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.
Glycoproteins can protrude from the envelope, and can be used in adhesion to the host cell. A well known glycoprotein is hemagluttinin, which is found on the surface of the influenza virus. Genetic information is carried in viruses by either RNA or DNA.The genome of a virus can be either single stranded RNA (ssRNA), double stranded RNA (dsRNA), single stranded DNA (ssDNA), double stranded DNA ds(DNA), or a mix of ssDNA and dsDNA.n enveloped viruses, the virion inserts its own proteins and lipids into the host-cell derived membrane. These proteins can include a matrix protein (M protein), which is in contact with the nucleocapsid and lines the inner side of the envelope.