Monitoring of Lead in Topsoil, Forage, Blood, Liver, and Kidneys in Cows in a Lead-Polluted Area in Slovenia (1975–2002) and a Case of Lead Poisoning (1993)
Table 4
Mean, standard deviation (SD), and minimal-maximal concentrations of lead in the blood of cows before (1975-1976) and after the installation of bag filter system.
Year of research
Number of farms
Number of cows
Mean lead concentration in blood (mg/kg)
± SD of lead in blood (mg /kg)
Min. – max. of lead in blood (mg /kg)
2
9
1.251
0.580
0.501–2.301
5
28
0.645
0.239
0.251–1.130
1979
13
43
0.870
0.410
0.351–1.890
1980
13
57
0.478
0.290
0.180–2.080
1981
13
60
0.320
0.062
0.140–0.450
1982
13
53
0.241
0.127
0.080–0.660
1983
13
58
0.248
0.134
0.103–0.960
1984
13
60
0.179
0.048
0.094–0.311
1985
13
58
0.191
0.065
0.100–0.410
1986
12
57
0.173
0.051
0.070–0.270
1987
10
44
0.213
0.087
0.110–0.430
1989
12
60
0.195
0.041
0.120–0.320
1990
12
59
0.202
0.073
0.060–0.380
1991
12
60
0.150
0.034
0.061–0.230
1992
12
60
0.098
0.072
0.040–0.320
1993
1
27
0.112
0.138
0.050–0.710
1994
2
15
0.095
0.013
0.070–0.113
1995
6
106
0.158
0.052
0.070–0.280
1996
6
30
0.164
0.039
0.095–0.238
1997
14
59
0.161
0.028
0.021–0.580
1998
14
59
0.109
0.022
0.010–0.267
1999
14
58
0.087
0.019
0.015–0.129
2000
14
57
0.073
0.011
0.024–0.160
2001
12
51
0.131
0.143
0.002–0.581
2002
12
51
0.069
0.041
0.004–0.174
Time before the installation of bag filter system.
