Resumo

DUCE, Jorge A; BORDENAVE, Sylvia A  e  YBARRA, Liliana, R. Analysis for the presence of Bacillus cereus in manufactured Yerba Mate. Rev. cienc. tecnol. [online]. 2012, n.17. ISSN 1851-7587.

In this work, the presence of Bacillus cereus in manufactured yerba mate was investigated. The natural habitat of this microorganism is the soil: it was isolated from different plant species, but above all, from boiled rice. Bacillus cereus produces toxins of two kinds preformed in food, one thermo-resistant or emetic and another thermolabile or diarrheogenic. Thirty two samples of manufactured yerba mate of different trademarks were analyzed, out of which 18 presented positive results, 6 of which were confirmed by means of biochemical tests. The bacteria isolated were delivered to the Instituto INEI-ANLIS Dr. Carlos Malbrán for their typification and eventual confirmation. The presence of Bacillus cereus in food constitutes a serious risk, above all due to its capacity to produce thermoresistant toxins. In the literature, reference to its isolation in dried vegetables was found, a reason for which its presence in yerba mate is feasible.

Palavras-chave : Pathogens; Bacillus cereus; Yerba mate; Presence.

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