关键词: 褐家鼠, 黄胸鼠, 抗药性

Abstract: The authors monitored the anticoagulant resistance of Rattus norvegicus and Rattus flavipectus, from Oct. to Nov. 1991 and from Nov.to Dec. 1991. 22(♂9,♀13)and in l993 24(♂14,♀10)Rattus nortIegiclIs and 14(♂8,♀6)Rattus flavipectus was tested The result shows that for Rattus norvegicus in 1991 the average lethal dosage is 9.63mg/kg, death happens 4.5 days after the distribution. The anticoagulant resistance rate is zero However in 1993 the average lethal dosage changed to 19.54mg/kg, the average death happens after 5.35 days with one survival.The average lethal dosage doubled in two years and the duration before death prolonged l1early one day, For Rattus flavipectus the averge lethal dosage is 143.81 mg/kg, average duration before death is 8.43 days and no survital found. The author sugest that the anticoagulant resistance test must be given after six years of distribution in order to prevent the anticoagulant resistance.