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Chlordecone disapperance in tissues of contaminated growing ruminants after the end of the exposure

International Symposium on Polycyclic Aromatic Compounds, 13-17 septembre, Bordeaux, France

Lastel, M.-L., Fournier, A., Jurjanz, S., Feidt, C., Rychen, G.

2015

Chlordecone (CLD) is an organochlorine pesticide whose extended use led to the contamination of almost 20% of agricultural soils from French West Indies. Livestock reared on polluted areas are involuntary contaminated by CLD and their level of contamination may exceed the threshold values set by the European Union. Therefore, characterizing the CLD behavior in farm animals appear as a real issue in terms of food safety for local populations. The aim of this experiment was (i) to characterize the CLD disappearance in various tissues after the cessation of exposure and (ii) to evaluate the potential effect of body fatness on this process. Thus, two groups of 8 kids were submitted to either a basal diet or a high energy diet during seven weeks before being intravenously contaminated with 1 mg CLD.kg-1 body weight. This nutritional plan resulted in both groups of kids with significant differences in terms of body fatness composition. Two days after CLD contamination, half of kids of each experimental group were slaughtered in order to determine CLD levels in blood, liver, fat and empty carcass. The remaining animals were submitted to a 30-d decontamination period before slaughtering and CLD measurements as described above. A 30-d decontamination period was sufficient to observe a decrease of CLD levels by more than 75% in both experimental groups and neither CLD concentrations nor CLD amounts were significantly affected by the diet. Overall, this study reveals that CLD in its native form disappears from the animal organism in a rather short time.

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