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.
The first antibody produced is manily IgM (although small amounts of IgG are usually also produced). 2Â° Immune Response If a second dose of the same antigen is given days or even years later, an accelerated 2Â° or anamnestic immune response (IR) occurs. This lag phase is usually very short (e.g. 3 or 4 days) due to the presence of memory cells. The amount of antibody produced rises to a high level. Antibody level tends to remain high for longer. The main type of antibody produced is IgG (although small amounts of IgM are sometimes produced).