WHAT IS COLD AGGLUTININ TITER TEST?
Cold agglutinins are antibodies that cause clumping or agglutination of type O red blood cells at cold temperatures. The cold agglutinin titer tests for cold agglutinins at 2-8 degrees C—those antibodies that result from M. pneumoniae infection. A titer is the highest dilution of a serum that will demonstrate a specific antigen-antibody reaction. M. pneumoniae is a nonbacterial infective agent that causes pneumonia characterised by fever and a nonproductive or nonpurulent cough.