The relationship between fleas density of Spermophilus alaschanicue and host density and meteorological factors
10.3760/cma.j.issn.2095-4255.2018.12.004
- VernacularTitle:阿拉善黄鼠寄生蚤数量与宿主数量和气象因素的关系
- Author:
Dingsheng WANG
1
;
Daqin XU
;
Pengfei GE
;
Jinxiao XI
;
Hong ZHANG
;
Bin WU
;
Shiming WANG
;
Yongzhi GAI
Author Information
1. 甘肃省疾病预防控制中心鼠疫布病预防控制所
- Keywords:
Muridae;
Siphonaptera;
Yersinia pestis;
Meteorological factor;
Correlation analysis
- From:
Chinese Journal of Endemiology
2018;37(12):965-968
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the relationship between fleas density of Spermophilus alaschanicue and host density as well as meteorological factors.Methods The densities of fleas of Spermophilus alaschanicue and meteorological temperature,precipitation,relative humidity data in the same period from 1977 to 2014 in plague natural foci of Spermophilus alaschanicue of Gansu Province were collected.In order to further establish the multiple linear regression and the stepwise regression analysis model,SAS 9.3 software was used to explore the linear correlation analysis between fleas index number,density of Spermophilus alaschanicue and meteorological factors.Results The average body flea index positively correlated with the density of Spermophilus alaschanicue (r =0.34,P ＜ 0.05),in addition,hole fleas index was in negative correlation with the average temperature of the current and preceding first,second and third years (r =-0.44,-0.39,-0.45,-0.54,P ＜ 0.01).However,hole fleas index positively correlated with the average rainfall of preceding first year (r =0.38,P ＜ 0.05).More specifically,the monthly body flea index was negatively correlated with the average rainfall and the average temperature of current,preceding first,second,and third months,and the average relative humidity of current month (r =-0.23,-0.34,-0.43,-0.29,-0.25,-0.33,-0.36,-0.38,-0.26,P ＜ 0.01).After multiple linear regression analysis,the following equations were obtained:body fleas index =3.983 1 + 0.695 1 × Sperrnophilus density-0.004 9 × average annual rainfall;hole fleas index =10.780 4 + 0.009 1 × average annual rainfall-0.216 2 × annual average relative humidity.Conclusions The relationship between fleas density of Spermophilus alaschanicue and the environment is complex,they have mutual connection as well as mutual restriction.Except Spermophilus density affects the number of fleas,the two most important meteorological factors which affect the flea body index are temperature and rainfall.In addition,the relationship between meteorological factors and flea body index shows somewhat lagging behind for two to three months.
