ISSN 1003-8280 CN 10-1522/R 中国疾病预防控制中心 主办
【Abstract】 Objective To study the resistance of Rattus rattus sladeni to anticoagulant rodenticide. Methods No?choice food test was used in this study according to the method of national rodent resistance surveillance group. Results The rodents caught in nine districts of Guangzhou were tested. The survival rate was 3.8%. The total average dosage was 30.31 mg/kg, and survival average dosage was 58.29 mg/kg. The result showed that its sensitivity to anticoagulant rodenticide was between R.tanezumi and R.norvegicus. Conclusion The anticoagulant rodenticide can be still used to the control of R.rattus sladeni. But it should strengthen the resistance surveillance, and the chemicals should be used scientifically and rationally.
【Abstract】 Objective To understand the population composition of rat?shape rodents in Guangdong province and its breeding in different seasons, and to provide the theoretical basis for the control of rodents. Methods Rodents were caught daily by snap trap method in township sampled randomly monthly. The rodents captured were identified and dissected, recording the pregnancy situation. Results The trapping rate of rat?shape rodents was 9.98% in the residential areas, including 4.98% of rats. It included 48.73% Rattus norvegicus, 15.50% R.tanezumi mice, 35.17%Suncus murinus and 0.59% Mus musculus. The average pregnancy rate of R.norvegicus was 4.06% and the average litter size was 5.35. The average pregnancy rate of R.tanezumi was 5.63% and the average litter size was 2.76. That of Suncus murinus was 15.00% and its litter size was 3.32. Conclusion R.norvegicus and Suncus murinus are the dominant species in the residential areas in township. M.musculus is the rare specie. The breeding seasons of R.norvegicus and R.tanezumi are in spring and autumn, and the breeding peak in spring is higher than that in the autumn. It has also a small reproduction peak in August. However, Suncus murinus can breed all year round, and there are also two peaks. One peak is in March?June, the other is in October?November. It should strengthen the killing of rodents in spring and autumn.