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Fourteen fattened pigs (age of 240-250 days, live weight 110-120 kg) were examined on three farms (D., M. and T.) in Hodonin district in 1994 for the content of some harmful pollutants (mercury, cadmium, lead, lindane, DDT sum, DDT isomers, lower and higher chlorinated biphenyls, PCB congeners) in the muscle, liver, kidneys and subcutaneous fat. Maximum allowable quantities (MAQ) of extraneous matters were slightly exceeded in mercury only, in 5 samples of the muscle (0.012-0.022 mg/kg). In comparison with the average contents of extraneous matters in pigs in the Czech Republic in 1994, higher concentrations of mercury (0.009 mg/kg), lead (0.124 mg/kg), lindane (0.060 mg/kg fat) and DDT sum (0.083 mg/kg) were observed in the muscle of pigs from Hodonín district. The liver of the pigs contained the highest average concentrations of lead (0.141 mg/kg), lindane (0.280 mg/kg fat), DDT sum (0.323 mg/kg fat), p,p'-DDE (0.106 mg/kg fat), p,p'-DDT (0.057 mg/kg fat). PCB-Delor 103 (0.415 mg/kg fat), PCB-Delor 106 (0.561 mg/kg fat) and PCB 118 congener (0.029 mg/kg fat). The highest average values of mercury (0.014 mg/kg) and cadmium (0.147 mg/kg) were determined in the kidneys of pigs. The ratio of lower-chlorinated biphenyls (Delor 103) to higher-chlorinated biphenyls (Delor 106) was approximately 1 : 3 in the muscle, 1 : 1 in the liver and 1 : 2 in subcutaneous fat. The per cent share of three PCB congeners, 101, 138 and 153, was highest in the muscle, liver and subcutaneous fat of pigs. The pigs from Hodonín district exhibited in 1994 the greater load of mercury, lead, lindane and DDT than in other regions of the Czech Republic, but these values did not mostly exceed the hygienic limits in force. It is desirable to observe the spectrum of indicator PCB congeners for objective evaluation of PCB load in pigs, as they indicate the contamination level with lower- and higher-chlorinated biphenyls (Delor 103 to Delor 106). Greater attention should be paid to the congener PCB 118, which is the most toxic out of the indicator congeners concerned.
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