Agneessens J, Engelen S, Debever P, Vercruysse J
Department of Parasitology, Faculty of Veterinary Medicine, University of Gent, Merelbeke, Belgium.
Vet Parasitol. 1998 Jun 15;77(2-3):199-204. doi: 10.1016/s0304-4017(98)00106-x.
Over a period of one year, from December 1995 to November 1996, larvae of Gasterophilus intestinalis were found in 193 horse stomachs (58%) of 330 that were examined in two Belgian slaughter houses. When August is excluded, 62% of the stomachs had bot larvae. No other Gasterophilus species were identified. The monthly prevalence ranged from 9% in August to 75% in November and December. The mean intensity of bot larvae varied from 8 in August to 29 in March, and the majority of the horses (67%) harboured less than 50 larvae. Prevalences and intensities were not affected by age, but mares were more frequently infected than stallions and geldings (P < 0.014). The mean size of the lesions increased from 1 cm2 to 17 cm2. The majority of the larvae were localised near the margo plicatus.
在1995年12月至1996年11月的一年时间里，在比利时的两家屠宰场检查的330匹马的胃中，有193匹马（58%）的胃里发现了肠胃蝇幼虫。若不考虑8月份，62%的胃中有马胃蝇幼虫。未发现其他肠胃蝇种类。每月的感染率从8月份的9%到11月和12月的75%不等。马胃蝇幼虫的平均感染强度从8月份的8条到3月份的29条不等，大多数马匹（67%）体内的幼虫数量少于50条。感染率和感染强度不受年龄影响，但母马比种马和阉割公马更易感染（P < 0.014）。病变的平均面积从1平方厘米增加到17平方厘米。大多数幼虫集中在胃褶缘附近。
