IS THERE A NEED FOR SYSTEMATIC BLOOD LEAD SCREENING IN CANADIAN CHILDREN

Neuropsychological effects occurring in young children exposed to low blood lead levels are now better known. This paper reviews the need to systematically screen for blood lead levels compatible with subclinic al lead poisoning in young Canadian children. Using standard criteria for judging the appropriateness of this measure, the authors found no evidence to support such a practice in Canada. Case-finding is recomme nded in clinical settings for children with disorders suggestive of le ad poisoning, increased lead absorption or exposure to a potential sou rce of lead. A population survey is also recommended in the presence o f a well-documented community environmental lead source. There is a ne ed for common protocols across Canada for evaluating and treating chil dren with blood lead levels compatible with subclinical poisoning. Are as of priority research are: the impact of persistent environmental so urces of lead such as old paint and lead in water; defining criteria f or selective screening; and methods of cost-effective environmental re mediation.