Lymphocytes are a kind of white blood cells which are vital and necessary for maintaining immunity in human body. They are approximately 7 to 8 micrometers long. They are made in the lymphatic tissues of the body and are carriers of lymphatic fluids to the blood. There are 2 kinds of lymphocytes -- T-lymphocytes or T-cells, and B-lymphocytes or B-cells.
There is a normal count of these lymphocytes, increase or decrease in which can cause severe damages to the human body. Sometimes, chicken pox and flu can cause the lymphocyte count to go abnormally high and a lack in the activity of the bone marrow can cause it to go down.
Since lymphocytes form an integral part of the human immunity system, imbalance in it can cause a number of infections. In increased count in the non- activated lymphocytes, the human body can acquire influenza, tuberculosis, mumps, pertussis, varicella, chronic lymphatic leukemia, acute lymphoblastic leukemia, herpes simplex virus, rubeola and brucellosis. Further, an increase in activated lymphocytes can cause cytomegalovirus infection, toxoplasmosis, infectious hepatitis, and post-transfusion and infectious mononucleosis.
In general, an increased relative lymphocyte count results in a severe case of virus, connective tissue disease, hyperthyroidism, splenomegaly and Addison’s disease. This condition is usually found in children within 2 years of age. Decrease in the lymphocyte count can causes AIDS, aplastic anemia, bone marrow suppression, and neoplasm, neurotic disorders like myasthenia gravis, multiple sclerosis and Gullain-Barre Syndrome. It is essential to avoid these situations by going for a blood check up and taking the prescribed actions as some of these diseases may be life- threatening.
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