Study on the relationship between the community structure of ectoparasitic flea of plague host and the epidemic intensity of epizootic plague in the mountain plague foci in Xinjiang Uygur Autonomous Region
Objective To understand and analyze the relationship between the community structure of the main host animal ectoparasitic flea and the epidemic of epizootic plague and its influence on the epidemic of animal plague in four types of mountain plague natural foci in Xinjiang Uygur Autonomous Region(Xinjiang).Methods The community ecology method was used to calculate the diversity,evenness,dominance and richness of the flea community.Wilcoxon rank sum test was used to analyze the community structure difference of flea,and Spearman rank correlation test was used to analyze the correlation between the ecological structure of flea and the positive rate of serum antibody of host animal.Principal component analysis was used to extract the principal components of ecological indicators,and the principal components were incorporated into generalized addition model(GAM)and random forest model to analyze the relationship between the principal components and the epidemic intensity of animal plague.Results There were statistically significant differences in the ecological structure of the host active flea community in the four types of mountain plague focus(all P<0.001),and there were positive correlations between the flea infection rate,flea index,flea richness and diversity and the positive rate of host active serum antibodies(rs=0.682,P<0.001;rs=0.686,P<0.001;rs=0.529,P<0.001;rs=0.339,P=0.023).GAM analysis showed that the positive rate of host antibody was linearly positively correlated with principal component 1(PC1),which consisted of flea index and flea infection rate,and nonlinearly correlated with principal component 2(PC2),which consisted of flea diversity and abundance.The random forest model fitting results showed that the importance scores of PC1 and PC2 factors were 24.84 and 4.52,respectively.Conclusions The flea population in the mountainous plague foci of Xinjiang is rich in diversity.The increase of flea index and flea infection rate may enhance the epidemic intensity of animal plague,and the diversity and species richness of flea may regulate the epidemic of animal plague.
PlagueNatural fociFlea communityDiversityXinjiang Uygur Autonomous Region
NETL
NSTL
万方数据
