Studies on the systematics of parasitic protozoa gregarines

1.对几种环节动物进行了乙酰苯丙胺的侵染试验。三个人。3株无孢子虫、2株线虫和1株单胞藻分别感染赤子爱胜蚓、松材线虫、平菇。2.寄生在赤子爱胜蚓体内的赤子爱胜蚓的感染率和体长的季节变化。春季至初夏感染率较高，盛夏以后有所下降。体长的季节变化较小，但平均体长较大。3.用透射电子显微镜和扫描电子显微镜观察了鱼体表面、细胞核和粘液的超微结构，并对其周缘和毛状突起的超微结构进行了研究。突起的形态类似纤毛或鞭毛，但其超微结构与纤毛或鞭毛的特征完全不同。从体内分离出蜻蜓的细胞核，用透射电子显微镜和扫描电子显微镜观察，表面覆盖着细小的纤维网。4.研究了几种不同寄主之间的交叉侵染。德国斑潜蝇、日本紫罗兰和美洲大蠊之间未发生交叉感染。交叉感染只发生在德国小菜蛾和日本小菜蛾之间。

1.Several species of Annelida were examined on the infection of acephaline gregarines. Three of them. Eisenia foetida SAVIGNY,Pontodrilus matsushimensis IZUKA,Pheratima communissima GOTO et HATAI were infected with 3 Apolocystis, 2 Nematocystis and 1 Monocystidae gregarines. With the characters, all of them were undescribed species in Japan untill now.2.Seasonal changes of infection rate and body length of acephaline gregarines parasitized in Eisenia foetida. The infection rate become high from spring to early summer but decrease from midsummer. The seasonal chage of the body length is small but the average of the body length is rather large in witer.3.The ultrastructure of the body surface, nucleus and mucron were examined by TEM.and SEM.The ultrastructure of periphery and hair-like projection of Filipodium ozakii was studied. The appearance of projection resembled cilia or flagella but their ultrastructure was characteristic and completely different from them. The nucleus of Odonaticola was isolated from the body and observed by TEM and SEM.The surface was covered with the fine fibrous net.4.The cross infection of Gregarina blattarum was studied amoung several different species of the hosts. The cross infection was not occured among Blatella germanica Periplaneta fuliginosa, Perilaneta japonica and Periplaneta americana. The cross infection was only occured between Blatella germanica and Blatella nipponica.