Gumpert J, Todorov T, Toshkov A
Z Allg Mikrobiol. 1978;18(6):409-14.
The stable L-form of Erysipelothrix rhusiopathiae is a typical protoplast type L-form. Cells are surrounded by a trilamellar cytoplasmic membrane only. They grow in form of aggregations in liquid media and their diameters vary between 0.1 and 2 micrometer. Always a large portion of cells undergoes lysis. It seems to be characteristic for L-form cultures of E. rhusiopathiae that always many artifact structures are formed. The artifacts are spherical particles with diameters of 0.1 micrometer to more than 3 micrometer. They can be differentiated from L-form cells only by electron microscopy. The artifacts consist of electron dense amorphous material and their surface is irregular without a clear boundary line. Obviously, these artifacts are produced from protein components of the medium and from cytoplasmatic components of the lysing L-form cells.
猪丹毒杆菌的稳定L型是典型的原生质体类型L型。细胞仅被三层细胞质膜包围。它们在液体培养基中以聚集体形式生长，直径在0.1至2微米之间。总是有很大一部分细胞发生裂解。猪丹毒杆菌L型培养物的一个特征似乎是总是形成许多人为结构。这些人为结构是直径为0.1微米至超过3微米的球形颗粒。只有通过电子显微镜才能将它们与L型细胞区分开来。这些人为结构由电子致密的无定形物质组成，其表面不规则，没有清晰的边界线。显然，这些人为结构是由培养基的蛋白质成分和裂解的L型细胞的细胞质成分产生的。
