摘要
目的对我国云南地区微小按蚊A、C栖息习性进行初步探讨。方法在云南省勐腊县和元江县各选取一个自然村的人房和牛房,采用紫外灯通宵悬挂诱捕法采集蚊虫样本,将经形态学鉴定的微小按蚊的样本,分别取单蚊蚊腿,经多重PCR方法鉴别为微小按蚊A或C,统计其在人房和牛房的分布差异。对疑为微小按蚊A/C杂合子的,采用等位基因特异扩增法、PCR产物酶切片段长度多态性分析和测定D3序列进行鉴定。结果在人房中,微小按蚊A所占比例为21.4%,微小按蚊C为78.6%;牛房中,微小按蚊A所占比例为18.5%,微小按蚊C为81.5%,分布差异无统计学意义(χ2=0.4157,P>0.05)。疑为微小按蚊A/C杂合子的样本,等位基因特异扩增法(PCR-ASA)、PCR产物酶切片段长度多态性分析(PCR-ASA)结果同时出现微小按蚊A、C的特征条带(PCR-ASA:376、294和112bp,PCR-RFLP:108、268和376bp),其D3序列在微小按蚊A与C的所有5个变异位点均出现杂合峰信号,即同时具有微小按蚊A和C相应碱基的峰信号。结论尚未发现我国云南微小按蚊A、C在人房和牛房的栖息比例存在差异。在我国云南勐腊县首次发现微小按蚊A/C杂合子。
Objective To compare the difference of resting habitat between Anopheles minimus A and An. minimus C in Yunnan Province. Methods A village was selected in Mengla and Yuanjiang County respectively to collect mosquitoes by hanging ultraviolet lamps inside the cattle pen and human dwellings. The samples were identified by multiplex-PCR after morphological examination. Suspicious An. minimus A/C hybrid samples were identified by PCR-ASA, PCR-RFLP and D3 region sequence. Results In human dwellings, the proportion of An. minimus A and C was 21.35% and 78.65%, and in cattle pen, 28.54% and 71.46% respectively. As for the An. minimus A/C hybrid, the result of PCR-ASA and PCR-RFLP displayed the pattern of both An. minimus A and An. minimus C (PCR-ASA: 376? 294 and 112 bp, PCR-RFLP:108? 268 and 376 bp), the D3 sequence displayed heterozygosis in the variation place of An. minimus A and An. minimus C, which means that the hybrid possesses the signal of both An. minimus A and An. minimus C. Conclusion There is no resting habit difference between An. minimus A and An. minimus C in Yunnan Province. In Mengla County, 5 An. minimus A/C hybrids have been found for the first time.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
2005年第3期146-149,共4页
Chinese Journal of Parasitology and Parasitic Diseases
关键词
微小按蚊
栖息习性
杂合子
Anopheles minimus
Resting habit
An. minimus A/C hybrid
