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J Med Microbiol 55 (2006), 31-35; DOI: 10.1099/jmm.0.46292-0
© 2006 Society for General Microbiology
ISSN 0022-2615

Intraspecific mitochondrial DNA polymorphism within the emerging filamentous fungal pathogen Trichoderma longibrachiatum

Zsuzsanna Antal1, János Varga2, László Kredics1, András Szekeres2, Lóránt Hatvani2, László Manczinger2, Csaba Vágvölgyi2 and Elisabeth Nagy1,3

1 Microbiological Research Group, Hungarian Academy of Sciences and University of Szeged, PO Box 533, H-6701 Szeged, Hungary

2 ,3 Department of Microbiology, Faculty of Sciences2 , and Department of Clinical Microbiology, Faculty of Medicine3 , University of Szeged, Szeged, Hungary

Correspondence
Zsuzsanna Antal
zs.antal{at}bio.u-szeged.hu

Received 12 August 2005
Accepted 9 September 2005

The genetic diversity of the emerging fungal pathogen Trichoderma longibrachiatum was examined at the level of mitochondrial DNA. The 17 investigated strains, comprising nine clinical and eight non-clinical isolates, exhibited seven and ten different mitochondrial DNA profiles by using the restriction enzymes BsuRI and Hin6I, respectively. The sizes of mitochondrial DNAs varied from 34·9 to 39·5 kb. The discriminatory power of the method was higher than that of internal transcribed spacer sequence analysis and therefore should be more suitable for identification and epidemiological investigations. However, clinical and non-clinical isolates did not form separate clusters on the resulting dendrogram and thus there was no indication of a correlation between genetic structure and pathogenicity of the isolates.

Abbreviations: ITS, internal transcribed spacer; RAPD, random amplification of polymorphic DNA.




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I. S. Druzhinina, M. Komon-Zelazowska, L. Kredics, L. Hatvani, Z. Antal, T. Belayneh, and C. P. Kubicek
Alternative reproductive strategies of Hypocrea orientalis and genetically close but clonal Trichoderma longibrachiatum, both capable of causing invasive mycoses of humans
Microbiology, November 1, 2008; 154(11): 3447 - 3459.
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