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.
High titers of cold agglutinins may be caused by infections, such as pneumonia caused by mycoplasma, mononucleosis, hepatitis C, or other viral infections. High titers of cold agglutinins can cause symptoms when a person is exposed to cold temperatures.