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.
It has a half-life of approximately 10 days. (1) IgM will appear in the B cell membrane (followed shortly by IgD) prior to an encounter with its homologous epitope. (2) IgM is the predominant antibody in the early (primary) immune response to most antigens. (3) IgM is the predominant antibody produced by the fetus. An elevated IgM level in the cord serum of a newborn (normal level, approximately 10 mg/dl) may indicate that the fetus was infected before birth.