Word: virus
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
...extract this gene, the scientists took advantage of the fact that when a virus infects a bacterium it sometimes removes a piece of the bacterium's DNA. They infected E. coli with two types of viruses that were specifically bred to remove the lactose gene from E. coli...
...these viruses is arranged in two, loosely linked strands, with one molecular strand containing the chemical complement of the other. These long molecules are ordinarily coiled around each other in the head of a virus particle once it leaves the host cell...
...After isolating the viruses from E. coli, the scientists chemically separated each of the strands of DNA in thetwo virus strains...
...achieved, researchers are finding that it resulted not only from cell tests ("Pap smears") but also from many other factors. And in pursuing their search for the causes of the disease, they are amassing evidence suggesting that many, perhaps most cases of uterine cancer are triggered by a common virus transmitted during sexual contact. This does not mean that uterine cancer is either an "infectious" or "venereal" disease in the usual sense; but it does suggest measures by which the disease might, to a great extent, be prevented...
...Suspect Virus. A link between cervical cancer and poor hygiene, plus lack of circumcision, would be easier to explain if an infectious agent could be implicated. Researchers at Baylor University have found a suspect. It is a virus technically known as Herpesvirus hominis, Type II, closely related to the herpes virus, Type I, which causes fever blisters around the mouth. Type II infects the genital regions of both sexes; it is found in smegma, the secretion under the foreskin, and is readily transmitted during sexual contact...