| 单词 | defective virus |
| 释义 | > as lemmasdefective virus defective virus n. (a) infectious material (from a person or animal) which fails to induce immunity when used for vaccination; cf. virus n. 2a (now rare or disused); (b) a virus or virus particle which lacks some or all of the genes necessary for its replication.Defective viruses retain the ability to infect cells but not to replicate within them. Some defective viruses, such as hepatitis D virus, are able to replicate in the presence of another virus (helper virus) which supplies the genetic information lacking in the defective virus. ΚΠ 1839 London Med. Gaz. 16 Feb. 763/2 Two important questions arise..: first, how far the deterioration of vaccine security is owing to defective virus, imperfect modes of vaccination, or other causes under our control. 1926 Oelwein (Iowa) Daily Reg. 14 Dec. 1/5 Damage amounting to approximately $40,000 was claimed..because of alleged loss of business resulting from the use of defective virus and serum. 1960 Proc. National Acad. Sci. U.S.A. 46 63 Acridine dyes are reported to cure virus infection, produce defective virus, and induce virus mutants. 2002 S. P. Hardy Human Microbiol. iii. 79 Delta agent is a defective virus that infects humans and can only replicate in cells that have also become infected with hepatitis B virus. < as lemmas |
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