【摘要】 <正> 陇南文县、川北南坪系甘肃和四川两省毗邻县份,群山连绵、峻岭险各为其自然特点。近数年这二县黑热病病例和内脏利什曼病犬不断出现。据甘肃省地方病防治研究所和两县防疫站调查资料,1985年至1986年8月止,黑热病新发病例有354例,其中文县308例,南坪46例。这一发病数比解放初有过之而无不及。近2～3年陇、川两省及上述两县防疫站在防治和消灭黑热病方面更多还原

【Abstract】 Four species of sandflies were found in southern Gansu and northern Sichuan and identified as P. chinensis S. koloshanensis, S. sauamirostris, and S. suni, P. chinensis is the most common one, large in number and wide in distribution.Our preliminary investigation in the mountainous region showed that P. chinesis is a typical exophilic species belonging to anautogenous form.Altitude distribution of sandflies in the mountainous region of Wen County, Gansu Province and Nanping County, Sichuan Province, were observed. It was found that two different types of P. chinensis exist in the localities of 980 to 2370 metres above sea level. The type existing above 2000 metres is the large one and rhe small one exists below 1500 metres. A mixed distribution area of the two types of P. chinensis was found in the locations between 1500 and 2000 metres above sea level.Ecological and epidemiological data obtained in the present investigation indicate that the large type of P. chinensis is a favourable vector in the mountainous region above 1800 metres which transmits visceral leishmaniasis to canine with the existence of a zoonotic focus, while canine visceral leishmariasis was found commonly in the regions below 1600 metres where the small type of P. chinensis is believed to play the role of the disease vector.更多还原