Even seasoned workers find it tedious and sometimes frustrating to remove Hülle cells and stray conidia from Aspergillus cleistothecia by rolling them with forceps across an agar surface, particularly when large numbers must be cleaned. It can be even more challenging to teach the skill to others, especially to a whole class of easily discouraged undergraduates, who may be seeing their first high-mag image of forceps tips at the same time as their first view of a cleistothecium.
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Hill, T. W.,
"Efficient high-volume cleaning of Aspergillus nidulans cleistothecia using bare fingers.,"
Fungal Genetics Reports:
Vol. 50, Article 2.