FLAGSTAFF, Ariz. - Cryptococcus gattii, a virulent fungus that has invaded the Pacific Northwest is highly adaptive and warrants global "public health vigilance," according to a study by an international team led by the Translational Genomics Research Institute (TGen).
C. gattii, which likely originated in Brazil, is responsible for dozens of deaths in recent years since it was first found in 1999 on Vancouver Island, British Columbia, Canada, well outside its usual tropical habitats.
"We identified several genes that may make the outbreak strains more capable of surviving colder environments and that make it more harmful in the lungs," said David Engelthaler, Director of Programs and Operations for TGen's Pathogen Genomics Division (TGen North) and lead author of the study published today in the scientific journal mBio.
This study should form the basis of additional investigations about how and why C. gattii disperses and emerges. It identified several new genomic targets for diagnostic tests, and possible new targets for therapeutic drugs and preventative vaccines.
"By closely analyzing the genomes of dozens of outbreak strains, as well as globally diverse strains, we were able to closely compare and determine the genomic differences that may cause their clinical and ecological changes," said Dr. Paul Keim, one of the study's senior authors. Dr. Keim also is Director of TGen North, and Director of the Microbial Genetics and Genomics Center at Northern Arizona University (NAU).
TGen, working with the U.S. Centers for Disease Control and Prevention and others, conducted one of the largest global fungal genome analyses of a specific species to understand its emergence in new environments. The collaborative team included 24 researchers from 13 institutions in seven nations who sequenced 115 genomes of C. gattii collected from 15 countries.
"By thinking globally, we were
|Contact: Steve Yozwiak|
The Translational Genomics Research Institute