87.

Prevot PA, Sulotto F, Poli G, Parigi A. Environmental lead pollution and the principal biological indexes for evaluating the risk of lead poisoning. Lav. Um. 1969; 21(5):200-209. (CA72) Studies were made on car body factory workers during 3 different periods: during the 1st period the Pb amt. in the used alloy was higher than 75%, during the 2nd period the Pb amt. was 40-5%, and it was 25% during the 3rd period. During this last period, Na and Ca versenate were taken orally by the workers. During each period, urinary coproporphyrins, erythrocitro-protoporphyrins, urinary Pb, and blood Pb amts. were detd. as well as the Hb% and the no. of blood red cells. Clin. symptoms were examd. Urinary and blood Pb amts. decreased from the 1st to the 3rd period. The use of versenate gave very good results. Urinary coproporphyrins and erythrocitro-protoporphyrins amts. were very variable and the best significant parameter for the Pb poisoning risk evaluation was the blood Pb values.

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