Fusarium and Aspergillus mycotoxins contaminating wheat silage for dairy cattle feeding in Uruguay
| Autor: | Lina Bettucci, Dinorah Pan, Agustina del Palacio |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
0301 basic medicine
Fusarium Aflatoxin Mycobiota Animal feed Silage 030106 microbiology lcsh:QR1-502 Food Contamination Forage Microbiology lcsh:Microbiology 03 medical and health sciences chemistry.chemical_compound Animals Mycotoxin Triticum Aspergillus Wheat silage biology Microbiota Fungi Mycotoxins biology.organism_classification Animal Feed 030104 developmental biology Agronomy chemistry Food Microbiology Uruguay Cattle |
| Zdroj: | Brazilian Journal of Microbiology, Volume: 47, Issue: 4, Pages: 1000-1005, Published: DEC 2016 Brazilian Journal of Microbiology, Vol 47, Iss 4, Pp 1000-1005 Brazilian Journal of Microbiology v.47 n.4 2016 Brazilian Journal of Microbiology Sociedade Brasileira de Microbiologia (SBM) instacron:SBM |
| ISSN: | 1517-8382 |
| DOI: | 10.1016/j.bjm.2016.06.004 |
| Popis: | Wheat is one of the most important cultivated cereals in Uruguay for human consumption; however, when harvest yields are low, wheat is usually used in ensiling for animal feeding. Ensiling is a forage preservation method that allows for storage during extended periods of time while maintaining nutritional values comparable to fresh pastures. Silage is vulnerable to contamination by spoilage molds and mycotoxins because ensilage materials are excellent substrates for fungal growth. The aim of the study was to identify the mycobiota composition and occurrence of aflatoxins and DON from wheat silage. A total of 220 samples of wheat were collected from four farms in the southwest region of Uruguay were silage practices are developed. The main fungi isolated were Fusarium (43%) and Aspergillus (36%), with Fusarium graminearum sensu lato and Aspergillus section Flavi being the most prevalent species. Aflatoxin concentrations in silo bags ranged from 6.1 to 23.3 µg/kg, whereas DON levels ranged between 3000 µg/kg and 12,400 µg/kg. When evaluating aflatoxigenic capacity, 27.5% of Aspergillus section Flavi strains produced AFB1, 5% AFB2, 10% AFG1 and 17.5% AFG2. All isolates of F. graminearum sensu lato produced DON and 15-AcDON. The results from this study contribute to the knowledge of mycobiota and mycotoxins present in wheat silage. |
| Databáze: | OpenAIRE |
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