
Swine
Microbial Drug Resistance
feces
broiler chickens
Nitrates
head lettuce
Incidence

Keywords

  • solid-phase extraction
  • bound metabolites
  • eggs
  • residues
  • wheat
  • campylobacter
  • mycotoxins
  • depletion
  • quality
  • tissues

Cite this

Hoogenboom, L.A.P. ; Bokhorst, J.G. ; Northolt, M.D. ; van de Vijver, L.P.L. ; Broex, N.J.G. ; Mevius, D.J. / Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products. In: Food Additives and Contaminants. 2008 ; Vol. 25, No. 10. pp. 1195-1207.
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title = "Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products",
abstract = "Organic products were analysed for the presence of contaminants, microorganisms and antibiotic resistance and compared with those from conventional products. No differences were observed in the Fusarium toxins deoxynivalenol and zearalenone in organic and conventional wheat, during both a dry period and a very wet period which promoted the production of these toxins. Nitrate levels in head lettuce produced organically in the open field were much lower than those in conventional products. In iceberg lettuce and head lettuce from the greenhouse, no differences were detected. Organically produced carrots contained higher nitrate levels than conventional products. Both organic and conventional products contained no residues of non-polar pesticides above the legal limits, although some were detected in conventional lettuce. Organic products contained no elevated levels of heavy metals. Salmonella was detected in 30{\%} of pig faeces samples obtained from 30 organic farms, similar to the incidence at conventional farms. At farms that switched to organic production more then 6 years ago no Salmonella was detected, with the exception of one stable with young pigs recently purchased from another farm. No Salmonella was detected in faeces at the nine farms with organic broilers, and at one out of ten farms with laying hens. This is comparable with conventional farms where the incidence for Salmonella lies around 10{\%}. Campylobacter was detected in faeces at all organic broiler farms, being much higher than at conventional farms. One of the most remarkable results was the fact that faeces from organic pigs and broilers showed a much lower incidence of antibiotic resistant bacteria, except for Campylobacter in broilers. It is concluded that the organic products investigated scored as equally well as conventional products with regard to food safety and at the same time show some promising features with respect to antibiotic resistance.",
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Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products. / Hoogenboom, L.A.P.; Bokhorst, J.G.; Northolt, M.D.; van de Vijver, L.P.L.; Broex, N.J.G.; Mevius, D.J.

In: Food Additives and Contaminants, Vol. 25, No. 10, 2008, p. 1195-1207.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products

AU - Hoogenboom, L.A.P.

AU - Bokhorst, J.G.

AU - Northolt, M.D.

AU - van de Vijver, L.P.L.

AU - Broex, N.J.G.

AU - Mevius, D.J.

PY - 2008

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AB - Organic products were analysed for the presence of contaminants, microorganisms and antibiotic resistance and compared with those from conventional products. No differences were observed in the Fusarium toxins deoxynivalenol and zearalenone in organic and conventional wheat, during both a dry period and a very wet period which promoted the production of these toxins. Nitrate levels in head lettuce produced organically in the open field were much lower than those in conventional products. In iceberg lettuce and head lettuce from the greenhouse, no differences were detected. Organically produced carrots contained higher nitrate levels than conventional products. Both organic and conventional products contained no residues of non-polar pesticides above the legal limits, although some were detected in conventional lettuce. Organic products contained no elevated levels of heavy metals. Salmonella was detected in 30% of pig faeces samples obtained from 30 organic farms, similar to the incidence at conventional farms. At farms that switched to organic production more then 6 years ago no Salmonella was detected, with the exception of one stable with young pigs recently purchased from another farm. No Salmonella was detected in faeces at the nine farms with organic broilers, and at one out of ten farms with laying hens. This is comparable with conventional farms where the incidence for Salmonella lies around 10%. Campylobacter was detected in faeces at all organic broiler farms, being much higher than at conventional farms. One of the most remarkable results was the fact that faeces from organic pigs and broilers showed a much lower incidence of antibiotic resistant bacteria, except for Campylobacter in broilers. It is concluded that the organic products investigated scored as equally well as conventional products with regard to food safety and at the same time show some promising features with respect to antibiotic resistance.

KW - solid-phase extraction

KW - bound metabolites

KW - eggs

KW - residues

KW - wheat

KW - campylobacter

KW - mycotoxins

KW - depletion

KW - quality

KW - tissues

U2 - 10.1080/02652030802014930

DO - 10.1080/02652030802014930

M3 - Article

VL - 25

SP - 1195

EP - 1207

JO - Food Additives and Contaminants

JF - Food Additives and Contaminants

SN - 0265-203X

IS - 10

ER -