鶏に寄生する棘溝条虫の発育史に関する研究 [in Japanese] On the Life History of the Poultry Cestode, Raillietina (Raillietina) echinobothrida [in Japanese]
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Some experiments were carried out in the hope of finding the intermediate host of Raillietina (R.) echinobothrida in Japan. (1) The gravid segment which passed to the exterior with the feces of infested chicken is filled with a large number of egg capsules (Fig. 1), each of which is surrounded by a transparent membrane and contains 3 to 8 eggs. The onchosphere (Fig. 2) is subspherical in shape, measuring 24 to 27μ in longer axis and 24 to 26μ in shorter axis. (2) The onchosphere which has been taken into the alimentary canal of the ant, Tetramorium caespitum jacoti, migrates into the abdominal cavity of the insect where it develops into a mature cysticercoid (Fig. 3). 25 of 1937 individuals of Telramorium caespitum jacoti collected from the 14 poultry farm yards of the Nara Prefectural Agricultural Laboratory during the months of October and November, 1952, harbored the cysticercoid of Raillietina (R.) echinobothrida, that is, the rate of infestation was 1.3%. The measurements of the cysticercoids are shown in Table 1. (3) The results of feeding experiment with the cysticercoids on two White Leghorn fowls given in Table 2 show that the rate of infestation in each bird was 18%. Tetramorium caespitum jacoti is therefore an intermediate host of Raillietina (R.) echinobothrida.
- Zoological magazine
Zoological magazine 62(6), 202-205, 1953-06