HLTB21H3 : AIDS_
Document Summary
Aids ( acquired i mmunodeficiency syndrome) no cure or vaccine. aids is caused by the virus hiv (human immunodeficiency virus) hiv spherical in shape, resembling a 20-sided soccer ball. h i v attacks the immune system. cannot be seen with naked eye or the light microscope, only with electron microscope. h i v discovered in 1884 with the development of a porcelain filter by charles. Chamberland, who was working in the laboratory of louis pasteur. a few years later 1898, dmitri ivanowski took the mottled, dying leaves from a tobacco plant with mosaic disease, ground them up, and filtered the extract through a chamberland filter. When the recovered sap was introduced into healthy plants, it produced the symptoms of disease as did the unfiltered sap. renato dulbecco discovered the virus had been incorporated into the host cell genes and behaved as if it were a part of the cell"s genetic apparatus.
