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PubMed1975

[Toxinogenic moulds in silage. V. - Production of byssochlamic acid in liquid medium with by Byssochlamys nivea Westling, Byssochlamys fulva Olliver and Smith and Paecilomyces varioti Bainier isolated in forages (author's transl)].

The toxinogenesis of 10 strains of Byssochlamys nivea, 4 of Byssochlamys fulva and 8 of Paecilomyces varioti is studied in Czapek's enriched liquid medium (8 p. 1000 glucose + 2p. 1000 yeast extract) at 26 degrees C. 60 p. 100 of Byssochlamys nivea filtrates, 100 p. 100 of Byssochlamys fulva filtrates and 37 p. 100 of Paecilomyces varioti filtrates contain byssochlamic acid after 60 days of culture at 26 degrees C. The concentrations observed vary from 40 to 540 p.p.m. In these moulds, patuline-production ability has also been tested (Escoula, 1975 c). There seems to be no relation between the production of patuline and of byssochlamic acid in these three species.

Animal Feed↗
PubMed2003

Accumulation of mycotoxins in forage of winter pasture during prolonged utilisation of sward.

The concentration of mycotoxins in sward depending on time of pre-utilisation in summer and date of harvest in winter was analysed during the 2000-2002 vegetation seasons. Additionally, the yield of pasture sward was estimated. Higher concentrations of ochratoxin A--respectively: 0.55 and 050 ng/g DM--were found in the pasture sward harvested in December and January when compared to the sward collected in November (0.36 ng/g DM). The average concentration of zearalenone varied from 2.74 ng/g DM in December, to 6.00 ng/g DM in November and 9.77 ng/g DM in January. The highest concentration of ochratoxin A was 1.82 ng/g DM and zearalenone 47.89 ng/g DM. The highest number of samples in which ochratoxin A exceeded the level of 0.3 ng/g DM was noted in sward harvested in January (61.1%), while in the case of zearalenone, the number of samples containing this mycotoxin at a level exceeding 3.0 ng/g DM varied from 55.6% in December to 66.7% in November and January. It seems that the percentage of ochratoxin A positive samples and the toxin concentration level in the sward of winter pastures increased during the time of sward regrowth.

Animal Feed↗