本邦に於ける猫の有棘顎口蟲 : 〔附〕其發育に就て
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概要
- 論文の詳細を見る
Since OWEN first described this worm from the gastric tumor of a young tiger which died in the London Zoological Gardens, there have been about a dozen reports on the adult from the dog, wild and domesticated cats, leopard, weasel etc. and on the larval form in man from various countries but especially from India, Siam, Malay States, Phillippines, China and Japan. In the foreign cases, the adult form was almost all reported from the gastric tumor of the carnivorous mammals. In Japan YOSHIDA have examined about 6565 mincks during past twelve years and found over 50% of them infected. The animals are invaded in the lower part of esophagus to form the tumor and never found infected in the gastric wall. Recently ONOHARA and TOMIHA accidentally found the domesticated cats infected with this worm in the gastric wall. This is probably the first one of this worm found in Japanese cat. In the morphological comparison of three groups of this worm: 1. the foreign worms, 2. worms from Japanese cat, 3. those from the Japanese minck, there is no specific difference of characters among them with only exception of their size. The variation of worm size, however, is probably effected by the different methods of their preservation. For the development of this worm, YOSHIDA devoted himself to study on this subject since 1925, and confirmed the following facts by numerous experiments. The uterine eggs develop into mobile embryos for 5 days or a week in the most favorable conditions, and immediately hatch out. The free swimming embryos easily enter into the Cyclops and develop into the definite size with a head bulb which is characteristic to this worm. YOSHIDA confirmed also that the larvae in the Cyclops never develop in the final host at cat etc., and consequently they need the second intermediate host to complete their life history. Thus since the summer of 1935, numerous feeding experiments were carried and the fact was assumed that the green frog and the gold-fish may serve as the second intermediate host of this parasite.
- 社団法人日本動物学会の論文
- 1936-10-15