Das Scheidensekret und seine Bedeutung für das Puerperalfieber.

Döderlein's study of the vaginal secretion in relation to puerperal fever includes the first description of “Döderlein’s bacillus” (Lactobacillus). Döderlein introduced the concept of normal body bacteria or "normal body flora" --what would much later be named the microbiome. Digital facsimile from the Internet Archive at this link.