Final answer:
Onychomycosis can be defined as a fungal nail infection. It is caused by dermatophytes or Candida spp. The infection causes the nail to become yellow, brittle, and prone to breaking.
Step-by-step explanation:
Onychomycosis can be defined as a fungal nail infection. It is caused by dermatophytes or Candida spp. The infection causes the nail to become yellow, brittle, and prone to breaking. Onychomycosis is a relatively common condition among adults. It can be treated with over-the-counter topical creams and powders, but more persistent cases may require prescription oral medications.