Abstract
The microsomal monooxygenase system in the housefly is well-characterized, active, inducible and inhibited by the same types of compounds as in vertebrate systems. Flies metabolize PCBs to polar products and retain congeners from a commercial mixture in proportions consistent with PCB biotransformation and elimination in vertebrates. Although TCDD has been shown to have a high affinity for, and be an effective agonist of the juvenile hormone receptor in insects, toxic manifestations in adult insects may differ from those in certain highly sensitive vertebrate species. This study was undertaken to determine if the housefly bioassay could effectively compare the net adverse biological activity of a group of PCB congeners independent of Ah receptor effects.
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