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Occurrence of
Mycotoxins in FeedSamples from Asia
Dr.Kedar Karki
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regions within Asia-Pacific.
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from (a) Oct 2003 to Sep2005 and (b) Oct 2005 to
Sep 2006(b) Period from Oct 2005 to Sep 2006a) Period from Oct
2003 to Sep 2005
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North Asia:
Occurrence of mycotoxins in samples received from North Asiawas
6%, 55% 75% 58% and 28% for aflatoxins, zearalenone,deoxynivalenol,
fumonisin B1 and ochratoxin A respectively. T2-toxin was found in
less than 1% of the total sample population.For aflatoxin, the
highest level detected was 494 ppb in a cornsample from China. DON
was prevalent in this region (75%) andthe highest level detected
was in a DDGS sample from China with10,374 g/kg. ZON and Fum, on
the other hand, were found in55% and 58% of the samples
respectively. Highest level of ZONfound was 14,105 g/kg in a corn
gluten meal sample from China.For fumonisin B1, it was 14,714 g/kg
in a corn sample also fromChina. Ochratoxin A was detected in 28%
of the samples; 82g/kg in a soybean meal sample from China was the
maximum
level analyzed.
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The prevalence of mycotoxincontamination in South-East Asia is
in theorder as follows; fumonisin (45%),
aflatoxin (40%), zearalenone (23%),deoxynivalenol (19%) and
ochratoxin(9%).T-2 toxin was not detected in thecurrent
analysis.
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South Asia:
Although the number of samples analyzed fromthis region was
comparatively smaller (total 31),prevalence of aflatoxin (55%) was
evident.Occurrence of ZON and Fum were observed at
19% and 29% respectively. OTA though wasfound in 57% of the
samples, the levels detectedwere not high (maximum of 10 g/kg). DON
wasfound in less than 1% of the samples and T-2toxin was not
detected in any of the samples
analyzed.
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More than half of the samples analyzedwere straws/hay. The
prevalence ofmycotoxins from this region was DON
(16%), ZON (15%), Fum (8%) andaflatoxins (3%). OTA and T-2 toxin
werenot detected in these samples.
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in different commodities
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Summary:
Interestingly, from the cumulative data we haveseen, there were
certain degree of associationbetween some mycotoxins and
specificcommodity types. For instance, in corn, 81%
were found to be contaminated with Fum B1; forwheat/bran, DON
was found in 79% of thesamples; for corn gluten meal ,ZON
accountedfor more than 88% of the contamination.
