Principato M
Facoltà di Medicina Veterinaria, Istituto di Parassitologia, Perugia, Italia.
Cornell Vet. 1988 Jan;78(1):43-52.
Listed and described herein are the main macroscopic lesions produced along the whole digestive tract of free-ranging horses by larvae of the five Gasterophilus spp., occurring in Umbria, a region of central Italy: Gasterophilus intestinalis, Gasterophilus nasalis, Gasterophilus pecorum, Gasterophilus inermis, Gasterophilus haemorrhoidalis. Lesions are classified on the basis of their sizes and shapes and the host's anatomic sites infested, and they are examined in relation to the developmental stages of larvae causing them. The examination of the lesions shows that it is very difficult to differentiate the hemorrhagic impressions caused by migrating 1st and 2nd instar larvae of all the species in the absence of the specific parasite. It is also difficult to differentiate between the gastric lesions caused by Gasterophilus intestinalis and Gasterophilus pecorum. It has been found that an easy identification is possible even in the absence of parasites for gum lesions and for lesions on the soft palate produced respectively by Gasterophilus intestinalis and Gasterophilus pecorum, for duodenal lesions caused by Gasterophilus nasalis, for rectal lesions caused by Gasterophilus inermis and for duodenal and rectal lesions produced by Gasterophilus haemorrhoidalis.
本文列出并描述了意大利中部翁布里亚地区自由放养马匹的整个消化道中由五种胃蝇属幼虫产生的主要宏观病变，这五种胃蝇分别是：肠胃蝇、鼻胃蝇、驯鹿胃蝇、无刺胃蝇、痔胃蝇。病变根据其大小、形状以及宿主受感染的解剖部位进行分类，并结合引起病变的幼虫发育阶段进行检查。对病变的检查表明，在没有特定寄生虫的情况下，很难区分所有物种的一龄和二龄幼虫迁移引起的出血痕迹。区分肠胃蝇和驯鹿胃蝇引起的胃部病变也很困难。研究发现，即使没有寄生虫，对于肠胃蝇和驯鹿胃蝇分别产生的牙龈病变和软腭病变、鼻胃蝇引起的十二指肠病变、无刺胃蝇引起的直肠病变以及痔胃蝇产生的十二指肠和直肠病变，也能够轻松识别。
