Of the isolates tested , the percentage of strains resistant to ampicillin was not applicable 测试样本中,对氨青霉素的抗药性测试是不适用的。
Of the isolates tested , the percentage of strains resistant to ampicillin was not applicable according to the national committee for clinical laboratory standards or not performed 没有对氨青霉素的抗药性进行或测试根据美国national committee for clinical laboratory ,对氨青霉素的抗药性测试是不适用的。