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.
Pathophysiology. Pellagra is the late stage of severe niacin deficiency. Niacin, or vitamin B-3, is a water-soluble vitamin. In 1926, Goldberger reported that nicotinamide was a preventive factor of pellagra.Pellagra can be divided into primary and secondary forms.ackground. Pellagra is clinically manifested by the 4 D' s: photosensitive dermatitis, diarrhea, dementia, and death. The full tetrad of symptoms is usually not well developed in infants and children. This vitamin deficiency responds to treatment with nicotinic acid.