Polychlorinated biphenyls poisoning in monkey eye.

Poisoning by polychlorinated biphenyl(s) (PCB) in humans leads to cutaneous and ocular findings. A white, cheeselike secretion issuing from the orifice of the Meibomian gland duct when the eyelid is squeezed is one sign of this intoxiation. In the rhesus monkey, abnormal hyperkeratosis of the ductal epithelium was observed histopathologically.