Toxicodendron radicans, commonly known as eastern poison ivy or poison ivy, is a poisonous Asian and North American flowering plant that is well known for causing an itching, irritating, and sometimes painful rash in most people who touch it, caused by urushiol, a clear liquid compound in the plant's sap.
Boil: Introduction. A boil is a large infection of a hair follicle, the tiny opening in the skin from which a hair grows. Boils are due to an invasion of bacteria that enter the follicle and cause a bacterial infection of the follicle and nearby skin. Boils are also called skin abscesses or furuncles.
Boils and carbuncles are often caused by a type of bacteria known as Staphylococcus aureus (staph bacteria) infecting one or more hair follicles. Staph bacteria usually live harmlessly on the surface of the skin or in the lining of the nose.Boils tend to occur when the bacteria enters the skin through cuts and grazes.This causes your immune system to respond by sending infection-fighting white blood cells to kill the bacteria. Over time, a mix of dead bacteria, dead white blood cells and dead skin cells builds up inside the boil to form pus.arbuncles. A carbuncle is a dome-shaped collection of boils that usually develops over the space of a few days. They most often occur on the back, thighs, or the back of the neck. A fully grown carbuncle can be more than 10cm (4 inches) in size, and will leak pus from a number of points.