Fisher M A, Jacobs D E, Hutchinson M J, Dick I G
Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, North Mymms, Hatfield, Hertfordshire.
Vet Rec. 1996 Jan 27;138(4):79-81. doi: 10.1136/vr.138.4.79.
Four groups of six cats were kept in carpeted pens similarly infected with Ctenocephalides felis. One group was left untreated, but the other groups were treated every 28th day with either an insecticide (fenthion at 30 mg); or an inhibitor of insect development (lufenuron at 133 or 266 mg) or with both. A sudden upsurge in the numbers of fleas occurred on the control cats after 50 days. At this time, the three control strategies had reduced the counts by 91.3, 72.5 and 98.6 per cent, respectively. Thereafter, welfare considerations demanded the limitation of the flea burden on the control cats, but conditions were shown to be favourable for flea development throughout the study. The mean numbers of fleas on the treated groups after six months were 1.2, 11.0 and 0.4 respectively. After this, in addition to the fleas acquired in the pen, the cats were each infected weekly with five fleas to mimic roaming animals introducing extraneous fleas into the home. This produced no obvious effect on the counts and the mean values three months later were 0.5, 11.0 and 0.2, respectively. None of the strategies eradicated the flea population but they all reduced the numbers considerably and worked equally well whether or not small numbers of new fleas were introduced into the system. Significantly lower flea counts were maintained in the early and later stages of the study by the strategies including the insecticide.
将四组每组六只猫饲养在铺有地毯的围栏中，它们同样感染了猫栉首蚤。一组不进行治疗，而其他组每隔28天分别用一种杀虫剂（30毫克倍硫磷）、一种昆虫发育抑制剂（133毫克或266毫克氟虫脲）或两者同时进行治疗。50天后，对照猫身上的跳蚤数量突然激增。此时，三种控制策略分别使跳蚤数量减少了91.3%、72.5%和98.6%。此后，出于福利考虑，需要控制对照猫身上的跳蚤负担，但在整个研究过程中，条件显示有利于跳蚤的生长。六个月后，治疗组的跳蚤平均数量分别为1.2只、11.0只和0.4只。在此之后，除了在围栏中感染的跳蚤外，每只猫每周还感染五只跳蚤，以模拟流浪动物将外来跳蚤带入家中的情况。这对跳蚤数量没有产生明显影响，三个月后的平均值分别为0.5只、11.0只和0.2只。没有一种策略能根除跳蚤种群，但它们都显著减少了跳蚤数量，并且无论是否有少量新跳蚤进入系统，效果都同样良好。在研究的早期和后期，包括使用杀虫剂的策略都能使跳蚤数量显著降低。
