1 the proven link between heart diseases and lung cancer to active smoking, 2  the presence of several known carcinogens in environmental tobacco smoke, and. 3  the general acceptance that the risks of certain diseases are directly related to the amount of tobacco smoke inhaled.
Onychomycosis (also known as dermatophytic onychomycosis or tinea unguium) is a fungal infection of the nail. It is the most common disease of the nails and constitutes about half of all nail abnormalities.
Tinea unguium, a dermatophyte infection of the nail, is a subset of onychomycosis, which also may be caused by yeast and non-dermatophyte molds. 19 Risk factors for this infection include aging, diabetes, poorly fitting shoes, and the presence of tinea pedis.ransmission of dermatophytes also can occur indirectly from fomites (e.g., upholstery, hairbrushes, hats). Anthropophilic organisms are responsible for most fungal skin infections. Transmission can occur by direct contact or from exposure to desquamated cells.