| attenuated | <microbiology, virology> To reduce the virulence (infectivity) of a pathogenic microorganism. (27 Sep 1997) |
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| attenuated tuberculosis | A mild chronic form marked by caseous tubercles of the skin and the occurrence of cold abscesses. (05 Mar 2000) |
| attenuated vaccine | Live pathogens that have lost their virulence but are still capable of inducing a protective immune response to the virulent forms of the pathogen, e.g., Sabin polio vaccine. (05 Mar 2000) |
| attenuated virus | A weakened virus that is no longer virulent. Can be used to make a live virus vaccine. (12 Dec 1998) |
| vaccines, attenuated | Live vaccines prepared from microorganisms which have undergone physical adaptation (e.g., by radiation or temperature conditioning) or serial passage in laboratory animal hosts or infected tissue/cell cultures, in order to produce avirulent mutant strains capable of inducing protective immunity. (12 Dec 1998) |
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