Oral Ulceration - CANDIDIASIS
Candidiasis is the most common
type of fungal infection involving the oral mucous membranes. The causative
organism, Candida albicans, is a common normal inhabitant of the mouth
and is nonpathogenic under normal conditions. Oral candidiasis usually occurs
only when there has been a reduction in the competitive oral microflora, as
seen following long-term broad-spectrum antibiotic therapy, or when there
is a decrease in the resistance of the host tissue to infection.
When there
is a decrease in the host resistance to infection, some predisposing factor
is usually present and should be sought out. Possibilities include infancy,
pregnancy, decreased salivary flow, denture, poorly controlled diabetes, hypoparathyroidism,
hypoadrenocorticism, malnutrition, immunosuppression including AIDS, underlying
malignancy, and lymphoreticular disorders such as agranulocytosis, leukemia,
lymphoma, etc.
Oral candidiasis usually presents
with profuse creamy white plaques, which cover any portion of the mouth, rub
off easily, leaving a bright red, raw, bleeding surface. In some cases it
may present as a brightly erythematous mucosa with only scattered white plaques.
Chronic hyperplastic cadidiasis is the form of the disease that presents clinically
as a leukoplakic lesion that does not rub off the underlying mucosa. A biopsy
is necessary to differentiate this form of candidiasis from other forms of
leukoplakia. Although the diagnosis may be made primarily on the clinical
features alone, cytologic smears are helpful in confirming it. This may easily
be done by making a smear of the suspected lesion on a glass slide, adding
a drop of 20% potassium hydroxide, and examining the slide for the typical
hyphae. Oral Candida infection is usually treated with various topical antifungal
preparations. The use of systemic antifungal therapy such as Fluconazole
or Itraconazole may be initiated under specialist supervision.
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