“The initial strain of the agent was isolated from the semen and secretions of 6 out of 26 experimentally infected rabbits and 4 spontaneously recovered bulls (L. hebdomadis). … The application of semen infected with pathogenic leptospirae for artificial insemination causes the animals falling ill with leptospirosis accompanied by abortions, reduced fertility and stillbirths of rabbits.” J Hyg Epidemiol Microbiol Immunol. 1976;20(2):207-13. Leptospirosis infection through insemination of animals. Kiktenko VS, Balashov NG, Rodina VN. http://www.ncbi.nlm.nih.gov/pubmed/?term=Leptospirosis+infection+through+insemination+of+animals.++Kiktenko+VS%2C+Balashov+NG%2C+Rodina+VN.