Dinitrofluorobenzene skin test

Skin test is the most commonly used in vivo test method to determine the body's cellular immune function. It is essentially a late-onset allergy (type IV). When the body is infected by some bacteria (such as Mycobacterium tuberculosis, Brucella), virus, or fungi, or it is in contact with some small molecules or haptens, it will become a complete antigen The body will produce specifically sensitized lymphocytes against these antigenic substances. When the corresponding antigen enters the body again, the local lymphocytes will release a variety of lymphokines. After 24 to 72 hours, it will lead to inflammation mainly dominated by monocyte infiltration, manifested as redness and swelling of the skin. reaction. This response can be used as one of the indicators to judge the body's cellular immune function.