A useful screening test for lead is measurement of which of the following?: (A) Coproporphyrin in urine, (B) Amino laevelunic acid in urine, (C) Basophil in urine, (D) Lead in morning urine sample
Answer is A. Coproporphyrin in urine: Useful screening test. <150ug/L in non exposed persons. Amino laevulinic acid in urine: indicates lead absorption if > 5mg/L Lead level in urine: if >0.8 mg/L indicates lead exposure and absorption Basophillic stippling of RBC : sensitive parameter of hematological response Ref: Park's textbook of Preventive and Social Medicine, 21st Edition, Page-749