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.
In some cases, IgM antibodies may also be present if a latent infection has reactivated. IgG antibodies typically develop within a month of infection and persist for the rest of the person's life. Testing for both types of antibodies is useful for determining if a person has had a recent or past exposure to EBV. Epstein-Barr Virus is one of the most common viruses with as many as 95% of the people in the U.S. having been exposed by the age of 40. In many people the virus causes no symptoms.