Related Experiment Video
Updated: Oct 1, 2026
Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance
Published on: August 18, 2023
Lead poisoning in new immigrant children from the mainland of China
Siucheung Ling1, Chunbong Chow, Albert Chan
1Department of Paediatrics, Princess Margaret Hospital, Hong Kong, SAR, China. scling@hutchcity.com
Insights
Lead poisoning is common in new immigrant children from China. Environmental factors like contaminated water and herbs were key risks, but most children
Area of Science:
- Environmental Health
- Pediatric Health
- Toxicology
Background:
- Lead poisoning poses significant health risks to children.
- Immigrant populations may face unique environmental exposures.
- Understanding lead exposure in pediatric populations is crucial for public health interventions.
Purpose of the Study:
- To determine the prevalence, severity, and risk factors of lead poisoning.
- To investigate lead exposure in children immigrating from mainland China to Hong Kong.
- To identify environmental and behavioral contributors to elevated blood lead levels (BLL).
Main Methods:
- Recruited 457 immigrant children under 18.
- Measured venous blood lead levels (BLL) within 7 days of arrival.
- Assessed risk factors and symptoms for elevated BLL (>0.48 mumol/L).
Main Results:
- 18.1% of children had BLL > 0.48 mumol/L; 2.6% had BLL > 0.71 mumol/L.
- Identified risk factors: contaminated water, herb ingestion, pica, and environmental exposures.
- Symptoms like abdominal pain and learning difficulties did not correlate with BLL.
Conclusions:
- Lead poisoning is prevalent in this pediatric immigrant group.
- Environmental factors are primary contributors to lead exposure.
- Behavioral factors, such as herb ingestion, may prolong elevated BLL in some cases.
Objective:
To define the prevalence, severity and risk factors for lead poisoning in new immigrant children from the mainland of China to Hong Kong, China.
Methods:
New immigrant children from the mainland of China under 18 years of age were invited to join the study. Their growth parameters and venous blood lead levels (BLL) were measured within 7 days of arrival. Those with elevated BLL i.e. > 10 micrograms/dl (0.48 mumol/L) were assessed for signs, symptoms and risk factors of lead poisoning. Education on the prevention of lead poisoning and follow up BLL measurements were offered until their BLL normalized.
Results:
Four hundred and fifty-seven children were recruited. Among them, 18.1% and 2.6% had BLL > 0.48 and 0.71 mumol/L, respectively. None had BLL > 0.96 mumol/L. Possible risk factors included contaminated drinking water (19%), herb ingestion (17.5%), pica, playing in dumping grounds, residing near paint factories or highways, habitual inhalation of car exhaust and cooking with petroleum. Symptoms and signs included abdominal pain, headache, short stature, and learning difficulties but did not correlate with BLL. None required treatment except for counseling on the avoidance of risk factors. About 94.7% showed a reduction in BLL 2-3 months after arrival and before counseling. All had normalized BLL by 9 months except 1 who had an X-ray feature of lead line.
Conclusions:
Lead poisoning is common in new immigrant children from the mainland of China. Environmental factors were most important while behavioral factors like regular herb ingestion might have contributed to the persistence of high BLL in the minority.
More Related Videos
Related Concept Videos
01:36Types of Toxins
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
01:26Pharmaceutical Poisoning: Treatment Strategies
01:26Pharmaceutical Poisoning: Potential Scenarios
01:23Toxicity Testing in Animals