Microbiology Spirochetes 1fd80af2 Characteristic of primary chancre:(1988) A Painless punched out ulcer B Painless ulcer with over hanging edges C Painless ulcer with irregular raised edges D Painful punched out ulcer High-Yield Explanation Ans: a (Painless punched out ulcer)Ref: Ananthanarayan Micro, 7th ed, p. 379 & 6th ed, p. 350, Harrison, 16thed, p. 979 & 15th ed, p. 1048