The body normally hosts a variety of microorganisms, including bacteria and fungi. Some of these are useful to the body. Others may multiply rapidly and form infections. Fungi can live on the dead tissues of the hair, nails, and outer skin layers.
Fungal infections include mold-like fungi (dermatophytes, causing tinea infections), and yeast-like fungi (such as Candida). Tinea infections include athlete's foot, jock itch, ringworm, and tinea capitis. Candida (yeast infections) include diaper rash, oral thrush, cutaneous candidiasis, and some cases of genital rashes.
Fungal nail infections are most often seen in adults. They often follow fungal infection of the feet. Fungal nail infections may be difficult to treat and may recur often. Toenails are affected more often than fingernails.
Individuals who frequent public swimming pools, gyms, or shower rooms; and people who perspire a great deal commonly have tinea infections because the fungi that cause them thrive in warm, moist areas. Susceptibility to fungal infection is increased by occlusive (closed in) footwear, prolonged moist skin, and minor skin or nail injuries.
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