Eric Walker added Treponema to Spirochaetaceae, and added Spirochaetaceae to Spirochaetales

Eric Walker added Syphilis and Treponema pallidum - Wikipedia to Treponema pallidum, and added Treponema pallidum to Treponema

Eric Walker added Treponema pallidum to Treponema, and added Treponema to Gram-negative bacteria and Spirochaetaceae

Eric Walker added a number of topics and a number of links to Gram-negative bacteria, and added Gram-negative bacteria to Bacteria and Gram staining