Löhr K F, Omukuba J N, Njogu A R, Maloo S H, Gisemba F, Okedi T, Mwongela S
Department of Veterinary Services, Veterinary Investigation Laboratory, Mariakani, Kenya.
Trop Med Parasitol. 1991 Jun;42(2):131-4.
The effects of bi-weekly flumethrin pour-on treatments at 1 mg kg bodyweight on tsetse fly population and trypanosome infection rates were monitored over a one-year period (2/89-2/90) in 2000 head of cattle on a trial farm, located in the Lamu District in East Kenya, an adjacent control farm and a transsecting road for additional fly monitoring. The tsetse fly population on the trial farm dropped from pretreatment counts of 118 flies/trap/week (Feb. 1989) to 13 in June 1989 and 32 in Jan. 1990. During the same period and months the fly population in the control farm was 90.34 and 87 flies/trap/week. Fly counts on the transsecting road, however, increased from 72.53 to 163 flies/trap/week. The impact of tsetse fly control is clearly reflected in the reduction of trypanosome infection rates on the trial farm, e.g. 37% (pre-treatment infection rate), 10% and 11% in January, June and December 1989 respectively. On the control farm the infection rates remained at distinctly higher levels of 34%, 17% and 24% during the same period. Mean weekly weight gains were 66% higher in the treated herd as compared to the untreated control herd.
在肯尼亚东部拉穆区的一个试验农场，对2000头牛进行了为期一年（1989年2月至1990年2月）的监测，观察每两周一次按1毫克/千克体重进行氟氯氰菊酯浇泼处理对采采蝇种群和锥虫感染率的影响。该试验农场毗邻一个对照农场，还有一条用于额外采采蝇监测的交叉道路。试验农场的采采蝇种群数量从预处理时（1989年2月）的每诱捕器每周118只降至1989年6月的13只和1990年1月的32只。在同一时期和月份，对照农场的采采蝇数量为每诱捕器每周90.34只和87只。然而，交叉道路上的采采蝇数量从每诱捕器每周72.53只增加到163只。采采蝇控制的影响明显体现在试验农场锥虫感染率的降低上，例如，1989年1月、6月和12月的感染率分别为37%（预处理感染率）、10%和11%。同期，对照农场的感染率分别保持在34%、17%和24%的明显较高水平。与未处理的对照牛群相比，处理后的牛群平均每周体重增加高出66%。
