Han E T, Lee J H, Choi S Y, Park J H, Shin E H, Chai J Y
Department of Parasitology, Kangwon National University College of Medicine, Chunchon, Kangwon-do 200-701, Republic of Korea.
J Parasitol. 2003 Dec;89(6):1245-8. doi: 10.1645/GE-3232RN.
The surface ultrastructure of advanced third-stage larvae (AL3) of Gnathostoma nipponicum was studied using scanning electron microscopy. The larvae were recovered from the grass snake Rhabdophis tigrina in the Republic of Korea. Parasites had a globular head bulb with a pair of lips at the anterior end and 2 labial papillae and an amphid on each lip. The head bulb was characteristically armed with 3 transverse rows of hooklets, averaging 36, 38, and 43 in number, increasing posteriorly. A total of 213-232 minute unidentate cuticular spines were present along the entire length of the larvae, forming the transverse striations. Two pairs of cervical papillae were located between the 8th and 12th transverse striations, and a pair of body papillae was seen laterally on the posterior third of the body. A pair of caudal phasmids was recognized near the posterior extremity. The surface ultrastructure of AL3 of G. nipponicum is unique compared with that of other species.
利用扫描电子显微镜研究了日本颚口线虫晚期第三期幼虫（AL3）的表面超微结构。这些幼虫是从韩国的虎斑颈槽蛇体内采集到的。寄生虫具有一个球状的头球，前端有一对唇，每个唇上有2个唇乳突和一个头感器。头球的特征是有3排横向小钩，数量平均分别为36、38和43个，向后逐渐增加。幼虫全长共有213 - 232个微小的单齿角质刺，形成横向条纹。两对颈乳突位于第8至第12条横向条纹之间，一对体乳突出现在虫体后三分之一的侧面。在虫体后端附近可识别出一对尾感器。与其他物种相比，日本颚口线虫AL3的表面超微结构是独特的。
