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.
Following initial infection with HIV, the rapid emergence of cytolytic T-cell responses, largely CD8+ T-cell responses, is associated temporally with a decrease in plasma levels of HIV.(21) CD8+ T cells may help control HIV replication in several ways.