Boucle yarn is a loose, three ply yarn with a characteristic curly appearance. Used in weaving, knitting, and crocheting, boucle...
Cold agglutinins are antibodies that cause clumping or agglutination of RBCs at cold temperatures in individuals with certain conditions or who are infected by particular organisms. Cold agglutinins are associated with Mycoplasma pneumoniae infection. M. pneumoniae has i antigen specificity to human RBC membranes. Fetal cells largely contain i antigens, but by 18 mo most cells carry the I antigen.
Agglutination reaction. Agglutination refers to a clumping that occurs when an antigen comes into contact with its corresponding antibody. This process mimics what happens in the body when antibodies cause antigens to agglutinate, promoting easy removal of the infectious organism.