| Treatment | 
        Dose /Egg (mg) | 
        Treatment day  
          hr of incubation with Cd | 
        Day of Sampling | 
        % MNE 
            (Mean ± SD) | 
        PCE:NCE | 
       
      
        | Control (saline) | 
        - | 
        d 12 (24 hr) | 
        d 13 | 
        0 | 
        0 | 
       
      
        | d 11 (48 hr) | 
        0 | 
        0 | 
       
      
        | d 10 (72 hr) | 
        0 | 
        0 | 
       
      
        Positive control  
          (Cyclophosphamide) | 
        50 µg | 
        d 12 (24 hr) | 
        d 13 | 
        1.51±0.03a | 
        1 | 
       
      
        | d 11 (48 hr) | 
        5.31±0.12a | 
        1 | 
       
      
        | d 10 (72 hr) | 
        10.17±0.10d | 
        1 | 
       
      
        | CdCl2 | 
        40 µg | 
        d 12 (24 hr) | 
        d 13 | 
        3.63±0.19b | 
        1.03 | 
       
      
        | d 11 (48 hr) | 
        5.43±0.28a | 
        1.05 | 
       
      
        | d 10 (72 hr) | 
        5.68±0.31a | 
        1.054 | 
       
      
        | CdCl2 | 
        50 µg | 
        d 12 (24 hr) | 
        d 13 | 
        5.76±0.31 c | 
        1.04 | 
       
      
        | d 11 (48 hr) | 
        6.81±0.09 b | 
        1.11 | 
       
      
        | d 10 (72 hr) | 
        7.37±0.30b | 
        1.07 | 
       
      
        | CdCl2 | 
        60 µg | 
        d 12 (24 hr) | 
        d 13 | 
        7.76±0.18d | 
        1.04 | 
       
      
        | d 11 (48 hr) | 
        8.60±0.16c | 
        1.02 | 
       
      
        | d 10 (72 hr) | 
        8.92±0.29c | 
        1.01 | 
       
      | 
  
  
    | Values are expressed as mean ± SD of 6 animals in each group. p<0.05 versus the control group; Different letters are significantly different at the level of p<0.05. MNE:   Micronuclei Erythrocytes | 
  
  
    | Table 1: Micronucleus test performed on 13-day-old chick embryos treated with cyclophosphamide and cadmium at different time intervals |