Phylogeny of the clinically relevant species of the emerging fungus trichoderma and their antifungal susceptibilities

Identifier:  imarina:5127838

Handle: https://hdl.handle.net/20.500.11797/imarina5127838

Authors:  Sandoval-Denis, Marcelo; Sutton, Deanna A; Cano-Lira, Jose F; Gene, Josepa; Fothergill, Annette W; Wiederhold, Nathan P; Guarro, Josep

Abstract:
A set of 73 isolates of the emerging fungus Trichoderma isolated from human and animal clinical specimens were characterized morphologically and molecularly using a multilocus sequence analysis that included the internal transcribed spacer (ITS) regions of the nuclear ribosomal DNA and fragments of the translation elongation factor 1 alpha (Tef1), endochitinase CHI18-5 (Chi18-5), and actin 1 (Act1) genes. The most frequent species was Trichoderma longibrachiatum (26%), followed by Trichoderma citrinoviride (18%), the Hypocrea lixii/Trichoderma harzianum species complex (15%), the newly described species Trichoderma bissettii (12%), and Trichoderma orientale (11%). The most common anatomical sites of isolation in human clinical specimens were the respiratory tract (40%), followed by deep tissue (30%) and superficial tissues (26%), while all the animal-associated isolates were obtained from superficial tissue samples. Susceptibilities of the isolates to eight antifungal drugs in vitro showed mostly high MICs, except for voriconazole and the echinocandins