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Oral Candida in HIV infection and AIDS: new perspectives/new approaches
D C Coleman1, D E Bennett, D J Sullivan
1University of Dublin, Moyne Institute, Department of Microbiology, Republic of Ireland.
Abstract:
Oral candidosis has become an increasingly important problem in HIV-infected individuals. At present, the small body of published literature on the characterization of the Candida strains and species found in HIV+ patients is full of confusion and contradictions. Some of these difficulties are the result of the methodological shortcomings of a number of the techniques that have been used. Examples of the problems that may be encountered on primary isolation and subculture are described and the drawbacks associated with the systems used to date for phenotyping Candida are quoted. While molecular characterization techniques would appear to offer a reliable and objective alternative, they too have their strengths and weaknesses. An attempt is made to summarize the progress that has been made recently in the detection and identification of Candida albicans and also the non-albicans species from HIV-infected individuals. What emerges is that the commensal Candida species that inhabit the oral cavities of HIV+ patients are subjected to a number of significant pressures that probably promote the selection of organisms with unusual phenotypes and genotypes. These Candida are more difficult to characterize and behave differently compared to their counterparts in HIV- individuals. It is clear that uncovering the factors that are important for the selection of treatment regimens and will be predictive of outcome will not be easy. Candida organisms are neither as benign nor as simple as once thought.
Insights
Oral candidosis is a growing concern for individuals with HIV/AIDS. Characterizing Candida strains in these patients presents challenges due to methodological issues and unique fungal adaptations, complicating treatment strategies.
Area of Science:
- Medical Mycology
- Infectious Diseases
- HIV/AIDS Research
Background:
- Oral candidosis is a significant opportunistic infection in individuals with human immunodeficiency virus (HIV).
- Existing literature on Candida characterization in HIV-positive patients is inconsistent, often due to methodological limitations.
- Understanding Candida species and their behavior in HIV-infected individuals is crucial for effective management.
Purpose of the Study:
- To review and summarize recent advancements in the detection and identification of Candida species in HIV-infected individuals.
- To highlight the challenges and complexities in characterizing Candida strains from oral cavities of HIV-positive patients.
- To discuss the factors influencing the selection and behavior of Candida in the oral environment of HIV-infected individuals.
Main Methods:
- Review of published literature on Candida characterization techniques in HIV-infected individuals.
- Analysis of methodological shortcomings in traditional phenotyping and molecular identification methods.
- Discussion of phenotypic and genotypic variations observed in Candida strains from HIV-positive patients.
Main Results:
- Methodological inconsistencies in Candida strain characterization contribute to confusion in current literature.
- Both traditional and molecular identification methods have limitations for Candida species.
- Candida strains in HIV-positive individuals exhibit unique phenotypes and genotypes due to host-specific pressures, making them harder to characterize and manage.
- Non-albicans Candida species are increasingly recognized in this population.
Conclusions:
- Accurate characterization of oral Candida in HIV-infected individuals is complex and requires refined methodologies.
- The unique adaptations of Candida in HIV-positive patients necessitate tailored treatment approaches.
- Further research is needed to identify predictive factors for treatment outcomes in oral candidosis among HIV-infected individuals.