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.
To determine if IgM antibody is true antibody, the serum is absorbed with anti-human IgG antibody (Gullsorb test) to remove IgG prior to testing for IgM. A concurrent test with PBS in place of Gullsorb is the control. Table 2 shows examples of tests with MIF IgM-positive patient sera.