日本家蚕的原虫病,以前只知道微粒子病一种。后由藤原、石原等又发现一种原虫病,叶细型微粒子病。田中茂男等1970年在长野县从农家采集的晚蚕中,又发现与微粒子病和叶细型微粒子病都不同,是由一种小孢子虫引起的疾病,暂称为小型微粒子病。1、病征及孢子大小病蚕发育慢,体色正常,体皮无黑色斑点。病蚕解剖检查,绢丝腺没有乳白色的现象,而 Japanese silkworm protozoal disease, previously only know a particle disease. After the Fujiwara, Ishihara also found a protozoan disease, leaf fine particle disease. Tanaka Mau and other latecomers collected from farmers in Nagano prefecture in 1970 found that they were caused by a kind of microsporidian disease, which was different from micro-particle disease and leaf-shaped micro-particle disease, tentatively referred to as micro-particle disease. 1, symptoms and spore size The disease slow silkworm development, normal body color, black skin no black spots. Disease silkworm anatomy, silk gland no milky phenomenon, however