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Table 1 Behavior of C. elegans following dichlorvos exposure

From: Alterations in gene expression in Caenorhabditis elegans associated with organophosphate pesticide intoxication and recovery

Dichlorvos (μM)

Continuous exposure

4 h wash-out

Reduced movement

24 h

3 h post washout

20 h post washout

15.0

10 min

immobile

reduced motility

motility returned to control levels

3.0

40 min

immobile

reduced motility

motility returned to control levels

0.6

4 h

sluggish

motility returned to control levels

motility returned to control levels

0.12

NOE

NOE

NOE

NOE

  1. Worms were exposed to various concentrations of dichlorvos either continuously for 24 h or for 4 h followed by removal of the dichlorvos and recovery in fresh medium for 3 or 20 h. Worms were examined microscopically, and the amount of movement compared with controls was recorded.