Molecular phylogeny and proposal of two new species of the emerging pathogenic fungus Saksenaea.

Abstract:

:Saksenaea is a monotypic genus belonging to the order Mucorales and capable of producing severe human infections. Through a polyphasic study based on analysis of the sequences of the internal transcribed spacer (ITS) region, domains D1 and D2 of the 28S rRNA gene, and the elongation factor 1α (EF-1α) gene, as well as by evaluation of relevant morphological and physiological characteristics of a set of clinical and environmental strains, we have demonstrated that Saksenaea vasiformis is a complex of species. We propose as new species Saksenaea oblongispora, characterized by oblong sporangiospores and unable to grow at 42°C, and Saksenaea erythrospora, characterized by large sporangiophores and sporangia and by ellipsoid sporangiospores, biconcave in the lateral view. Itraconazole, posaconazole, and terbinafine were active against all isolates included in the study, while amphotericin B, voriconazole, and the echinocandins showed low activity.

journal_name

J Clin Microbiol

authors

Alvarez E,Garcia-Hermoso D,Sutton DA,Cano JF,Stchigel AM,Hoinard D,Fothergill AW,Rinaldi MG,Dromer F,Guarro J

doi

10.1128/JCM.01646-10

subject

Has Abstract

pub_date

2010-12-01 00:00:00

pages

4410-6

issue

12

eissn

0095-1137

issn

1098-660X

pii

JCM.01646-10

journal_volume

48

pub_type

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