Potential influence of mouldy silage on occurrence of inhibitory substances in milk | Moznost vpliva plesnive silaze na pojav zaviralnih substanc v mleku
2009
Jakovac-Strajn, B., Ljubljana Univ. (Slovenia). Veterinary Fac., Institut za higieno in patologijo prehrane | Slatnar, J. | Kirbis, A.
Feeding of spoiled or mouldy silage is frequently noticed in cattle nutrition. On the one hand, growing moulds reduce nutritional value of the silage and, on the other hand, they create conditions for the development of other secondary allergenic, toxigenic, and pathogenic microorganisms. In Europe, most frequently isolated moulds from silage are of Penicillium spp. They produce roquefortins A, B, C and D, festuclavin, PR toxin, and penitrems, which are classified among tremorgenic neurotoxins. Both, the harmful effects of these toxic metabolites on domestic animals, and their possible excretion into milk, have not been fully investigated yet. However, no literature so far quotes a connection between mouldy silage and metabolites of mould Penicillium in milk. But in theory, there subsists the possibility of their excretion into milk, consequently triggering false positive reaction to antibiotics. False positive reaction can be caused also by increased number of somatic cells and natural inhibitors in milk, still, they can be excluded with some additional tests. Most common causes of positive reaction to antibiotics in milk still remain residues due to antibiotic treatment of mastitis.
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