Case 167. 

Electron micrograph of Borrelia burgdorferi isolated from the skin lesion of Lyme borreliosis
　 　 　 　
　
Negative staining observation shows morphology of loosely coiled Spirocheta.
 　
　 　 　 　

　

 　 Compare the ultrastructural morphology of Borrelia with that of Leptospira as shown in case 154.