Cho Shin-Hyeong, Kim Tong-Soo, Kong Yoon, Na Byoung-Kuk, Sohn Woon-Mok
Department of Malaria and Parasitic Diseases, National Institute of Health, Seoul 122-701, Korea.
Korean J Parasitol. 2007 Sep;45(3):191-8. doi: 10.3347/kjp.2007.45.3.191.
A total of 205 larval gnathostomes were collected from 18 (22.5%) of 80 red banded odd-tooth snakes, Dinodon rufozonatum rufozonatum, which had been smuggled from China and confiscated at Customs in Busan, Republic of Korea. In order to identify the species, some of the larvae were observed by a light microscope and a scanning electron microscope (SEM). The larvae were 2.18 x 0.29 mm in average size, and had a pair of lips at the anterior end, a muscular esophagus, 2 pairs of cervical sacs, and brownish intestines. The head bulb was characteristically equipped with 4 rows of hooklets; the average number of hooklets in each respective row was 38.6, 40.5, 41.5, and 43.7. In SEM views, the mouth evidenced a pair of lateral lips of equal size in a half-moon shape. Each lip featured a couple of labial papillae and a small amphid located between the 2 papillae. The hooklets on the head bulb had single-pointed, posteriorly-curved tips. The cuticular spines were larger and more densely distributed on the anterior part of the body, and decreased gradually in size and number toward the posterior body. On the basis of these morphological characteristics, the larvae were identified as the third stage larvae of Gnathostoma hispidum.
从80条红纹钝头蛇（Dinodon rufozonatum rufozonatum）中的18条（占22.5%）身上共采集到205条颚口线虫幼虫，这些红纹钝头蛇是从中国走私而来，在韩国釜山海关被查获。为了鉴定物种，部分幼虫通过光学显微镜和扫描电子显微镜（SEM）进行观察。幼虫平均大小为2.18×0.29毫米，前端有一对唇，有肌肉质的食管、2对颈囊和褐色的肠道。头球的特征是有4排小钩；每排小钩的平均数量分别为38.6、40.5、41.5和43.7。在扫描电子显微镜观察下，口部可见一对大小相等的半月形侧唇。每个唇有一对唇乳头和位于两个乳头之间的一个小化感器。头球上的小钩尖端单点、向后弯曲。体表棘在身体前部更大且分布更密集，向身体后部大小和数量逐渐减少。基于这些形态特征，幼虫被鉴定为刚刺颚口线虫的第三期幼虫。
