Comparative Pathogenicity of United Kingdom Isolates of the Emerging Pathogen Candida auris and Other Key Pathogenic Candida Species
The incidence of invasive candidiasis, which includes candidemia and deep tissue infections, continues to rise and is associated with considerable mortality rates. Candida albicans remains the most common cause of invasive candidiasis, although the prevalence of non- albicans species has increased o...
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| Vydáno v: | mSphere Ročník 1; číslo 4 |
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| Hlavní autoři: | , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
United States
American Society for Microbiology
01.07.2016
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| Témata: | |
| ISSN: | 2379-5042, 2379-5042 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | The incidence of invasive candidiasis, which includes candidemia and deep tissue infections, continues to rise and is associated with considerable mortality rates.
Candida albicans
remains the most common cause of invasive candidiasis, although the prevalence of non-
albicans
species has increased over recent years. Since its first description in 2009,
Candida auris
has emerged as a serious nosocomial health risk, with widespread outbreaks in numerous hospitals worldwide. However, despite receiving considerable attention, little is known concerning the pathogenicity of this emerging fungal pathogen. Here, using the
Galleria mellonella
insect systemic infection model, we show strain-specific differences in the virulence of
C. auris
, with the most virulent isolates exhibiting pathogenicity comparable to that of
C. albicans
, which is currently accepted as the most pathogenic member of the genus.
Candida auris
, first described in 2009, has since emerged as an important, multidrug-resistant, nosocomial agent of candidemia, with large outbreaks reported worldwide and high mortality rates associated with therapeutic failure. The current study employed
C. auris
isolates from a variety of centers in the United Kingdom to evaluate the pathogenicity of this emerging pathogen compared to that of other common pathogenic yeast species in the invertebrate
Galleria mellonella
infection model. We showed that
C. auris
isolates differ in their growth characteristics
in vitro
, with a proportion of isolates failing to release daughter cells after budding, resulting in the formation of large aggregates of cells that cannot be physically disrupted. Our results also demonstrate strain-specific differences in the behavior of
C. auris
in
G. mellonella
, with the aggregate-forming isolates exhibiting significantly less pathogenicity than their nonaggregating counterparts. Importantly, the nonaggregating isolates exhibited pathogenicity comparable to that of
C. albicans
, which is currently accepted as the most pathogenic member of the genus, despite the fact that
C. auris
isolates do not produce hyphae and produce only rudimentary pseudohyphae either
in vitro
or in
G. mellonella
.
IMPORTANCE
The incidence of invasive candidiasis, which includes candidemia and deep tissue infections, continues to rise and is associated with considerable mortality rates.
Candida albicans
remains the most common cause of invasive candidiasis, although the prevalence of non-
albicans
species has increased over recent years. Since its first description in 2009,
Candida auris
has emerged as a serious nosocomial health risk, with widespread outbreaks in numerous hospitals worldwide. However, despite receiving considerable attention, little is known concerning the pathogenicity of this emerging fungal pathogen. Here, using the
Galleria mellonella
insect systemic infection model, we show strain-specific differences in the virulence of
C. auris
, with the most virulent isolates exhibiting pathogenicity comparable to that of
C. albicans
, which is currently accepted as the most pathogenic member of the genus. |
|---|---|
| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 Citation Borman AM, Szekely A, Johnson EM. 2016. Comparative pathogenicity of United Kingdom isolates of the emerging pathogen Candida auris and other key pathogenic Candida species. mSphere 1(4):e00189-16. doi:10.1128/mSphere.00189-16. |
| ISSN: | 2379-5042 2379-5042 |
| DOI: | 10.1128/mSphere.00189-16 |