Taira N, Fujita J
First Research Division, National Institute of Animal Health, Kannondai, Ibaraki, Japan.
J Vet Med Sci. 1991 Jun;53(3):409-13. doi: 10.1292/jvms.53.409.
Between 1982 and 1988, ascarid nematodes were found in the feces of Japanese calves in Kyushu and Okinawa districts. Seven males and 21 females of the ascarids were observed morphologically for identification of species. Male and female ascarids were 15.64 (14.0-18.0) cm and 25.75 (16.5-34.0) cm in average length, respectively. Eggs were 81.6 microns and 71.8 microns in large and small diameters, respectively. The body of ascarids was translucent and soft. The boundary between the enlabium and prelabium of lip was clearly visible and the esophageal ventriculus was also observed. The vulva was situated at a distance of about 1/7 approximately 1/9 of body length from the anterior end of body. The surface of egg shell was relatively smooth, without rugose albuminous coat. These morphological features coincided with those of Toxocara vitulorum.
1982年至1988年间，在九州和冲绳地区的日本犊牛粪便中发现了蛔虫线虫。对7只雄性和21只雌性蛔虫进行了形态学观察以鉴定其种类。雄性和雌性蛔虫的平均长度分别为15.64（14.0 - 18.0）厘米和25.75（16.5 - 34.0）厘米。虫卵的大径和小径分别为81.6微米和71.8微米。蛔虫的身体半透明且柔软。唇部的唇叶和前唇叶之间的界限清晰可见，同时也观察到了食管胃。阴门位于距离身体前端约1/7至1/9体长的位置。卵壳表面相对光滑，没有粗糙的蛋白膜。这些形态特征与牛弓首蛔虫相符。
