Despite the common names ringworm and dermatophyte, the disease is caused by a fungus, not a worm or plant. Trichophyton, Microsporum, and Epidermophyton are the most common genera that cause ringworm in humans. These organisms feed on keratin, the major structural component of hair, skin and nails.
Thuja occidentalis 'Nigra'. Naturally broad, pyramidal evergreen shrub displays deep green, scalelike needles arranged in flat sprays. New light green needles emerge in spring, deepening in color as they mature. Deep green color adds contrast to winter landscape.
Other Viagra side effects include reports of sudden hearing loss and nonarteritic ischemic optic neuropathy (NAION), a type of eye disorder that may lead to permanent vision loss. Viagra has also long been associated with short-term color changes in vision that cause objects to appear green or blue.