The Research On Gastrointestinal Parasites In White-Headed Langurs(Trachypithecus Leucinephalus)

The white-headed langur(Trachypithecus leucinephalus),a special primate in China,belongs to the first class national protected animal.It is only distributed in Nonggang Nature Reserve,Guangxi,China and Chongzuo White-headed Langur National Nature Reserve,Guangxi,China.With the increase of human activities,the habitat fragmentation trend is increasing,in order to understand the impact of seasonal,human interference,habitat fragmentation and other factors on the intestinal parasite infection of white-headed langur,from October 2018 to October 2019,the white-headed langur in Banli area,Bapen area,Chongzuo White-headed Langur National Nature Reserve and Longrui area,Nonggang National Nature Reserve was taken as the research object,the stool samples of White-headed Langur groups in the above three areas were tested for intestinal parasite types,infection intensity and infection rate,based on the results,the influence of seasonal,human disturbance and habitat fragmentation on the intestinal parasite infection and transmission of white-headed langur were analyzed.The factors causing the difference of intestinal parasite infection rate were analyzed to effectively reduce the intestinal parasite infection rate of white-headed langur and inhibit the parasite infection,it provides scientific basis for effectively reducing intestinal parasite infection rate,inhibiting parasite transmission path and reducing parasite transmission risk.The main results are as follows:1.A total of 10 species of gastrointestinal parasites of white-headed langur(Trachypithecus leucocephalus)have been detected: Amoeba sp.,Oesophagostomum spp.,Strongyloides spp.,Oesophagostomum apiostomun,Isospora sp.,Ancylostoma sp.,Balantidium coli,Ascaris lumbricoides,Streptopharagus spp.,Bertiiella studeri.2.By the analysis of seasonal differences on infection rates of 8 gastrointestinal parasites with a high infection rate in chengdu,the results showed that except Amoeba sp.,the infection rates of Oesophagostomum spp.,Strongyloides spp.,Oesophagostomum apiostomun,Isospora sp.,Ancylostoma sp.,Balantidium coli,Ascaris lumbricoides,Streptopharagus spp.,Bertiiella studeri were all significantly different in dry and rainy seasons.And the infection rates in rainy seasons were significantly higher than those in dry seasons.3.Among the three areas,there are 10 kinds of intestinal parasites in Banli area,7 in baban area and only 5 in Longrui area.The regional analysis of gastrointestinal parasite infection rates in three areas showed that: In January,there were no significant differences in the infection rates of the 7 parasites co-infected in the Banli-Bapen area.In June,the infection rates of the 7 parasites co-infected in the Banli-Bapen area were significantly different except for the amoeba.In February and November,the infection rates of the 5 parasites co-infected in the Banli-Longrui area were significantly different.In dry season,the infection rates of the 5 parasites co-infected in the Bapen-Longrui area were significantly different except for the Oesophagostomum apiostomun and Balantidium coli.4.The infection intensity(EPG value)of the three nematodes with the highest infection rate(Oesophagostomum spp.,Strongyloides spp.,Oesophagostomum apiostomun)was calculated,among them,the infection intensity of Oesophagostomum spp.and Strongyloides spp.was in the middle level,while that of Oesophagostomum apiostomun was lower,the current infection intensity is not enough to cause the outbreak of large-scale intestinal parasitic infection in the white-headed langur population.