Threadworm Problem And advice on a friend?

One dose kills the worm - but you need to do everyone in the household and also a strict hygeine regime around the home to rid yourself of them. threadworm eggs can survive for up to two weeks outside the body. They fall off the skin around the and can fall onto bedding, clothes, etc. They can then get 'wafted' in the air as you change clothes, bedding etc, and become part of the dust in a home. Some eggs may settle on food or toothbrushes. So, children may swallow some eggs at first by playing with other children who have eggs on their fingers, or from food, drink, toothbrushes, or dust that has been contaminated with threadworm eggs.