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The nail under fungal siege in patients with type II diabetes mellitus
Gérald E Piérard1, Claudine Piérard-Franchimont
1Department of Dermatopathology, University Hospital of Liège, Liège, Belgium. gerald.pierard@ulg.ac.be
Abstract:
Few studies have examined the prevalence of onychomycosis among diabetic patients. Given the morbidity linked to onychomycosis, and the ever-growing size of the diabetic population, a better recognition of this nail infection is welcome. To revisit the relative prevalence of dermatophyte, yeast and non-dermatophytic mould onychomycoses in diabetic adults in a prospective study using combined histomycology and cultures. Toenail clippings were collected for 3 years in 190 type II diabetic patients (136 men and 54 women) and from an age- and gender-matched group of non-diabetic subjects. All sampled nails showed clinical alterations reminiscent of onychomycosis. Histomycology and cultures were performed on each sample to distinguish onychomycosis from non-infectious onychodystrophy. Compared to non-diabetic subjects with nail alterations, diabetics showed a higher proportion of onychomycosis relative to non-fungal onychodystrophy. Diabetic men suffered more frequently from onychomycosis and onychodystrophy than diabetic women. When considering the nature of the fungal pathogens, dermatophytes predominated largely over yeast and non-dermatophytic moulds, both in diabetic and non-diabetic patients. Diabetic patients, particularly men, are at increased risk of developing onychomycosis. The morbidity linked to this disorder, and its impact on the foot status in diabetic subjects merit to be better appreciated by clinicians.
Insights
Diabetic patients, especially men, have a higher risk of developing onychomycosis, a fungal nail infection. This study highlights the increased prevalence of this condition in diabetics compared to non-diabetics.
Area of Science:
- Dermatology
- Mycology
- Diabetology
Background:
- Onychomycosis is a common nail infection with significant morbidity.
- The prevalence of onychomycosis in diabetic populations requires further investigation.
- Diabetic patients face an increasing burden of fungal infections.
Purpose of the Study:
- To determine the prevalence of dermatophyte, yeast, and non-dermatophytic mould onychomycoses in diabetic adults.
- To compare the prevalence of onychomycosis in diabetic versus non-diabetic individuals.
- To analyze the impact of diabetes on nail pathologies.
Main Methods:
- Prospective study involving 190 type II diabetic patients and a matched control group.
- Collection of toenail clippings over three years.
- Combined histomycology and cultures to differentiate onychomycosis from onychodystrophy.
Main Results:
- Diabetic patients exhibited a higher proportion of onychomycosis compared to non-fungal onychodystrophy.
- Diabetic men were more frequently affected by onychomycosis and onychodystrophy than women.
- Dermatophytes were the predominant fungal pathogens in both groups.
Conclusions:
- Diabetic individuals, particularly men, are at an elevated risk for onychomycosis.
- The clinical significance of onychomycosis in diabetic foot care warrants greater clinician attention.
- Early recognition and management of onychomycosis are crucial for diabetic patients.
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