Abstract
Infections caused by emerging fungal pathogens represent a new threat to human health. The yeast Yarrowia (Candida) galli was first described from chicken breast and liver in 2004 and has occasionally been isolated in clinical settings. In this study, we present the first report of a Y. galli isolate from a face granuloma of a woman. Y. galli is unable to grow at human physiological temperature (37 °C). Phenotypic analysis demonstrates that Y. galli can exist as several morphological types, namely fluffy, sticky, tight, and yeast forms, based on their cellular and colony appearances. Interestingly, Y. galli is able to undergo switching among different morphologies. These morphological changes are similar to the switching systems in pathogenic Candida species such as Candida albicans and Candida tropicalis. We further sequenced the genome of the Y. galli isolate. A comparative analysis with pathogenic yeast species indicated that a set of lipid metabolism genes were enriched in Y. galli. Domain enrichment analysis demonstrated that, similar to Candida clade species, the genome of Y. galli maintained several gene families required for virulence. Our biological and genomic analyses provide new insights into the understanding of the biology of Y. galli as either an environmental isolate or a potential human pathogen.
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Acknowledgements
This work was supported by National Science and Technology Major Project (http://program.most.gov.cn/, grant number 2018ZX10101004-003-002) and the National Natural Science Foundation of China (31930005 and 31625002 to GH).
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Bing, J., You, Z., Zheng, Q. et al. Biological and genomic analyses of a clinical isolate of Yarrowia galli from China. Curr Genet 66, 549–559 (2020). https://doi.org/10.1007/s00294-019-01046-x
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DOI: https://doi.org/10.1007/s00294-019-01046-x