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.
In essence, HIV is a spherical virus with several protein coats. The proteins (antigens) on the outside envelope allow HIV to attach to CD4 antigens and infect the T lymphocyte. (The CD4 glycoprotein becomes a receptor for HIV in certain differentiated T lymphocytes. See glossary for more details.) Dr. Montagnier's discovery goes beyond the development of measures to prevent the transmission of AIDS.