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Medical Dictionary

persistent

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adjective per·sis·tent \-tənt\

Medical Definition of persistent

  1. 1:  existing or continuing for a long time: asa:  effective in the open for an appreciable time usually through slow volatilizing <mustard gas is persistent>b:  degraded only slowly by the environment <persistent pesticides>c:  remaining infective for a relatively long time in a vector after an initial period of incubation <persistent viruses>

  2. 2:  continuing to exist despite interference or treatment <a persistent cough> <has been in a persistent vegetative state for two years>





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