Abstract book 2011 - ISHAM

SCEDOSPORIUM SPP.: DETECTION, IDENTIFICATION ANDANTIFUNGAL SUSCEPTIBILITY PROFILE.Ana Alastruey-Izquierdo, Maria José Buitrago, Juan Luís Rodríguez-Tudela andManuel Cuenca-EstrellaMycology Reference Laboratory, National Centre for Microbiology, Instituto de Salud CarlosIII. Carretera de Majadahonda a Pozuelo Km. 2, 28220 Majadahonda, Madrid, Spain.INTRODUCTION: Scedosporium apiospermum is among the most common filamentousfungi colonizing the lungs of cystic fibrosis patients. Pseudallescheria boydii has beendescribed for many years as the sexual state of S. apiospermum, however the use of moleculartechniques showed that P. boydi and S. apiospermum is a complex of species. In the lastyears, several new species able to cause infections in humans have been described.OBJECTIVE: The aim of this work was to describe the prevalence of these new species in acollection of clinical samples and to asses their susceptibility profile against the antifungaldrugs available.METHODS: Fifty two clinical isolates were identified by morphological and molecularmethods. Susceptibility profile to nine antifungals was determine by EUCAST methodology.RESULTS: Twenty five strains were identified as S. apiospermum, 13 as P. boydii, six as P.ellipsoidea, five as S. aurantiacum and three as S. dehoogii. No clear differences in antifungalactivity were detected among the species of the complex. Voriconazole was the most activedrug followed by posaconazole, whereas amphotericin B and itraconazole showed a limitedactivity.CONCLUSIONS: The prevalence of new species of S. apiospermum species complex inclinical samples is low. No significant differences were found in the susceptibility profile ofthese species to the antifungal drugs.