Organ pipes are generally made out of either metal or wood. Very rarely, glass, porcelain, plastic, paper, Papier-mÃ¢chÃ©, or even stone pipes may be seen. A historical organ in the Philippines has pipes made exclusively of bamboo. Metal pipes are usually made of lead; for increased rigidity it is alloyed with tin along with trace amounts of antimony and copper.
Lyme Disease IgM antibodies usually appear 1-2 weeks after an initial exposure and return to normal after about 6 to 8 weeks. IgG antibodies are detectable in most people 4-6 weeks after exposure but may be detectable sooner in some people. IgG antibodies may persist indefinitely.
Classes of antibodies: 1  IgG - provides long-term immunity or protection. 2  IgM - first antibody produced in response to an antigenic stimulus. 3  IgA - found in secretions.  IgE - involved in allergic 1  reactions. IgD - not much known about 2  it. Most important classes of antibodies in blood banking are IgM and IgG, and to a certain extent  IgA.