HLTB21H3 Chapter Notes - Chapter 5: Zoonosis, Safe Sex, Anal Sex
Document Summary
Aids is a deadly disease for which there is no cure or vaccine. It is the first pandemic of the 21st century. Aids- the virus called the human immunodefiency. Kaposi"s sarcoma: red-purple blotching on the skin. The virus was renamed human immunodefiency virus (hiv), and the complex disease it produced was called acquired immunodefiency disease syndrome (aids) Hiv is a virus- an entity that one biologist defined as a bit of bad news wrapped in protein : a virus is spherical in shape, resembling a 20-sided soccer ball. With a diameter of only 1,00 angstrom: viruses are not cells, but they are able to reproduce themselves by taking over the machinery of a living cell, they are the ultimate parasite. The discovery of hiv began more than a century ago. Replication of rna viruses involves the transfer of information from the viral dna copy, and that the viral dna was integrated into the chromosomes of the transformed cancer cells.
