Abstract：
:To date, no single reported DNA extraction method is suitable for the efficient extraction of DNA from all fungal species. The efficiency of extraction is of particular importance in PCR-based medical diagnostic applications where the quantity of fungus in a tissue biopsy may be limited. We subjected 16 medically relevant fungi to physical, chemical and enzymatic cell wall disruption methods which constitutes the first step in extracting DNA. Examination by light microscopy showed that grinding with mortar and pestle was the most efficient means of disrupting the rigid fungal cell walls of hyphae and conidia. We then trialled several published DNA isolation protocols to ascertain the most efficient method of extraction. Optimal extraction was achieved by incorporating a lyticase and proteinase K enzymatic digestion step and adapting a DNA extraction procedure from a commercial kit (MO BIO) to generate high yields of high quality DNA from all 16 species. DNA quality was confirmed by the successful PCR amplification of the conserved region of the fungal 18S small-subunit rRNA multicopy gene.
journal_name
J Microbiol Methodsjournal_title
Journal of microbiological methodsauthors
Karakousis A,Tan L,Ellis D,Alexiou H,Wormald PJdoi
10.1016/j.mimet.2005.06.008subject
Has Abstractpub_date
2006-04-01 00:00:00pages
38-48issue
1eissn
0167-7012issn
1872-8359pii
S0167-7012(05)00183-1journal_volume
65pub_type
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