1 Most of these diseases are infections, caused by a variety of bacteria, viruses, and parasites that can be foodborne. 2  Other diseases are poisonings, caused by harmful toxins or chemicals that have contaminated the food, for example, poisonous mushrooms.
(cluster designation 4) symbol for a glycoprotein expressed on the surface of helper T lymphocytes and other immune cells. CD4 serves as a receptor for human immunodeficiency virus envelope glycoprotein gp120.
CD8 cells can recognize HIV antigen on CD4 cells as foreign, and will kill infected CD4 cells, adding to loss of these cells. HIV glycoprotein in the envelope is homologous to IL-2. Thus, HIV induces production of IL-2-neutralizing autoantibodies. These antibodies plus complement can kill IL-2-bearing cells.