Clayton H M, Trawford A F
Equine Vet J. 1981 Jul;13(3):192-4. doi: 10.1111/j.2042-3306.1981.tb03483.x.
A field study was designed to investigate the re-establishment of patent lungworm infections in donkeys following an anthelmintic treatment regime which was effective against Dictyocaulus arnfieldi. In April 1979 faecal samples from 259 donkeys were examined and each animal classified as a negative, low positive or high positive excretor of lungworm larvae. During the summer the control group of 126 donkeys showed an increase in the number of excretors from 80 per cent in April to 91 per cent in October. At the same time there was a rise in the faecal larval output of individual animals so that by October 59 per cent were classified as high positive compared with only 20 per cent in April. The treated group of 133 donkeys received 3.5 g mebendazole daily for 5 days during April and as a result the number of excretors fell from 66 per cent pretreatment to 23 per cent one month after treatment. Despite exposure to infected pastures throughout the summer this figure was maintained at a comparatively low level and by October patent infections had been re-established in only 15 per cent of the donkeys that were negative after treatment.
一项实地研究旨在调查在采用对马圆线虫有效的驱虫治疗方案后，驴体内肺线虫感染的重新建立情况。1979年4月，对259头驴的粪便样本进行了检查，并将每头动物分类为肺线虫幼虫的阴性、低阳性或高阳性排出者。在夏季，126头驴的对照组中，排出者数量从4月的80%增加到10月的91%。与此同时，个体动物的粪便幼虫排出量有所增加，到10月时，59%被分类为高阳性，而4月时仅为20%。133头驴的治疗组在4月每天接受3.5克甲苯达唑，持续5天，结果排出者数量从治疗前的66%降至治疗后一个月的23%。尽管整个夏季都暴露在受感染的牧场中，但这一数字维持在相对较低的水平，到10月时，仅15%治疗后呈阴性的驴重新建立了明显的感染。
