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Effectiveness of chlorhexidine on the disinfection of complete dentures colonised with fluconazole‐resistant Candida albicans: in vitro study

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Effectiveness of chlorhexidine on the disinfection of complete dentures colonised with fluconazole‐resistant Candida albicans: in vitro study

Auteurs : Ewerton Garcia De Oliveira Mima [Brésil] ; Ana Cláudia Pavarina [Brésil] ; Fernanda Da Silveira Vargas [Brésil] ; Eunice Teresinha Giampaolo [Brésil] ; Ana Lucia Machado [Brésil] ; Carlos Eduardo Vergani [Brésil]

Source :

Mycoses [ 0933-7407 ] ; 2011-09.

RBID : ISTEX:8B9DFACA474EFEC2EAD9F15439BA079100C4A34E

English descriptors

Abstract

This in vitro study evaluated different concentrations of chlorhexidine (CHX) solution on the disinfection of dentures colonised with a reference (ATCC 90028) and azole‐resistant (R1, R2 e R3) strains of Candida albicans. Sterile dentures were individually inoculated with one of the strains and incubated at 37 °C for 24 h. Then, each denture was immersed in sterile saline (control) or CHX (2%, 1% or 0.2%) for 10 min. Samples of serial dilutions were spread on Agar Sabouraud Dextrose and incubated at 37 °C for 48 h. The colonies were counted and the values of log(cfu ml−1) were analysed by Kruskal–Wallis test (P < 0.05). Dentures immersed in CHX were incubated for 7 days. For all strains, the cfu ml−1 values of 0.2% CHX were significantly higher than those of 2% and 1% CHX. There was no difference between the cfu ml−1 values of 2% and 1% CHX. For dentures immersed in CHX, ATCC 90028 strain showed lower cfu ml−1 values than R2 and R3 strains. For control dentures, cfu ml−1 values of ATCC 90028 strain were higher than those of R strains. Immersion in 2% CHX resulted in the highest number of dentures without fungal growth after 7 days. For denture disinfection, 2% CHX was the most effective concentration, and R strains were less susceptible to disinfection. Chlorhexidine is effective in disinfection of dentures contaminated with azole‐resistant C. albicans.

Url:

https://api.istex.fr/document/8B9DFACA474EFEC2EAD9F15439BA079100C4A34E/fulltext/pdf

DOI: 10.1111/j.1439-0507.2010.01968.x

Affiliations:

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<front><div type="abstract" xml:lang="en">This in vitro study evaluated different concentrations of chlorhexidine (CHX) solution on the disinfection of dentures colonised with a reference (ATCC 90028) and azole‐resistant (R1, R2 e R3) strains of Candida albicans. Sterile dentures were individually inoculated with one of the strains and incubated at 37 °C for 24 h. Then, each denture was immersed in sterile saline (control) or CHX (2%, 1% or 0.2%) for 10 min. Samples of serial dilutions were spread on Agar Sabouraud Dextrose and incubated at 37 °C for 48 h. The colonies were counted and the values of log(cfu ml−1) were analysed by Kruskal–Wallis test (P < 0.05). Dentures immersed in CHX were incubated for 7 days. For all strains, the cfu ml−1 values of 0.2% CHX were significantly higher than those of 2% and 1% CHX. There was no difference between the cfu ml−1 values of 2% and 1% CHX. For dentures immersed in CHX, ATCC 90028 strain showed lower cfu ml−1 values than R2 and R3 strains. For control dentures, cfu ml−1 values of ATCC 90028 strain were higher than those of R strains. Immersion in 2% CHX resulted in the highest number of dentures without fungal growth after 7 days. For denture disinfection, 2% CHX was the most effective concentration, and R strains were less susceptible to disinfection. Chlorhexidine is effective in disinfection of dentures contaminated with azole‐resistant C. albicans.</div>
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Effectiveness of chlorhexidine on the disinfection of complete dentures colonised with fluconazole‐resistant Candida albicans: in vitro study

Effectiveness of chlorhexidine on the disinfection of complete dentures colonised with fluconazole‐resistant Candida albicans: in vitro study

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English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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