Surveillance of rodent populations in Chongqing from 2013 to 2015

YANG Xue-fan; HE Ya-ming; JI Heng-qing; FENG Shao-quan; TU Tao-tian

Abstract：Objective To understand the population density,structure and seasonal dynamics of rodents by analyzing the rodent surveillance data in Chongqing from 2013 to 2015,and provide scientific basis for rodent control in Chongqing.Methods The rodent trace method was carried out in outdoor areas,while the sticky mouse plate method in the indoor.Surveillance was taken once in mid of March,June,September and November from 2013 to 2015.Results The average route index in Chongqing outdoor areas from 2013 to 2015 was 2.37 place/km,and the highest was 2.46 place/km in 2015.The average catching rate in indoor areas was 3.89％,and the highest was 4.28％ in 2013.The density of rodents in garbage transfer stations and public toilets around were significantly higher than other monitoring sites in the outdoor areas,while the farmers market and restaurants in the indoor areas.The peak of rodent activity appeared in March and September.Mus musculus was the dominant species,accounting for 45％ of all captured rodents.Conclusion The rodent population density and seasonal dynamics in Chongqing are better understood.According to this,it is suggested to take integrated control measures on the basis of environmental governance.Besides,the long-term surveillance of rodents should be strengthened continuously,and rodent control and deratization actions should be carried out before the peak time to reduce the incidence of rodent-borne diseases.