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EXPOSITION CHRONIQUE [1 record]

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Record 1 1989-03-31

English

Subject field(s)
  • Toxicology
  • Occupational Health and Safety
DEF

... a long-duration, low-level exposure in which the rate of exposure exceeds the body's capacity for detoxification of the substance.

CONT

Experimental exposure may be acute - that is, an exposure in which the dose is delivered in a single event and absorption is rapid. Although this type of exposure is usually short, an acute exposure may produce chronic effects. In contrast, there is a need to assess effects under chronic exposure conditions in which the dose is delivered at some frequency (daily or weekly usually) over a period of time.

French

Domaine(s)
  • Toxicologie
  • Santé et sécurité au travail
CONT

Il faut [...] faire la distinction entre une exposition aiguë ou chronique et des effets aigus ou chroniques. Ainsi, une seule dose de [...] TOCP produit, chez l'homme, une lésion nerveuse permanente. Une exposition aiguë a donc entraîné un effet chronique. Dans certains cas, suite à une exposition aiguë ou subaiguë, la lésion n'apparaîtra qu'après une période de latence.

OBS

La source RAMEC parle d'«exposition permanente», «exposition à long terme» ou d'«exposition prolongée» et rejette l'adjectif «chronique» (voir fiche «intoxication chronique») mais nous pensons que ces termes équivalent plutôt à ce que l'anglais dénomme «long-term exposure» (voir cette fiche).

Spanish

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