Ecotoxicological and Genotoxic Evaluation of Buenos Aires City (Argentina) Hospital Wastewater
Table 3
Mitotic index (MI) and frequency of chromosomal aberrations (CA) and micronucleus (MN) in 5000 cells analyzed (mean ± deviation) of Allium cepa meristematic cells after exposure to the wastewater samples from hospital and Berazategui plant.
Samples
MI
CA
MN
April
Negative control
13.06 ± 3.59
0.75 ± 0.96
0
Monday
9.30 ± 0.61
2.33 ± 1.15
0
Tuesday
9.91 ± 2.70
4.67 ± 1.53a
0
Wednesday
8.65 ± 2.90
2.00 ± 1.00
0
Thursday
11.05 ± 1.25
2.00 ± 0.05a
0
Friday
14.09 ± 3.30
1.25 ± 1.26
0
June
Negative control
58.24 ± 10.24
0.85 ± 1.05
0
Monday
62.44 ± 1.52
0.67 ± 1.15
0.67 ± 0.58
Tuesday
62.86 ± 4.35
0.75 ± 0.50
0.50 ± 1.00
Wednesday
73.16 ± 4.55
0.50 ± 0.71
0
Thursday
65.11 ± 2.86
1.00 ± 1.22
0
Friday
57.36 ± 10.63
1.00 ± 0.82
0
July
Negative control
58.24 ± 10.24
0.85 ± 1.05
0
Monday
47.25 ± 11.31
0.75 ± 0.95
0.75 ± 0.95
Tuesday
56.91 ± 8.42
2.00 ± 0.10a
0
Wednesday
59.92 ± 9.82
2.00 ± 1.73
1.33 ± 1.53
Thursday
61.16 ± 2.94
1.75 ± 0.96a
1.00 ± 1.41
Friday
53.74 ± 14.96
1.75 ± 1.71
0.25 ± 0.50
September
Negative control
63.33 ± 1.16
0.92 ± 0.06
0
Monday
59.27 ± 5.87
2.25 ± 2.21
0.75 ± 0.50a
Tuesday
62.34 ± 6.94
1.40 ± 1.14
0.20 ± 0.45
Wednesday
62.49 ± 6.19
2.50 ± 1.29a
1.00 ± 2.00
Thursday
63.27 ± 7.41
1.33 ± 0.58
2.00 ± 1.00a
Friday
63.03 ± 7.97
3.00 ± 1.73a
0.33 ± 0.57
Berazategui plant
Negative control
56.10 ± 11.39
0.75 ± 0.96
0
April
57.09 ± 9.76
0.43 ± 0.53
1.00 ± 1.15
MMS
69.03 ± 4.86
1.80 ± 0.84a
aSignificantly different from negative control (), according to Kruskal-Wallis test.
