Morsy K, Al-Kahtani M, Shati A, El-Kott A, Abdel-Gaber R, Fol M
Department of Biology, College of Science, King Khalid University, Abha, Saudi Arabia.
Department of Zoology, Faculty of Science, Cairo University, Cairo, Egypt.
Helminthologia. 2019 Mar 6;56(1):22-29. doi: 10.2478/helm-2018-0041. eCollection 2019 Mar.
(Oxyurida) is a lizard gastrointestinal nematode parasite with a life cycle including lizards as main hosts. However, some species are known to parasitize anurans. In the present study, isolated from the large intestine of the Egyptian changeable lizard, was described and illustrated. Forty five specimens of these animals were collected from south Sinai desert, Egypt during the period from May to September 2017. After necropsy, the body was opened by a longitudinal incision from vent to throat, and the gastrointestinal tract was removed. The esophagus, stomach, small and large intestines were examined separately for helminthes. The recovered nematodes were examined by light and scanning electron microscopy. Thirty six specimens (80.0 %) were found to be naturally infected. The parasite was robust with prominent cuticular transverse annulations. Mouth surrounded by three bilobed lips, each with tiny labial papillae. Three pairs of caudal papillae were observed in male worms; 1 pair precloacal, 1 pair sublateral in cloacal opening line, 1 pair in proximal region of caudal appendage on its narrowed point. The posterior extremity beard dorsally directed caudal appendages. Females were with a conical posterior end terminated at a terminal spike. Ovaries reached esophageal isthmus but not wrapped around corpus. The parasite recorded was compared morphologically and morphometrically with the most similar species, it was found that it was most similar to with new host and locality records.
尖尾线虫目是一种寄生于蜥蜴胃肠道的线虫寄生虫，其生命周期以蜥蜴作为主要宿主。然而，已知某些物种也寄生于无尾两栖类动物。在本研究中，对从埃及变色蜥大肠中分离出的[寄生虫名称未给出]进行了描述和图示。2017年5月至9月期间，从埃及西奈沙漠南部收集了45只这种动物的样本。尸检时，通过从泄殖腔到咽喉的纵向切口打开尸体，并取出胃肠道。分别检查食管、胃、小肠和大肠中的蠕虫。对回收的线虫进行了光学显微镜和扫描电子显微镜检查。发现36个样本（80.0%）受到自然感染。该寄生虫粗壮，体表有明显的横向环纹。口部被三个双叶唇包围，每个唇上有微小的唇乳头。在雄虫中观察到三对尾乳头；一对位于泄殖腔前，一对在泄殖腔开口线的亚侧，一对在尾附器近端区域的变窄处。后肢有背向的尾附器。雌虫后端呈圆锥形，末端有一个尖刺。卵巢延伸至食管峡部，但未环绕食管体部。将记录的该寄生虫与最相似的物种进行形态学和形态测量学比较，发现它与[最相似物种名称未给出]最为相似，有新的宿主和产地记录。
