Related Experiment Videos
Mercury concentrations in cattle from NW Spain
M López Alonso1, J L Benedito, M Miranda
1Departamento de Patoloxía Animal, Facultade de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain. mlalonso@lugo.usc.es
The Science of the Total Environment
|January 16, 2003
Summary
Mercury levels in Spanish cattle were assessed, with higher kidney concentrations found in rural Galicia than industrial Asturias. Residues did not pose a health risk to animals or humans.
Area of Science:
- Environmental Science
- Toxicology
- Veterinary Medicine
Background:
- Mercury is a toxic environmental pollutant from industrial and agricultural activities.
- Domestic animals can accumulate mercury, potentially contaminating human food sources.
- Data on mercury residues in Spanish livestock were previously unavailable.
Purpose of the Study:
- To quantify mercury concentrations in cattle tissues and blood from Galicia and Asturias, Spain.
- To investigate regional differences in mercury accumulation in cattle.
- To assess potential health risks associated with mercury residues in cattle.
Main Methods:
- Analysis of total mercury concentrations in liver, kidney, muscle, and blood samples.
- Study included 284 calves and 56 adult cows from north-west Spain.
- Samples were collected from rural Galicia and industrial Asturias regions.
Main Results:
- Mercury was frequently detected in kidneys (62.4-87.5%), but rarely in liver, muscle, or blood.
- Kidney mercury levels were higher in female calves than in cows.
- Unexpectedly, higher kidney mercury concentrations were found in calves from rural Galicia compared to industrial Asturias.
Conclusions:
- Mercury residues in cattle from north-west Spain are generally low and comparable to non-polluted areas globally.
- The detected mercury levels do not present a significant risk to animal or human health.
- Regional differences in mercury accumulation warrant further investigation.