dc.contributor.author
Reich, Kerstin
dc.date.accessioned
2018-06-07T22:47:16Z
dc.date.available
2000-12-14T00:00:00.649Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/9642
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-13840
dc.description
Die komplette Dissertation im pdf-Format:
diss.pdf
dc.description.abstract
During a period of one and a half year, 384 feed samples and 330 serum samples
were analysed for ochratoxin A. In the same time, 391 feed samples and 234
serum samples were analysed for zearalenone.
On average, 17,7 % (n=68) of the feed samples and 55,2 % (n=182) of the serum
samples were ochratoxin A positiv.
Zearalenone was found in 74,4 % (n=291) of the feed samples and in 6,0 %
(n=14) of the serum samples.
Those results showed that an individual determination of the recovery rate for
each feed sample is very important for the real value.
If ochratoxin A was traced in the feed, it can also be found in the sera of
pigs fed with this feed. Due to the different detectibility limits with 0,1
ppb in sera and 1 ppb in feed, even smallest amounts can be analysed in the
blood serum.
If zearalenone intoxication is suspected, the feedstuff analysis is to prefer
because the half time period of zearalenone in blood is very short.
In this study different influences on the intoxication levels could be shown:
1. Seasonality: The frequency of intoxication increases with the time of feed storage. Because of the varing climatic circumstances, the values differ from year to year.
2. Farm type: More frequently, the serum samples of fattening herds were more often ochratoxin A positiv than the samples of sow herds. Zearalenone was found more frequently in feed of fattening herds than in sow herds.
3. Storing type: Compared to indoor silo or storage on the floor, the ochratoxin A contamination of the feed in outdoor silos was lower.
The highest ochratoxin A-contamination rate was found by storage in sacks or
on the floor.
The highest zearalenone contamination rate was found in feed stored in outdoor
silo.
4. Feedstuff derivation: In comparison to pigs which got home mixed feed, pigs supplied with purchased feed showed serologically more ochratoxin A positiv results.
There was no different in the zearalenone contamination of purchased feed and
home mixed feed.
5. Straw bedding: The analysis of straw often showed high values of both mycotoxins. Therefore, an analysis of the straw seams to be necessary if an intoxication with mycotoxins is suspected.
This study demonstrates that samples accidentially taken for the field study
are more frequently ochratoxin A contaminated than toxin-suspected samples.
It showed further more, that in toxin-suspected feed samples zearalenone was
more frequently detected than in the samples of the field study.
The results demonstrate, that the clinical diagnosis of an ochratoxin A
intoxication is more difficult than the diagnosis of the zearalenone syndrome.
en
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject.ddc
600 Technik, Medizin, angewandte Wissenschaften::630 Landwirtschaft::630 Landwirtschaft und verwandte Bereiche
dc.title
Feldstudie zum Vorkommen von Ochratoxin A und Zearaleon in Futtermitteln und
im Blut von Zucht- und Mastschweinen mit besonderer Berücksichtigung der
Futterherkunft und -lagerung
dc.contributor.firstReferee
Univ.-Prof. Dr. G. v. Mickwitz
dc.contributor.furtherReferee
Univ.-Prof. Dr. W. Müller
dc.date.accepted
1998-07-03
dc.date.embargoEnd
2001-02-05
dc.identifier.urn
urn:nbn:de:kobv:188-1998000786
dc.title.translated
A field study to the occurence of ochratoxin A and zearalenone in feedstuff
and in blood of breeding and fattening pigs with considerations of the origin
and storing of the feed
en
refubium.affiliation
Veterinärmedizin
de
refubium.mycore.fudocsId
FUDISS_thesis_000000000045
refubium.mycore.transfer
http://www.diss.fu-berlin.de/1998/78/
refubium.mycore.derivateId
FUDISS_derivate_000000000045
dcterms.accessRights.dnb
free
dcterms.accessRights.openaire
open access