摘要
云南省日本血吸虫病流行于17个县、市,50年代至今钉螺面积2.19亿m^2,病人30.15万。由于自然地理和社会诸因素的综合作用,钉螺和血吸虫病的分布有强烈的地方性。在海拔1350～2450m,年均温11.8～19.5℃,年降雨量574～970mm地带,均有血吸虫病流行。而以海拔1800m左右,年均温15.7℃左右,年降雨量800mm左右的地带,人群血吸虫病感染率最高。水稻土带宜于钉螺孳生,更适宜于血吸虫病传播,亦常常是血吸虫病严重流行地带;红壤土带仅有少数钉螺孳生,血吸虫病流行程度轻;棕壤和高山草甸土带不宜钉螺孳生,未发现血吸虫病。
Schistosomiasis prevails in 17 counties and cities in Yunnan Province.Approximately, a population of 301 511 were affected and the snail-ridden area amounted to 219 000 000m2 in the past years. These endemic areas were not evenly distributed, but rather scattered.The endemic foci were vertically distributed at an altitude of 1 350-2 450 metres above sea level. Human cases were found mostly in areas with an elevation of ≥1 800 metres, and became progressively fewer with the ascent. However, in areas with an-elevation of ≤1800 metres, the infection rate in the inhabitants decreased with the descent.In areas with an average temperature of 11.8-19.5℃ and the annual rainfall up to 574-970mm, transmission of the Schistosomiasis was always present, suggesting an annual mean temperature around 15.7℃ and rainfall 800-900mm were favourable factors for Schistosomiasis transmission.The cultivated areas with paddy soils were most suitable for the breeding of Oncome-lania snails, where Schistosomiasis was severely prevalent. Only a few Oncomelania snails and patients were observed in areas covered with red loam. No patient or snail was found in areas with brown loam or mountain meadow soil.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
1990年第3期187-190,共4页
Chinese Journal of Parasitology and Parasitic Diseases
关键词
日本血吸虫病
地理流行病学
钉螺
Yunnan Province, schistosomiasis japonica, geographical epidemiology, altitude, rainfall
