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  • Casemiro, Luciana Assirati  (2)
  • Pires, Regina Helena  (2)
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  • 1
    Online Resource
    Online Resource
    Risk of Fungal Infection to Dental Patients
    Hindawi Limited ; 2017
    In:  The Scientific World Journal Vol. 2017 ( 2017), p. 1-8
    Details
    In: The Scientific World Journal, Hindawi Limited, Vol. 2017 ( 2017), p. 1-8
    Abstract: Fungi can cause various diseases, and some pathogenic fungi have been detected in the water of dental equipment. This environment offers suitable conditions for fungal biofilms to emerge, which can facilitate mycological contamination. This study verified whether the water employed in the dental units of two dental clinics at the University of Franca was contaminated with fungi. This study also evaluated the ability of the detected fungi to form biofilms. The high-revving engine contained the largest average amount of fungi, 14.93 ± 18.18 CFU/mL. The main fungal species verified in this equipment belonged to the genera Aspergillus spp., Fusarium spp., Candida spp., and Rhodotorula spp. Among the isolated filamentous fungi, only one fungus of the genus Fusarium spp. did not form biofilms. As for yeasts, all the Candida spp. isolates grew as biofilm, but none of the Rhodotorula spp. isolates demonstrated this ability. Given that professionals and patients are often exposed to water and aerosols generated by the dental procedure, the several fungal species detected herein represent a potential risk especially to immunocompromised patients undergoing dental treatment. Therefore, frequent microbiological monitoring of the water employed in dental equipment is crucial to reduce the presence of contaminants.
    Type of Medium: Online Resource
    ISSN: 2356-6140 , 1537-744X
    URL: Article
    DOI: 10.1155/2017/2982478
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2017
    detail.hit.zdb_id: 2075968-X
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  • 2
    Online Resource
    Online Resource
    Susceptibility to Oral Antiseptics and Virulence Factors Ex Vivo Associated with Candida spp. Isolated from Dental Prostheses
    Wiley ; 2019
    In:  Journal of Prosthodontics Vol. 28, No. 4 ( 2019-04), p. 398-408
    Details
    In: Journal of Prosthodontics, Wiley, Vol. 28, No. 4 ( 2019-04), p. 398-408
    Abstract: To isolate Candida spp. from dental prosthesis users’ saliva and to evaluate the isolates for the presence of several virulence factors. This research also aimed to investigate the antifungal activity of 3 commercial mouthwashes/oral antiseptic formulations containing 0.12% chlorhexidine, 0.07% cetylpyridinium, or 0.075% cetylpyridinium against planktonic and sessile (biofilm mode) yeast cells. Materials and Methods Forty‐three Candida yeasts were isolated from 32 of 70 selected patients, and the virulence factors of C. albicans , C. krusei , C. glabrata , C. tropicalis , and C. parapsilosis species were investigated by polymerase chain reaction (PCR) and proteinase in plates. Minimum inhibitory concentration (MIC), and in vitro biofilm assay evaluated the antifungal activity of antiseptics. Results C. albicans , C. krusei , C. glabrata , C. tropicalis , and C. parapsilosis were detected in mono and mixed cultures. Only C. albicans displayed genes related to adhesion and proteinases (ALS2, ALS3, SAP1, and SAP3). The aspartate proteinase activity was found in 60.46% of isolates. The tested antiseptic formulations exhibited a MIC less than 1.25% toward yeasts in the planktonic mode. According to XTT ((2,3‐bis(2‐methoxy‐4‐nitro‐5‐sulfophenyl)‐2H‐tetrazolium‐5‐carboxanilide) assay results, most Candida isolates and all mixed cultures formed biofilms within 24 hours. The evaluated antiseptic formulations were also active against biofilms. Conclusion Most virulence factors investigated here (ALS2, ALS3, SAP1, and SAP3) occurred in the majority of the Candida spp. isolates, especially in C. albicans . The tested mouthwash formulations were effective against all the yeast isolates in both the planktonic and sessile growth modes. Developing alternative therapies that can avoid or control biofilm formation is necessary to prevent oral candidiasis and other Candida spp. infections.
    Type of Medium: Online Resource
    ISSN: 1059-941X , 1532-849X
    URL: Issue
    URL: Article
    DOI: 10.1111/jopr.2019.28.issue-4
    DOI: 10.1111/jopr.13037
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2053077-8
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