2 research outputs found
Aspergillus species identification in the clinical setting
Multiple recent studies have demonstrated the limited utility of
morphological methods used singly for species identification of clinically
relevant aspergilli. It is being increasingly recognised that comparative
sequence based methods used in conjunction with traditional phenotype based
methods can offer better resolution of species within this genus. Recognising
the growing role of molecular methods in species recognition, the recently
convened international working group meeting entitled
“Aspergillus Systematics in the Genomic Era” has proposed
several recommendations that will be useful in such endeavors. Specific
recommendations of this working group include the use of the ITS regions for
inter section level identification and the β-tubulin locus for
identification of individual species within the various Aspergillus
sections
Polyphasic taxonomy of Aspergillus section Usti
Aspergillus ustus is a very common species in foods, soil and
indoor environments. Based on chemical, molecular and morphological data,
A. insuetus is separated from A. ustus and revived. A.
insuetus differs from A. ustus in producing drimans and
ophiobolin G and H and not producing ustic acid and austocystins. The
molecular, physiological and morphological data also indicated that another
species, A. keveii sp. nov. is closely related but distinct
from A. insuetus. Aspergillus section Usti sensu
stricto includes 8 species: A. ustus, A. puniceus, A.
granulosus, A. pseudodeflectus, A. calidoustus, A. insuetus and
A. keveii together with Emericella heterothallica