家犬溴氰菊酯药浴阻断内脏利什曼病传播的研究

在犬内脏利什曼病的高发区川北南坪县，择三乡一镇，连续2年（1992－1993）开展家犬溴氰菊酯药浴实验，浴犬率达99．0％以上。实验前的1991年度实验区内脏利什曼病新感染者13例；在1992年白蛉季节中经2次浴犬后，1992年度三乡一镇的新病例为11例；至1993年白蛉季节中又进行2次治犬后，经考核，1993年度实验区内未见新发病例出现。显示1年2次连续2年的浴犬工作，对于阻断内脏利什曼病的传播具有较好的效果，并具有一定的推广意义。

STUDIES ON THE DELTAMETHRIN-MEDICATED BATH OF DOMESTIC DOGS FOR INTERRUPTING VISCERAL LEISHMANIASIS TRANSMISSION

In a previous paper, it was reported that deltamethrin-medicated bath of domestic dogs had a strong killing effect against Ph. chinensis, and could also inhibit its blood sucking ability or cause its death shortly after blood sucking. The effect could last for 3O days to 114days, and mostly for 2 months in the local area.Based on our previous study, three villages (Yongle, Yongfeng, Anle ) and a town (Chengguan) were selected from the mountainous region with high incidence of visceral leishmaniasis in Nanping County, northern Sichuan for carrying out an extensive experiment of medicated bathing of domestic dogs, where there were 13 new infected cases in the year of 1991 before the experiment. During the sandfly season in 1992, two rounds of rnedicated bathing of dogs were conducted, the drug concentration used was 50 ppm. From September 1992 to August 1993, the number of new infected cases was 11 in the above mentioned three villages and a town. Another two rounds of medicated bathing of dogs had been conducted during the sandfly season in 1993.The results show that there was no new infection from September 1993 to October 1994 in the three villages and a town, indicating that through two years' consecutive extensive medicated bathing of dogs in the endemic areas, canine visceral leishmaniasis transmission had been signlficantly interrupted.The authors consider that in the mountainous region of southern Gansu and northern Sichuan where it has been difficult to treat dogs, it might be more practical to use deltamethrin bathing of dogs for interrupting the transmission of canine visceral leishmania sis.