Tests for lead poisoning

A simple blood lead test can be done to detect the level of lead in your body. Sometimes a second test, called a zinc protoporphyrin (ZPP) test, is requested in place of a blood lead test if the lead test is not available, or requested along with the blood test. The ZPP result increases when lead interferes with red blood cell’s ability to make haemoglobin. Some experts question the value of ordering both tests at once, and the ZPP test is not reliable for screening children for lead poisoning.

In 1997, the Centers for Disease Control and Prevention (CDC) issued revised screening guidelines for all children for elevated blood lead, except those in communities or neighbourhoods found not to be at risk. The CDC released guidelines for action, including testing intervals, for blood lead levels in children.

Tests: Lead; zinc protoporphyrin