Strain number,STATA output on 50 % lysis of erythrocytes,STATA output on 50 % death of chicken fibroblasts,STATA output on 50 % death of chicken embryos 192,chi-squared = 4.857 with 5 d.f.,chi-squared = 4.429 with 5 d.f.,chi-squared = 4.286 with 5 d.f. ,probability = 0.4336,probability = 0.4895,probability = 0.5091 ,,, ,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.4159 ,,, 340,chi-squared = 5.000 with 5 d.f.,chi-squared = 4.857 with 5 d.f.,chi-squared = 4.429 with 5 d.f. ,probability = 0.4159,probability = 0.4336,probability = 0.4895 ,,, ,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.4159 ,,, 362,chi-squared = 5.000 with 5 d.f.,chi-squared = 5.000 with 5 d.f.,chi-squared = 4.286 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.5091 ,,, ,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.4159 ,,, 522,chi-squared = 4.857 with 5 d.f.,chi-squared = 4.429 with 5 d.f.,chi-squared = 3.571 with 5 d.f. ,probability = 0.4336,probability = 0.4895,probability = 0.6126 ,,, ,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.4159 ,,, 525,chi-squared = 5.000 with 5 d.f.,chi-squared = 4.857 with 5 d.f.,chi-squared = 4.429 with 5 d.f. ,probability = 0.4159,probability = 0.4336,probability = 0.4895 ,,, ,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f.,chi-squared with ties = 5.000 with 5 d.f. ,probability = 0.4159,probability = 0.4159,probability = 0.4159