SciELO - Scientific Electronic Library Online

vol.45 issue2Dissemination of blaIMP-8 among Enterobacteriaceae isolates from a Buenos Aires HospitalDifferential effects of two strains of Rhizophagus intraradices on dry biomass and essential oil yield and composition in Calamintha nepeta author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




  • Have no cited articlesCited by SciELO

Related links


Revista argentina de microbiología

Print version ISSN 0325-7541


CASTRILLO, María L; HORIANSKI, Marta A  and  JERKE, Gladis. Isolation of Aspergillus section Nigri strains in yerba mate in Posadas (Misiones, Argentina) and evaluation of their ochratoxigenic potential. Rev. argent. microbiol. [online]. 2013, vol.45, n.2, pp.110-113. ISSN 0325-7541.

The objectives of the present work were to investigate the isolation frequency of genus Aspergillus in canchada yerba mate (YMCH) and elaborated yerba mate (YME) (Ilex paraguariensis) and the proportion of section Nigri isolates, as well as to determine ochratoxin A production by Aspergillus species section Nigri. Three hundred twenty eight Aspergillus strains from 20 samples of YMCH and 1306 Aspergillus strains from 36 samples of YME were isolated; of the total, 279 from the first group of strains and 1215 from the latter group, belonged to section Nigri. For the detection of ochratoxin A production, the strains were cultivated on Czapeck yeast extract agar and the toxin was detected by thin layer chromatography under UV light. Uniserate species predominance was observed in the 1494 strains of Aspergillus section Nigri obtained (Aspergillus japonicus var. japonicus and Aspergillus japonicus var. aculeatus), whereas none of the strains analysed showed ochratoxin A production in vitro at the detection level of the methodology employed.

Keywords : Isolation frequency; Aspergillus; Ochratoxin A; Ilex paraguariensis.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License