||Spirochete Treponema pallidum
||Brock TD. Microbial growth rates in nature. Bacteriol Rev. 1971 Mar35(1): p. 57 left column 2nd paragraphPubMed ID4929658
||Davis, B. D., R. Dulbecco, H. N. Eisen, H. S. Ginsberg, and W. B. Wood. 1968. Microbiology. Hoeber Medical Division, New York
||Treponema pallidum is a gram negative bacteria that causes syphilis, An average incubation time of 17 days is required for a demonstrable lesion after the intradermal injection of 500 organisms and the time required for the development of a lesion is reduced by 4 days for each 10-fold increase in inoculum size.