Isolation of Cryptococcus albidus on eucalyptus trees
DOI:
https://doi.org/10.33885/sf.2007.3.998Keywords:
Cryptococcosis, ecology, EucalyptusAbstract
Some Cryptococcus yeast species have established diverse ecological associations
with plants. Cryptococcus neoformans, C. gattii, C. laurentii, C. albidus, and C. uniguttulatus
are etiological agents of cryptococcosis, a severe mycotic infection, and of allergies in
humans. The study of the natural habitat of Cryptococcus spp. is of medical relevance,
because the habitat of these yeasts could represent a source of infection for these diseases. In
this study, the presence of Cryptococcus spp. was investigated in Eucalyptus spp. trees in the
National University campus, Mexico City. A total of 923 samples of leaves, flowers, and buds
obtained from 135 trees during one year in four different occasions were processed in niger
agar medium. The isolated fungal colonies were identified by morphological and
biochemical methods. The 4179 fungal colonies obtained were identified, in order of
frequency, as: Saccharomyces spp., Candida spp., Aureobasidium spp., Epicoccum spp.,
Exophiala spp., Trichosporon spp., Penicillium spp., Alternaria spp., and Aspergillus spp. The
only Cryptococcus species isolated corresponded to C. albidus in seven samples.
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