Parasitism is a relationship in which one organism (the parasite) benefits while the other(the host) is harmed. This is a positive, negative relationship. (Campbell)( Dionne L Rice Jr) The parasite usually lives on or inside the other organism. For example, mosquito is a parasite, feeding on a human while transferring the disease called Malaria.
Artificial brush fibres are most commonly made of nylon and polyethylene, though vinyl and steel wire are also used for certain applications. Nylon fibres are either tapered and split like hog bristles for use in paintbrushes or left untapered for making cleaning brushes, hair brushes, and toothbrushes.
The modern-day toothbrush is typically constructed out of a plastic handle and nylon bristles. The modern day toothbrush handle comes in many varieties, including handles that are straight, angled or curved. Toothbrush heads also come in a variety of shapes and sizes for people of all ages and sizes.