关键词: 鼠形动物, 体外寄生虫, 种群, 消长

Abstract: The background survey on population and growth-decline of murine-like animals and their external parasites in Zhanjiang seaport was investigated.The common method was used in this paper.The results show that there were 8 species of murine-like animal(4 genera,2 families and 2 Orders).Three main kinds of external parasite were:3 species of flea(3 genara and 3 families),4 species of Gamasid mite(3 Genera and 2 family)and 9 species of chigger(6 genera and 1 family).The yearly percentage of animals infected with flea,Gamasid mite and chigger was 33.2%, 55.3% and 45.0%,respectively. The severest animals infected with flea,Gamaxsid mite and chigger were R.flavipectus,R.losea and B.indica nemorivaga correspondingly.The corresponding yearly indexes of animals infected with flea,Gamasid mite and chigger were 0.8,4.8 and 32.9.The animals with high infection indexes infected with respectively parasites mentioned above were R.norvegicus and R.losea and B.indica nemorivaga.The corresponding months of high and low infection rate in flea,Gamasid mite and chigger were in April and August,November and June,July,July and December.The corresponding months of high and low infection index were in April and August,August and March,July and December.The conclusions were that the possession of conditions of plague focus and a possibility of existing natural focus of tsutsugamushi disease.