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.
  HIV, the human immunodeficiency virus, is itself a pathogen. HIV is a virus. HIV itself is a pathogen Human Immunodeficiency virus cause HIV/AIDS disease it belongs to r â¦ etro virus which has ability to convert mRNA to DNA the reverse transcription and possess reverse transcriptase enzyme.2 people found this useful.IV is a virus. HIV itself is a pathogen Human Immunodeficiency virus cause HIV/AIDS disease it belongs to r â¦ etro virus which has ability to convert mRNA to DNA the reverse transcription and possess reverse transcriptase enzyme. 2 people found this useful.