| colonial morphology of treponemes observed by electron microscopy. | the colonial morphology of three strains of cultivable, nonpathogenic treponemes including a human oral treponeme was examined by light and electron microscopy. treponema phagedenis strains kazan and reiter produced large white colonies on the surface of solid media composed of sterility test broth, 0.9 to 3.1% agar, rifampin, and 12.5% rabbit or horse serum. a human oral treponeme, strain g7201 , grew as diffused white zones on 0.9 to 3.1% agar plates. under the cultural conditions employed aga ... | 1984 | 6727709 |