Psoriasis is a long-lasting autoimmune disease characterized by patches of abnormal skin. These skin patches are typically red, dry, itchy, and scaly. On people with darker skin the patches may be purple in colour. Psoriasis varies in severity from small, localized patches to complete body coverage. Injury to the skin can trigger psoriatic skin changes at that spot, which is known as the Koebner phenomenon.
There are five main types of psoriasis: plaque, guttate, inverse, pustular, and erythrodermic. Plaque psoriasis, also known as psoriasis vulgaris, makes up about 90 percent of cases. It typically presents as red patches with white scales on top. Areas of the body most commonly affected are the back of the forearms, shins, navel area, and scalp. Guttate psoriasis has drop-shaped lesions. Pustular psoriasis presents as small non-infectious pus-filled blisters. Inverse psoriasis forms red patches in skin folds. Erythrodermic psoriasis occurs when the rash becomes very widespread, and can develop from any of the other types.Fingernails and toenails are affected in most people with psoriasis at some point in time. This may include pits in the nails or changes in nail color.
Psoriasis is generally thought to be a genetic disease that is triggered by environmental factors. In twin studies, identical twins are three times more likely to be affected compared to non-identical twins. This suggests that genetic factors predispose to psoriasis. Symptoms often worsen during winter and with certain medications, such as beta blockers or NSAIDs. Infections and psychological stress can also play a role.Psoriasis is not contagious. The underlying mechanism involves the immune system reacting to skin cells. Diagnosis is typically based on the signs and symptoms.
There is no cure for psoriasis; however, various treatments can help control the symptoms. These treatments include steroid creams, vitamin D3 cream, ultraviolet light and immune system suppressing medications, such as methotrexate. About 75 percent of cases can be managed with creams alone. The disease affects two to four percent of the population. Men and women are affected with equal frequency. The disease may begin at any age, but typically starts in adulthood. Psoriasis is associated with an increased risk of psoriatic arthritis, lymphomas, cardiovascular disease, Crohn’s disease and depression. Psoriatic arthritis affects up to 30 percent of individuals with psoriasis.
Johnstown is a city and the county seat of Fulton County in the U.S. state of New York. As of the 2010 Census, the city had population of 8,743. The city was named after its founder, Sir William Johnson.
The city of Johnstown is mostly surrounded by the town of Johnstown, of which it was once a part when it was a village. Also adjacent to the city is the city of Gloversville. The two cities are together known as the “Glove Cities”. They are known for their history of specialty manufacturing. Johnstown is located approximately 45 miles (72 km) west of Albany, about one-third of the way between Albany and the Finger Lakes region to the west.
Johnstown, originally “John’s Town”, was founded in 1762 by Sir William Johnson, a Baronet who named it after his son John Johnson. William Johnson came to the British colony of New York from Ireland in 1732. He was a trader who learned American Indian languages and culture, forming close relationships with many Native American leaders. He was appointed as the Superintendent of Indian Affairs, as well as a major general in the British forces during the French and Indian War (Seven Years’ War). His alliances with the Iroquois were significant to the war.
As a reward for his services, Johnson received large tracts of land in what are now Hamilton and Fulton counties. He established Johnstown and became one of New York’s most prosperous and influential citizens. He was the largest landowner in the Mohawk Valley, with an estate of more than 400,000 acres (1,600 km2) before his death. Having begun as an Indian trader, he expanded his business interests to include a sawmill and lumber business, and a flour mill that served the area. Johnson, the largest slaveholder in the county and perhaps in the state of New York, had some 60 enslaved Africans working these businesses. He also recruited many Scots-Irish tenant farmers to work his lands. Observing Johnson’s successful business endeavors, the local Native American inhabitants dubbed him Warragghivagey, or “he who does much business.”